HdrHistogram/hdrhistogram-go holds a health index of 65 out of 100, placing it in the Moderate band. It scores highest on Sustainability & Governance (76/100) and lowest on AI Readiness (56/100). It was last updated 17 days ago. 2 contributors account for most of its recent work.
65
overall / 100
Moderate
Software health index
Metrics are grouped into weighted categories on one standardized 1–100 scale. Overall starts as their weighted mean; when public evidence triggers the High-Risk Jurisdiction Policy, the rating is adjusted and receives an At risk ceiling of 49. AI Readiness sits outside the overall score.
65
Excellent85-100Exemplary; meets essentially all checked criteria
Good70-84Healthy; minor gaps
Moderate50-69Acceptable with notable gaps; review recommended
At risk30-49Significant weaknesses; adoption warrants caution
Critical1-29Severe problems (abandoned, single-maintainer, no hygiene)
Score profile
Each axis is a category. The shape matters more than the average — a healthy subject fills the whole shape, while a spike-and-crater profile means strength in one dimension is masking risk in another.
Direct dependencies free of known advisories — no direct dependency carries a known advisory
0/25
Indirect dependencies free of known advisories — transitive set not separable from development and test dependencies in this scope
0/40
No advisories left outstanding — no advisory carries a publication date
Inputs used
source
osv
advisories
0
affected_packages
0
assessed_packages
9
unassessed_packages
0
affected_by_severity
none
direct_affected_packages
0
Excluded from scoring (no data or not applicable): Indirect dependencies free of known advisories, No advisories left outstanding. Remaining weights renormalized. Matched 9 resolved dependencies against OSV. This repository publishes no package the index resolves, so the repository dependency graph was assessed instead. That graph mixes development and test pins with shipped dependencies, so only the declared runtime dependencies are scored; transitive findings are reported as context and excluded from the score. Reachability is not analyzed.
How well is the repo equipped to be developed and maintained with AI coding agents? An independent, experimental badge — weight 0.0, so it is surfaced on its own and does not affect the overall health score.
Manageable file sizes — 0/22 source files over 60KB
Inputs used
primary_language
Go
largest_source_bytes
32,797
source_files_sampled
22
oversized_source_files
0
Key facts
467GitHub stars
14contributors
21commits, last 12 months
17days since last push
7releases
2bus factor
6open issues
Gopackage ecosystems
Data collection warnings
Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token
More detail
Star and fork history 0 ★ / 66 ⇿
0Stars
66Forks
6Releases
When each star and fork was added, collected from GitHub and bucketed by day. Cumulative growth sits directly above the daily additions it is made of, so the two read against each other: steady organic accretion looks nothing like an abrupt, short-lived burst. Where that difference is measurable, it is reported as growth authenticity.
Major 1Minor 2Patch 3
Each point covers 11 days.
OpenSSF Scorecard 6.0 / 10
6.0aggregate
Independent, tool-agnostic security assessment from the open-source OpenSSF Scorecard. Each check rewards a security practice, not a specific vendor's tool. Checks Scorecard could not determine are marked n/a and excluded from the security score (never counted as zero).Scorecard v5.5.0 · 2026-07-25 07:52 UTC
Full resolved dependency set from the GitHub dependency graph: 3 direct and 6 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.
Registry
Package
Version
Relation
Go
github.com/google/go-cmp
0.7.0
direct
Go
github.com/stretchr/testify
1.11.1
direct
Go
gonum.org/v1/gonum
0.16.0
direct
Go
github.com/davecgh/go-spew
1.1.1
indirect
Go
github.com/kr/pretty
0.3.1
indirect
Go
github.com/pmezard/go-difflib
1.0.0
indirect
Go
github.com/rogpeppe/go-internal
1.14.1
indirect
Go
gopkg.in/check.v1
1.0.0-20201130134442-10cb98267c6c
indirect
Go
gopkg.in/yaml.v3
3.0.1
indirect
Dependency advisories 0
This repository publishes no package the index resolves, so its own dependency graph was assessed — 9 packages, which also include development and test pins that never ship: 0 carry known advisories, of which 0 are direct.
No known advisories affect the assessed dependencies.
An advisory means the version recorded in the dependency graph falls inside an advisory’s affected range. Reachability is not analysed, and the graph includes development and test pins — a finding may concern tooling rather than shipped software.
Raw JSON report machine-readable
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"pushed_at": "2026-07-07T13:04:24Z",
"created_at": "2014-07-14T00:27:16Z",
"owner_type": "Organization",
"updated_at": "2026-07-04T12:34:10Z",
"description": "A pure Go implementation of Gil Tene's HDR Histogram.",
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"activity": {
"releases": [
{
"tag": "v1.3.0",
"kind": "minor",
"published_at": "2026-07-07T13:04:25Z"
},
{
"tag": "v1.2.0",
"kind": "minor",
"published_at": "2025-11-10T00:00:02Z"
},
{
"tag": "v1.1.2",
"kind": "patch",
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},
{
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"kind": "patch",
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{
"tag": "v1.0.0",
"kind": "major",
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],
"recent_commits": [
{
"oid": "0500d8c71ec849a63147b0703f7932fbe04b79d7",
"body": "…-time casing (#66)\n\n* fix silent correctness/interop bugs: Mean overflow, offset, base-time casing\n\nThree defects surfaced by a deep audit, each with a regression test:\n\n- Mean() computed the int64 product count*value BEFORE the float64 cast, so large\n counts/values (product > ~9.2e18) wrapped and\n[…]\npended on TZ (e.g. failing under\nTZ=America/Santo_Domingo where 1000ms since epoch renders as the previous local date).\nFormat in UTC for a stable, timezone-independent line. Regression test included.",
"is_bot": false,
"headline": "fix silent correctness/interop bugs: Mean overflow, wire offset, base…",
"author_name": "Filipe Oliveira (Redis)",
"author_login": "fcostaoliveira",
"committed_at": "2026-07-04T12:34:05Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "cda93cfebafea917e7c947c3adff2f497441ce46",
"body": "…ross all APIs (#68)\n\n* percentile: reach at least the first recorded entry across all three APIs\n\nApply the reference max(countAtPercentile, 1) rule to ValueAtPercentile,\nValueAtPercentiles, and ValueAtPercentilesSlice together. Without it, low percentiles\nof a small histogram round the target coun\n[…]\na negative percentile\nwhile ValueAtPercentile / ValueAtPercentiles return its lowest-equivalent\n(the 0th percentile). Asserts single == map == slice for -1/-0.0001/-100\non New(1,...) and New(100,...).",
"is_bot": false,
"headline": "percentile: reach the first recorded entry (0th percentile == min) ac…",
"author_name": "Filipe Oliveira (Redis)",
"author_login": "fcostaoliveira",
"committed_at": "2026-07-04T12:33:53Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "a62267c371b8c19732c43cd9021e6bea3df304be",
"body": "bufio.Reader.ReadString returns the buffered final line together with\nio.EOF. decodeNextIntervalHistogram broke immediately on io.EOF, so an\ninterval line without a trailing newline was silently dropped. Process\nthe buffered line before terminating; the follow-up read returns\n(\"\", io.EOF) and ends t\n[…]\nds TestHistogramLogReader_finalLineNoTrailingNewline: writes 3\nintervals, strips the trailing newline, and asserts all 3 are still\nread and the last decodes identically to the newline-terminated read.",
"is_bot": false,
"headline": "fix(log): decode final interval line lacking a trailing newline (#72)",
"author_name": "Filipe Oliveira (Redis)",
"author_login": "fcostaoliveira",
"committed_at": "2026-07-04T09:40:30Z",
"body_truncated": true,
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{
"oid": "112d1637bfe1cbedf9cbe597bfc9cab7eb726e3a",
"body": "RecordValues(v, n) with n < 0 silently ran counts[idx] += n and\ntotalCount += n, driving both negative and corrupting every subsequent\npercentile/mean/distribution query (e.g. RecordValues(50, -5) on a\nhistogram holding one sample leaves TotalCount == -4).\n\nReject a negative n with an error, consist\n[…]\n. The check is a\npredicted-not-taken branch on the write hot path with no measurable\nthroughput impact (BenchmarkHistogramRecordValue ~3.2 ns/op unchanged).\n\nAdds TestRecordValuesRejectsNegativeCount.",
"is_bot": false,
"headline": "fix: reject a negative count in RecordValues (#74)",
"author_name": "Filipe Oliveira (Redis)",
"author_login": "fcostaoliveira",
"committed_at": "2026-07-04T08:11:00Z",
"body_truncated": true,
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{
"oid": "1639bc976872212c4b1a70cf06311d563a7b529e",
"body": "TestHistogramLogReader_logV2 and _tagged_log previously asserted only\nerr==nil and NotNil per interval, and under-drained the jHiccup fixture\n(61 of 62 intervals). Pin interval 0's decoded contents (TotalCount,\nStart/EndTimeMs, Max, p50, p99) and assert the full drained interval\ncount (62 and 42), so a regression in the reader or the V2 decoder is\ncaught rather than silently returning a wrong-but-non-nil histogram.\n\nTest-only; no source change.",
"is_bot": false,
"headline": "test(log): pin golden values for the logV2 reader fixtures (#73)",
"author_name": "Filipe Oliveira (Redis)",
"author_login": "fcostaoliveira",
"committed_at": "2026-07-04T08:10:16Z",
"body_truncated": false,
"is_coding_agent": false
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{
"oid": "3c4a3c10c8935b4b7dadb8d66f8ae2b6ed33febb",
"body": "Two ValueAtPercentile benchmarks ran a loop 'for i := range make([]float64, b.N) {\ndata[i] = rand.Float64()*100 }' that (a) filled data (unused) instead of the intended\nquantiles, and (b) indexed a fixed 1e6-element slice b.N times, panicking with index\nout of range once b.N exceeded 1e6 (e.g. go test -bench . -benchtime=2000000x). The\nloop was dead — the benchmarks query a fixed percentile set — so remove it and drop the\nunused slices. Now runs at b.N=2e6+ cleanly.",
"is_bot": false,
"headline": "bench: remove dead fill loop that panics for b.N > 1e6 (#70)",
"author_name": "Filipe Oliveira (Redis)",
"author_login": "fcostaoliveira",
"committed_at": "2026-07-04T08:09:48Z",
"body_truncated": false,
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{
"oid": "a3c9d0bbca96639e3f8f54d8abb4bf6cf54a9955",
"body": "…ed-value + merge edges (#71)\n\nTest-only additions lifting coverage 85.9% -> 87.8% on risk-bearing paths that had none:\n- TestZigZagAllByteLengths: every 1..9-byte rung of the LEB128 encoder + round-trip\n (zig_zag_encode_i64 now 100%).\n- TestNewMaxRangeOverflowGuard: New(1, MaxInt64, 3) exercises g\n[…]\nerror path for an out-of-range corrected value.\n- TestMergeReportsDropped: Merge returns the count dropped when the destination range is\n narrower than the source (Merge now 100%).\nNo source changes.",
"is_bot": false,
"headline": "test: cover zigzag byte-length ladder, bucket overflow guard, correct…",
"author_name": "Filipe Oliveira (Redis)",
"author_login": "fcostaoliveira",
"committed_at": "2026-07-04T08:09:39Z",
"body_truncated": true,
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{
"oid": "1e77ae969583e5219016120015bd45ae94c04ac5",
"body": "Reset is documented to restore the histogram to its original state, but it only zeroed\ntotalCount and counts[], leaving a stale tag/startTimeMs/endTimeMs from a previous\ninterval. Clear them too (matching New()'s initialization). Regression test included.",
"is_bot": false,
"headline": "Reset: clear tag and start/end time, not just counts (#69)",
"author_name": "Filipe Oliveira (Redis)",
"author_login": "fcostaoliveira",
"committed_at": "2026-07-04T08:09:06Z",
"body_truncated": false,
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},
{
"oid": "c1a9402207a8a9d8c06df0a6ad19388784b7a240",
"body": "… (#65)\n\n* harden Decode/log-reader against malformed input + add native fuzzing\n\nA deep audit (and now these fuzz targets) found the public Decode() and interval-log\nreader panic on malformed/untrusted input. Decode ingests base64/zlib bytes from log\nfiles and the network, so these are remote-DoS-c\n[…]\ngeMetamorphic: Merge two histograms — no panic, count conservation, invariants.\n\nWired all four into the ClusterFuzzLite build and the fuzz-smoke CI matrix. Each runs\nclean for millions of executions.",
"is_bot": false,
"headline": "harden Decode/log-reader against malformed input + add native fuzzing…",
"author_name": "Filipe Oliveira (Redis)",
"author_login": "fcostaoliveira",
"committed_at": "2026-07-04T08:08:36Z",
"body_truncated": true,
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},
{
"oid": "8d7857520556c93d38b1bfb13bd1f590241ddd2a",
"body": "…lamp, map phantom key (#67)\n\n* fix percentile clamping contracts: negative clamp + map phantom key\n\nTwo edge-case contract bugs in the percentile APIs (the class @dkropachev found in\nValueAtPercentilesSlice), making the three variants consistent:\n\n- ValueAtPercentile clamped only >100, not <0. A ne\n[…]\ne histogram stay within [Min, Max] for both APIs.\n\n* Revert \"percentile: reach at least the first recorded entry (0th percentile == min)\"\n\nThis reverts commit 1b895ea211776e82d360c0ca050922311814c95d.",
"is_bot": false,
"headline": "fix percentile edge-case contracts: empty histogram (#60), negative c…",
"author_name": "Filipe Oliveira (Redis)",
"author_login": "fcostaoliveira",
"committed_at": "2026-07-04T08:08:24Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "b00adb186cf858069a092aa39e0a4608b6324f72",
"body": "…eck elision (+5%) (#64)\n\n* perf: blocked prefix-sum skip-scan + write-path bounds-check elision\n\nRead path (getValueFromIdxUpToCount): sum counts[] in blocks of 8 with independent\naccumulators (no loop-carried dependency, one branch per block), skipping whole\nblocks that cannot reach the target and\n[…]\nto 0 when building the targets, and take the lowest-equivalent branch for any\npercentile <= 0. Adds a regression test over New(100, ...) asserting negative/zero\npercentiles equal ValueAtPercentile(0).",
"is_bot": false,
"headline": "perf: blocked prefix-sum skip-scan (+50% read) + write-path bounds-ch…",
"author_name": "Filipe Oliveira (Redis)",
"author_login": "fcostaoliveira",
"committed_at": "2026-07-03T12:58:53Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "ebe230317761c0d1fbd1b2e41a2f531f6827173b",
"body": "…cks (#62)\n\ngetValueFromIdxUpToCount (ValueAtPercentile) and the ValueAtPercentiles batch scan iterated\nwith an int index and read counts[idx], which Go bounds-checks every element. Iterating with\n'for idx, c := range h.counts' provides the element directly (len==countsLen), so the compiler\nelides the per-element bounds check on the hot prefix-sum loop. Results unchanged.\n\nCo-authored-by: Filipe Oliveira <oly@codeperf.io>",
"is_bot": false,
"headline": "perf: range over counts[] in the percentile scans to elide bounds che…",
"author_name": "Filipe Oliveira (Redis)",
"author_login": "fcostaoliveira",
"committed_at": "2026-07-03T09:03:36Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "6b5dd0d3cca2b2619b2dd9280fef363d73e97eb7",
"body": "…rder (#63)\n\nAdd a batch percentile query that writes to a []int64 in input order instead of allocating a\nmap[float64]int64 and hashing float64 keys per call. Resolves in ascending target order via a\npermutation (input order + duplicates preserved), tight hoisted-target range-loop scan, no input\nmutation. Same values as ValueAtPercentiles/ValueAtPercentile (verified across unsorted/dup/empty/\np0/p100).\n\nCo-authored-by: Filipe Oliveira <oly@codeperf.io>",
"is_bot": false,
"headline": "feat: ValueAtPercentilesSlice — []int64 batch (no map alloc), input o…",
"author_name": "Filipe Oliveira (Redis)",
"author_login": "fcostaoliveira",
"committed_at": "2026-07-03T09:03:15Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "22a1b78b53d2dff44368b7bca4d11c59f58e8b57",
"body": "* perf: flat counts[] scan in getValueFromIdxUpToCount (ValueAtPercentile)\n\ngetValueFromIdxUpToCount walked the logical bucket/sub-bucket structure, recomputing\nsubBucketIdx/bucketIdx and the value on every element. The walk visits exactly the flat\ncounts[] indices in order, so replace it with a tig\n[…]\n loop in getValueFromIdxUpToCount that the flat-scan\nchange replaced; leaving it defined trips golangci-lint's unused (U1000) and reds CI.\n\n---------\n\nCo-authored-by: Filipe Oliveira <oly@codeperf.io>",
"is_bot": false,
"headline": "perf: flat counts[] scan in ValueAtPercentile (+133%) (#57)",
"author_name": "Filipe Oliveira (Redis)",
"author_login": "fcostaoliveira",
"committed_at": "2026-07-02T19:59:22Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "bbda977987daf8ea6f7d1294cdc6231df5676d18",
"body": "* perf: flat counts[] scan in getValueFromIdxUpToCount (ValueAtPercentile)\n\ngetValueFromIdxUpToCount walked the logical bucket/sub-bucket structure, recomputing\nsubBucketIdx/bucketIdx and the value on every element. The walk visits exactly the flat\ncounts[] indices in order, so replace it with a tig\n[…]\nead of the documented 0's. Restore the contract with an explicit totalCount==0 guard;\nadd a regression test with lowestDiscernibleValue>1.\n\n---------\n\nCo-authored-by: Filipe Oliveira <oly@codeperf.io>",
"is_bot": false,
"headline": "perf: flat counts[] scan in ValueAtPercentiles (batch, +303%) (#58)",
"author_name": "Filipe Oliveira (Redis)",
"author_login": "fcostaoliveira",
"committed_at": "2026-07-02T19:59:04Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "37ca6172913d82d58c1fa449bcd3ca3d81080117",
"body": "Replace 'idx < 0 || int(h.countsLen) <= idx' with 'uint(idx) >= uint(h.countsLen)':\na negative idx wraps to a large unsigned value and is caught by the same bound, so one\nunsigned comparison replaces two signed ones on the record hot path. (Port of the C\nHdrHistogram_c #136 change.)\n\nCo-authored-by: Filipe Oliveira <oly@codeperf.io>",
"is_bot": false,
"headline": "perf: single unsigned bounds check in RecordValues (#59)",
"author_name": "Filipe Oliveira (Redis)",
"author_login": "fcostaoliveira",
"committed_at": "2026-07-02T13:27:10Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "b2087ec37ab3239ce1edfb9c2a1282fd2be259ab",
"body": "Co-authored-by: Ben Morgan <neembi@gmail.com>",
"is_bot": false,
"headline": "Make it harder for Mean() and StdDev() to overflow (#21)",
"author_name": "Ben Morgan",
"author_login": "cassava",
"committed_at": "2026-07-02T12:27:31Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "7de3c9914a362c151894c1f83023a0e6e7c4f6ac",
"body": "* Fix HistogramLogWriter.OutputStartTime\n\nIt should multiply it by 1e6 not 1e9\n\n* Only triggering fmt when needed\n\n* reverted make changes\n\n* Only triggering fmt when needed\n\n---------\n\nCo-authored-by: fcostaoliveira <filipe@redis.com>",
"is_bot": false,
"headline": "Fix HistogramLogWriter.OutputStartTime nanosecond conversion (#54)",
"author_name": "Dmitry Kropachev",
"author_login": "dkropachev",
"committed_at": "2025-11-09T23:49:37Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "375461c446662ce3e571c7a54dc16f4d272b5f79",
"body": "* Update golang to 1.23\n\n* Download concrete version of golangci\n\ngolangci is hard to compile now.\nLet's just download it and use concrete version of it.\n\n* Address linter complaints\n\n* Updated both lint and fmt targets to use the full path to golangci-lint\n\n* explicit toolchain go1.23.0\n\n* use Download concrete version of golangci codeblock from dkropachev. fixed identiefied missing linter issue\n\n---------\n\nCo-authored-by: fcostaoliveira <filipe@redis.com>",
"is_bot": false,
"headline": "Update to Go 1.23, modernize dependencies, and fix linter issues (#55)",
"author_name": "Dmitry Kropachev",
"author_login": "dkropachev",
"committed_at": "2025-11-09T23:30:05Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "c035224a1ba7982e1a7ea1469f35bc31d47514af",
"body": "Fixes two bugs in the histogram log writer's timestamp handling:\n\n Incorrect time unit: Start time and interval were written in milliseconds instead of seconds\n Wrong field: End time was written instead of interval duration\n\nThis PR adds test coverage to verify that StartTimeMs and EndTimeMs are correctly preserved during histogram serialization and deserialization.\n\n\nCo-authored-by: fcostaoliveira <filipe@redis.com>",
"is_bot": false,
"headline": "[fix] Log writer writes time wrong (#51)",
"author_name": "Dmitry Kropachev",
"author_login": "dkropachev",
"committed_at": "2025-11-09T22:26:52Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "474b196fd6dc24f6bc303ab8de9cba97a0112d58",
"body": "Update Go version from 1.14 to 1.21 and fix CI build failures caused by\nincompatible golangci-lint version requirements.\n\nChanges:\n\n Update go.mod to Go 1.21 (from 1.14)\n Pin golangci-lint to v1.59.0 (compatible with Go 1.21)\n Replace deprecated io/ioutil with io and os packages (Go 1.19+ r\n[…]\nng code\n\nGithub actions version change:\n\n actions/setup-go -> v6\n actions/checkout -> v5\n codecov/codecov-action -> v4\n release-drafter/release-drafter -> v5\n github/codeql-action -> v4",
"is_bot": false,
"headline": "Modernize Go toolchain and CI GH actions (#53)",
"author_name": "Dmitry Kropachev",
"author_login": "dkropachev",
"committed_at": "2025-11-09T22:19:34Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "494271c4c016b36c8cee88480288f33b419cf7b0",
"body": "`ValueAtPercentile()` 4.5X on-cpu time optimization: remove expensive condition checks and re-use computation on hotpaths",
"is_bot": false,
"headline": "Merge pull request #48 from HdrHistogram/percentile.opt",
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"body": "* [add] V2 HdrHistogram Log format (v1.3)\r\n\r\n* [fix] Added nolint to the examples\r\n\r\n* [fix] Fixed error message typo on minimum length on bytes for 7,8,and 9 bytelen\r\n\r\n* [fix] Fixed ExampleHistogram_PercentilesPrint",
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"headline": "V2 HdrHistogram Log format (v1.3) (#35)",
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"body": "* [wip] Wip on enabling output textual percentile distribution\r\n\r\n* [add] Added example for printing of the percentile output format\r\n\r\n* [add] printing +Inf within Inverted Percentile in the same format as the Java implementation",
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"headline": "Enable percentile output format (#38)",
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"body": "The caller expects the snapshot to be their own, but the previous\ncode was passing out the internal state, which meant all uses of\nthe method were inherently racy.",
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"headline": "Make a copy in Histogram export",
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"headline": "Update Travis config.",
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"body": "Expose various constants used to create the histogram",
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"body": "When embedding Histogram, it is useful to expose the constants used to create the histogram so that a histogram manager does not have to store duplicate copies of these values.",
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"headline": "Expose various constants used to create the histogram",
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"body": "Catchup",
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"headline": "Update to master",
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"oid": "9e41cc93350bb6167c59cb3d69269693007ffa78",
"body": "# Conflicts:\n#\thdr_test.go",
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"headline": "Fixed line wrap",
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"body": "Max bugfix",
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"headline": "Merge pull request #15 from adrianco/master",
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{
"oid": "110fb3762de3a01850603d7d4f3505da8280f586",
"body": "Since max value in histogram is 999999 it’s wrong to return lower bound\nof bucket=999936 as max value estimate, 1000447 is upper bound of\nbucket and is greater than 999999.",
"is_bot": false,
"headline": "Fixed test of max",
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"headline": "Max bugfix",
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"body": "prevent Mean and StdDev from being NaN",
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"headline": "Merge pull request #12 from toffaletti/master",
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"headline": "prevent Mean and StdDev from being NaN",
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"body": "Add an exported TotalCount method to Histogram",
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{
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"has_readme": true,
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"has_description": true
},
"components": [
{
"key": "readme",
"name": "README",
"detail": null,
"points": 30,
"status": "met",
"details": [],
"max_points": 30
},
{
"key": "documentation_directory",
"name": "Documentation directory",
"detail": null,
"points": 0,
"status": "missed",
"details": [],
"max_points": 25
},
{
"key": "documentation_homepage_site",
"name": "Documentation / homepage site",
"detail": null,
"points": 0,
"status": "missed",
"details": [],
"max_points": 15
},
{
"key": "repository_description",
"name": "Repository description",
"detail": null,
"points": 10,
"status": "met",
"details": [],
"max_points": 10
},
{
"key": "topics",
"name": "Topics",
"detail": null,
"points": 0,
"status": "missed",
"details": [],
"max_points": 10
},
{
"key": "wiki",
"name": "Wiki",
"detail": null,
"points": 10,
"status": "met",
"details": [],
"max_points": 10
}
]
}
],
"description": "Are baseline engineering and documentation practices in place?"
},
{
"key": "security",
"band": "moderate",
"name": "Security",
"value": 68,
"weight": 0.16,
"metrics": [
{
"key": "security_posture",
"band": "moderate",
"name": "Security posture",
"note": "Excluded from scoring (no data or not applicable): Packaging, Signed-Releases. Remaining weights renormalized.",
"notes": [
{
"code": "excluded_no_data",
"params": {
"components": [
"packaging",
"signed_releases"
]
}
},
{
"code": "weights_renormalized",
"params": {}
}
],
"value": 60,
"inputs": {
"source": "openssf_scorecard",
"checks_evaluated": 16,
"scorecard_version": "v5.5.0",
"checks_inconclusive": 2,
"scorecard_aggregate": 6
},
"components": [
{
"key": "binary_artifacts",
"name": "Binary-Artifacts",
"detail": "binaries present in source code",
"points": 6.8,
"status": "partial",
"details": [],
"max_points": 7.5
},
{
"key": "branch_protection",
"name": "Branch-Protection",
"detail": "branch protection not enabled on development/release branches",
"points": 0,
"status": "missed",
"details": [],
"max_points": 7.5
},
{
"key": "ci_tests",
"name": "CI-Tests",
"detail": "20 out of 23 merged PRs checked by a CI test -- score normalized to 8",
"points": 2,
"status": "partial",
"details": [],
"max_points": 2.5
},
{
"key": "cii_best_practices",
"name": "CII-Best-Practices",
"detail": "no effort to earn an OpenSSF best practices badge detected",
"points": 0,
"status": "missed",
"details": [],
"max_points": 2.5
},
{
"key": "code_review",
"name": "Code-Review",
"detail": "all changesets reviewed",
"points": 7.5,
"status": "met",
"details": [],
"max_points": 7.5
},
{
"key": "contributors",
"name": "Contributors",
"detail": "project has 9 contributing companies or organizations",
"points": 2.5,
"status": "met",
"details": [],
"max_points": 2.5
},
{
"key": "dangerous_workflow",
"name": "Dangerous-Workflow",
"detail": "no dangerous workflow patterns detected",
"points": 10,
"status": "met",
"details": [],
"max_points": 10
},
{
"key": "dependency_update_tool",
"name": "Dependency-Update-Tool",
"detail": "no update tool detected",
"points": 0,
"status": "missed",
"details": [],
"max_points": 7.5
},
{
"key": "fuzzing",
"name": "Fuzzing",
"detail": "project is fuzzed",
"points": 5,
"status": "met",
"details": [],
"max_points": 5
},
{
"key": "license",
"name": "License",
"detail": "license file detected",
"points": 2.5,
"status": "met",
"details": [],
"max_points": 2.5
},
{
"key": "maintained",
"name": "Maintained",
"detail": "17 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 10",
"points": 7.5,
"status": "met",
"details": [],
"max_points": 7.5
},
{
"key": "packaging",
"name": "Packaging",
"detail": "packaging workflow not detected",
"points": 0,
"status": "excluded",
"details": [
{
"code": "no_data",
"params": {}
}
],
"max_points": 5
},
{
"key": "pinned_dependencies",
"name": "Pinned-Dependencies",
"detail": "dependency not pinned by hash detected -- score normalized to 0",
"points": 0,
"status": "missed",
"details": [],
"max_points": 5
},
{
"key": "sast",
"name": "SAST",
"detail": "SAST tool detected but not run on all commits",
"points": 4,
"status": "partial",
"details": [],
"max_points": 5
},
{
"key": "security_policy",
"name": "Security-Policy",
"detail": "security policy file not detected",
"points": 0,
"status": "missed",
"details": [],
"max_points": 5
},
{
"key": "signed_releases",
"name": "Signed-Releases",
"detail": "no releases found",
"points": 0,
"status": "excluded",
"details": [
{
"code": "no_data",
"params": {}
}
],
"max_points": 7.5
},
{
"key": "token_permissions",
"name": "Token-Permissions",
"detail": "detected GitHub workflow tokens with excessive permissions",
"points": 0,
"status": "missed",
"details": [],
"max_points": 7.5
},
{
"key": "vulnerabilities",
"name": "Vulnerabilities",
"detail": "0 existing vulnerabilities detected",
"points": 7.5,
"status": "met",
"details": [],
"max_points": 7.5
}
]
},
{
"key": "dependency_advisories",
"band": "excellent",
"name": "Dependency advisories",
"note": "Excluded from scoring (no data or not applicable): Indirect dependencies free of known advisories, No advisories left outstanding. Remaining weights renormalized. Matched 9 resolved dependencies against OSV. This repository publishes no package the index resolves, so the repository dependency graph was assessed instead. That graph mixes development and test pins with shipped dependencies, so only the declared runtime dependencies are scored; transitive findings are reported as context and excluded from the score. Reachability is not analyzed.",
"notes": [
{
"code": "excluded_no_data",
"params": {
"components": [
"indirect_dependencies_free_of_known_advisories",
"no_advisories_left_outstanding"
]
}
},
{
"code": "weights_renormalized",
"params": {}
},
{
"code": "advisories_scope_repository",
"params": {
"assessed": 9
}
},
{
"code": "advisories_repo_graph_caveat",
"params": {}
},
{
"code": "advisories_reachability",
"params": {}
}
],
"value": 100,
"inputs": {
"source": "osv",
"advisories": 0,
"affected_packages": 0,
"assessed_packages": 9,
"unassessed_packages": 0,
"affected_by_severity": "none",
"direct_affected_packages": 0
},
"components": [
{
"key": "direct_dependencies_free_of_known_advisories",
"name": "Direct dependencies free of known advisories",
"detail": "no direct dependency carries a known advisory",
"points": 35,
"status": "met",
"details": [
{
"code": "no_direct_advisories",
"params": {}
}
],
"max_points": 35
},
{
"key": "indirect_dependencies_free_of_known_advisories",
"name": "Indirect dependencies free of known advisories",
"detail": "transitive set not separable from development and test dependencies in this scope",
"points": 0,
"status": "excluded",
"details": [
{
"code": "advisories_scope_not_separable",
"params": {}
}
],
"max_points": 25
},
{
"key": "no_advisories_left_outstanding",
"name": "No advisories left outstanding",
"detail": "no advisory carries a publication date",
"points": 0,
"status": "excluded",
"details": [
{
"code": "advisories_no_publication_date",
"params": {}
}
],
"max_points": 40
}
]
},
{
"key": "malicious_dependencies",
"band": "excellent",
"name": "Malicious dependencies",
"note": null,
"notes": [],
"value": 100,
"inputs": {
"source": "osv",
"meaning": "reported as a malicious package by the OpenSSF corpus; the remedy is removal or moving off the compromised name, never an upgrade of the same artifact. Versions the registry has since pulled are listed but not scored",
"packages": [],
"red_flag": false,
"assessed_packages": 9,
"malicious_packages": 0,
"direct_malicious_packages": 0,
"withdrawn_malicious_packages": 0,
"installable_malicious_packages": 0
},
"components": [
{
"key": "no_dependency_reported_as_a_malicious_package",
"name": "No dependency reported as a malicious package",
"detail": "no dependency is reported as a malicious package",
"points": 100,
"status": "met",
"details": [
{
"code": "no_malicious_dependencies",
"params": {}
}
],
"max_points": 100
}
]
},
{
"key": "high_risk_jurisdiction_exposure",
"band": "excellent",
"name": "High-Risk Jurisdiction Exposure",
"note": "Only high-confidence self-published location evidence affects this multiplier. Ambiguous matches are review-only; country evidence is not proof of nationality, citizenship, legal registration, malicious intent, or sanctions status.",
"notes": [
{
"code": "jurisdiction_evidence_limits",
"params": {}
}
],
"value": 100,
"inputs": {
"meaning": "self-published location evidence; not nationality or citizenship",
"red_flag": false,
"exposures": [],
"policy_countries": [
"Russia",
"Iran",
"North Korea"
],
"review_only_matches": 0,
"assessed_self_published_locations": 13
},
"components": [
{
"key": "policy_exposure_multiplier",
"name": "Policy exposure multiplier",
"detail": "no confirmed policy-scope location match",
"points": 100,
"status": "met",
"details": [
{
"code": "jurisdiction_no_match",
"params": {}
}
],
"max_points": 100
}
]
}
],
"description": "Are visible security and supply-chain practices strong, with no malicious dependency and no unresolved high-risk jurisdiction exposure?"
},
{
"key": "ai_readiness",
"band": "moderate",
"name": "AI Readiness",
"value": 56,
"weight": 0,
"metrics": [
{
"key": "ai_agent_context",
"band": "critical",
"name": "Agent context & guidance",
"note": null,
"notes": [],
"value": 27,
"inputs": {
"has_llms_txt": false,
"legible_history_share": 0.51,
"agent_instruction_files": [],
"agent_instruction_max_bytes": null
},
"components": [
{
"key": "agent_instructions",
"name": "Agent instructions",
"detail": "no CLAUDE.md / AGENTS.md / editor rules",
"points": 0,
"status": "missed",
"details": [
{
"code": "no_agent_instructions",
"params": {}
}
],
"max_points": 45
},
{
"key": "machine_readable_docs_llms_txt",
"name": "Machine-readable docs (llms.txt)",
"detail": null,
"points": 0,
"status": "missed",
"details": [],
"max_points": 15
},
{
"key": "legible_commit_history",
"name": "Legible commit history",
"detail": "51 of 100 human commits state their intent (structured subject or explanatory body)",
"points": 27.2,
"status": "partial",
"details": [
{
"code": "legible_history",
"params": {
"legible": 51,
"sampled": 100
}
}
],
"max_points": 40
}
]
},
{
"key": "ai_verify_loop",
"band": "moderate",
"name": "Verify loop (build / test / typecheck)",
"note": null,
"notes": [],
"value": 61,
"inputs": {
"has_nix": false,
"has_tests": true,
"lockfiles": [
"go.sum"
],
"has_dockerfile": true,
"typed_language": true,
"bootstrap_files": [
"Makefile"
],
"has_devcontainer": false,
"has_linter_config": false,
"typecheck_configs": [],
"agent_commit_share": 0,
"toolchain_manifests": [
"go.mod"
],
"dependency_bot_commit_share": 0
},
"components": [
{
"key": "one_command_bootstrap",
"name": "One-command bootstrap",
"detail": "Makefile",
"points": 18,
"status": "met",
"details": [
{
"code": "file_list",
"params": {
"files": "Makefile"
}
}
],
"max_points": 18
},
{
"key": "automated_tests",
"name": "Automated tests",
"detail": null,
"points": 22,
"status": "met",
"details": [],
"max_points": 22
},
{
"key": "lint_format_config",
"name": "Lint / format config",
"detail": null,
"points": 0,
"status": "missed",
"details": [],
"max_points": 11
},
{
"key": "static_type_checking",
"name": "Static type checking",
"detail": "Go (statically typed)",
"points": 11,
"status": "met",
"details": [
{
"code": "statically_typed_language",
"params": {
"language": "Go"
}
}
],
"max_points": 11
},
{
"key": "reproducible_environment",
"name": "Reproducible environment",
"detail": "Dockerfile, lockfile",
"points": 10,
"status": "met",
"details": [
{
"code": "file_list",
"params": {
"files": "Dockerfile, lockfile"
}
}
],
"max_points": 10
},
{
"key": "demonstrated_agent_practice",
"name": "Demonstrated agent practice",
"detail": "no agent-authored commits among the last 100",
"points": 0,
"status": "missed",
"details": [
{
"code": "no_agent_authored_commits",
"params": {
"sampled": 100
}
}
],
"max_points": 10
},
{
"key": "automated_maintenance",
"name": "Automated maintenance",
"detail": "no automated dependency updates observed",
"points": 0,
"status": "missed",
"details": [
{
"code": "no_dependency_automation",
"params": {}
}
],
"max_points": 8
},
{
"key": "openssf_scorecard_pinned_dependencies",
"name": "OpenSSF Scorecard: Pinned-Dependencies",
"detail": "dependency not pinned by hash detected -- score normalized to 0",
"points": 0,
"status": "missed",
"details": [],
"max_points": 10
}
]
},
{
"key": "ai_code_legibility",
"band": "excellent",
"name": "Code legibility for models",
"note": null,
"notes": [],
"value": 100,
"inputs": {
"primary_language": "Go",
"largest_source_bytes": 32797,
"source_files_sampled": 22,
"oversized_source_files": 0
},
"components": [
{
"key": "type_checkable_code",
"name": "Type-checkable code",
"detail": "Go (statically typed)",
"points": 45,
"status": "met",
"details": [
{
"code": "statically_typed_language",
"params": {
"language": "Go"
}
}
],
"max_points": 45
},
{
"key": "manageable_file_sizes",
"name": "Manageable file sizes",
"detail": "0/22 source files over 60KB",
"points": 55,
"status": "met",
"details": [
{
"code": "oversized_source_files",
"params": {
"kb": 60,
"sampled": 22,
"oversized": 0
}
}
],
"max_points": 55
}
]
}
],
"description": "How well is the repo equipped to be developed and maintained with AI coding agents? An independent, experimental badge — weight 0.0, so it is surfaced on its own and does not affect the overall health score."
}
],
"metrics_version": "1.13.0"
},
"warnings": [
"Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token"
],
"report_type": "repository",
"generated_at": "2026-07-25T07:52:31.015606Z",
"schema_version": "0.27.0",
"badge_url": "https://raw.githubusercontent.com/inspect-software/badges/main/v1/h/HdrHistogram/hdrhistogram-go.svg",
"full_name": "HdrHistogram/hdrhistogram-go",
"license_state": "standard",
"license_spdx": "MIT"
}
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Scores are signals, not warranties. They reflect publicly visible practices on GitHub — not a code audit, and not a security guarantee.
Missing data is excluded and weights renormalized, never scored as zero. Methodology is versioned and open: metrics v1.13.0, schema v0.27.0 — full methodology · metrics wiki.
