The Snappy compression format in the Go programming language.
Go · AssemblyBSD-3-Clause★ 1569 estrellas⑂ 168 forksdesde may 2015Ver en GitHub ↗
golang/snappy tiene un índice de salud de 48 sobre 100, lo que lo sitúa en la banda En riesgo. Su puntuación más alta es Community & Adoption (66/100) y la más baja, Engineering Quality (30/100). Se actualizó por última vez hace 12 días. Una sola persona concentra la mayor parte del trabajo reciente.
48
global / 100
En riesgo
Índice de salud del software
Las métricas se agrupan en categorías ponderadas sobre una escala de 1 a 100. El resultado global parte de su media; cuando la evidencia pública activa la Política de Jurisdicciones de Alto Riesgo, la calificación se ajusta y recibe el límite 49 (En riesgo). Preparación para IA queda fuera.
48
Excelente85-100Ejemplar; cumple prácticamente todos los criterios evaluados
Bueno70-84Saludable; carencias menores
Moderado50-69Aceptable con carencias notables; se recomienda revisión
En riesgo30-49Debilidades significativas; su adopción exige cautela
Crítico1-29Problemas graves (proyecto abandonado, un solo mantenedor, sin higiene)
Perfil de puntuación
Cada eje es una categoría. La forma importa más que la media: un proyecto sano llena toda la figura, mientras que un perfil de picos y cráteres indica que la fortaleza en una dimensión enmascara el riesgo en otra.
Excluidos de la puntuación (sin datos o no aplicable): branch_protection, dangerous_workflow, packaging, pinned_dependencies, signed_releases, token_permissions. Los pesos restantes se han renormalizado.
¿Hasta qué punto está el repositorio preparado para desarrollarse y mantenerse con agentes de codificación de IA? Es una insignia independiente y experimental — peso 0,0, de modo que se presenta por separado y no afecta a la puntuación de salud global.
Código verificable por tipos — Go (tipado estático)
55/55
Tamaños de archivo manejables — 0/11 archivos fuente de más de 60 KB
Datos de entrada utilizados
primary_language
Go
largest_source_bytes
45.089
source_files_sampled
11
oversized_source_files
0
Datos clave
1569estrellas de GitHub
16contribuidores
2commits en los últimos 12 meses
12días desde el último push
1versiones publicadas
1factor bus
13issues abiertas
Goecosistemas de paquetes
Advertencias de recopilación de datos
Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token
Más detalle
Historial de estrellas y forks 0 ★ / 168 ⇿
0Estrellas
168Forks
1Versiones
Cuándo se añadió cada estrella y fork, recopilado de GitHub y agrupado por día. El crecimiento acumulado se sitúa justo encima de las adiciones diarias que lo componen, de modo que ambos se leen en conjunto: la acumulación orgánica sostenida no se parece en nada a un pico abrupto y efímero. Cuando esa diferencia es medible, se informa como autenticidad del crecimiento.
Mayor 1Menor 0Parche 0
Cada punto abarca 11 días.
OpenSSF Scorecard 4.4 / 10
4.4agregado
Evaluación de seguridad independiente y agnóstica en cuanto a herramientas, procedente del proyecto de código abierto OpenSSF Scorecard. Cada comprobación premia una práctica de seguridad, no la herramienta de un proveedor concreto. Las comprobaciones que Scorecard no pudo determinar se marcan como n/d y se excluyen de la puntuación de seguridad (nunca se cuentan como cero).Scorecard v5.5.0 · 2026-07-28 13:24 UTC
Conjunto completo de dependencias resueltas según el grafo de dependencias de GitHub: 0 paquetes directos y 0 indirectos (transitivos). El cierre transitivo es completo cuando el repositorio incluye un lockfile.
Registro
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Relación
Avisos de dependencias sin evaluar
El cotejo de avisos no pudo ejecutarse para este informe: No resolved dependencies to assess
Informe JSON sin procesar legible por máquina
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"body": "Add a go.mod file for basic Go modules support.",
"is_bot": false,
"headline": "Merge pull request #46 from creachadair/gomod",
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"headline": "correct spelling mistake",
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"body": "fix typo",
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"headline": "Merge pull request #37 from fatedier/master",
"author_name": "Nigel Tao",
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"headline": "fix typo",
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"body": "Run gofmt.",
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"headline": "Merge pull request #36 from sguiheux/gofmt",
"author_name": "Nigel Tao",
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"headline": "fix: gofmt",
"author_name": "Steven Guiheux",
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"body": "It is a valid encoding, even if no longer issued by most encoders.\n\nname old speed new speed delta\nWordsDecode1e1-8 525MB/s ± 0% 504MB/s ± 1% -4.04% (p=0.000 n=9+10)\nWordsDecode1e2-8 1.23GB/s ± 0% 1.23GB/s ± 1% ~ (p=0.678 n=10+9)\nWordsDecode1e3-8 1.54GB/s ± 0\n[…]\n8MB/s ± 0% 327MB/s ± 1% ~ (p=0.409 n=8+9)\n_ZFlat10-8 1.33GB/s ± 0% 1.33GB/s ± 1% ~ (p=0.356 n=9+10)\n_ZFlat11-8 605MB/s ± 0% 605MB/s ± 1% ~ (p=0.743 n=9+8)",
"is_bot": false,
"headline": "Support the COPY_4 tag.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-05-29T05:00:41Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "d6668316e43571d7dde95be6fd077f96de002f8b",
"body": null,
"is_bot": false,
"headline": "Fix BenchmarkExtendMatch to honor the testdata flag.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-05-19T03:34:20Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "d7b1e156f50d3c4664f683603af70e3e47fa0aa2",
"body": null,
"is_bot": false,
"headline": "Add a benchdataDir flag.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-05-04T22:17:12Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "aefa7ba4ef3005262bc58a868df27fe6c7ff2359",
"body": "Some build environments need to specify their own testdata dir.",
"is_bot": false,
"headline": "Re-add the testdata flag.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-05-04T21:48:01Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "43fea289edce21979658cbbdb3925390890aa86e",
"body": "Fixes #32.",
"is_bot": false,
"headline": "Remove the snappy.test binary, inadvertently checked in.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-29T23:02:19Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "b62d312cd2a7474ccb7eb06a4686f0560e4ba7fb",
"body": null,
"is_bot": false,
"headline": "Add some benchmark numbers to the README.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-29T05:28:03Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "dfb3612ba2a044dad98f8b170d2f718467c30691",
"body": "Compared to the previous commit:\nname old speed new speed delta\nWordsEncode1e1-8 701MB/s ± 0% 699MB/s ± 1% ~ (p=0.123 n=10+10)\nWordsEncode1e2-8 460MB/s ± 0% 583MB/s ± 1% +26.64% (p=0.000 n=10+10)\nWordsEncode1e3-8 480MB/s ± 0% 647MB/s ± 2% +34.85% (p=0.0\n[…]\n/s ± 1% 329MB/s ± 0% +33.58% (p=0.000 n=10+9)\n_ZFlat10-8 1.05GB/s ± 1% 1.35GB/s ± 1% +28.35% (p=0.000 n=10+9)\n_ZFlat11-8 411MB/s ± 0% 608MB/s ± 0% +47.82% (p=0.000 n=10+9)",
"is_bot": false,
"headline": "Inline the extendMatch call.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-29T04:24:51Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "c707890a477a74edb4e53dde84613abf3ad29c5d",
"body": "This minimizes the diff in a follow-up commit, when manually inlining.\n\nIt's not an optimization per se, but for the record:\nname old speed new speed delta\nWordsEncode1e1-8 700MB/s ± 1% 701MB/s ± 0% ~ (p=0.393 n=10+10)\nWordsEncode1e2-8 460MB/s ± 1% 460MB/s ± 0% \n[…]\n new time/op delta\nExtendMatch-8 7.92µs ± 2% 7.80µs ± 2% -1.51% (p=0.002 n=10+9)\nand note that this is time/op instead of MB/s, so negative is better,\nalthough it's quite possibly all just noise.",
"is_bot": false,
"headline": "Rearrange the extendMatch register allocation.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-29T04:11:06Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "5a44a9da2110bee7a93f552127af8a74bad44fe8",
"body": "name old speed new speed delta\nWordsEncode1e1-8 712MB/s ± 1% 700MB/s ± 1% -1.65% (p=0.000 n=10+10)\nWordsEncode1e2-8 467MB/s ± 0% 460MB/s ± 1% -1.53% (p=0.000 n=9+10)\nWordsEncode1e3-8 483MB/s ± 0% 478MB/s ± 2% -0.98% (p=0.007 n=9+10)\nWordsEncode1e4-8 35\n[…]\n/s ± 1% 273MB/s ± 0% ~ (p=0.280 n=10+10)\n_ZFlat10-8 1.12GB/s ± 1% 1.17GB/s ± 1% +4.12% (p=0.000 n=10+10)\n_ZFlat11-8 460MB/s ± 0% 461MB/s ± 0% +0.34% (p=0.006 n=8+10)",
"is_bot": false,
"headline": "Inline the emitLiteral call.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-29T03:20:53Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "c3defccc353d53ff7091dba7a646f482bf15dc98",
"body": "name old speed new speed delta\nWordsEncode1e1-8 701MB/s ± 1% 712MB/s ± 1% +1.64% (p=0.000 n=10+10)\nWordsEncode1e2-8 429MB/s ± 0% 467MB/s ± 0% +8.86% (p=0.000 n=9+9)\nWordsEncode1e3-8 447MB/s ± 0% 483MB/s ± 0% +8.20% (p=0.000 n=9+9)\nWordsEncode1e4-8 32\n[…]\n/s ± 1% 273MB/s ± 1% +10.90% (p=0.000 n=10+10)\n_ZFlat10-8 1.05GB/s ± 1% 1.12GB/s ± 1% +7.02% (p=0.000 n=10+10)\n_ZFlat11-8 411MB/s ± 0% 460MB/s ± 0% +11.79% (p=0.000 n=10+8)",
"is_bot": false,
"headline": "Inline the emitCopy call.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-29T02:54:56Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "598d84db771ebc0ceb3b0bc4ae62c8d09a73c6ba",
"body": "This minimizes the diff in a follow-up commit, when manually inlining.\n\nIt's not an optimization per se, but for the record:\nname old speed new speed delta\nWordsEncode1e1-8 698MB/s ± 1% 701MB/s ± 1% ~ (p=0.165 n=10+10)\nWordsEncode1e2-8 428MB/s ± 0% 429MB/s ± 0% \n[…]\n 246MB/s ± 1% 246MB/s ± 1% ~ (p=0.921 n=9+10)\n_ZFlat10-8 1.05GB/s ± 1% 1.05GB/s ± 1% ~ (p=0.089 n=10+10)\n_ZFlat11-8 410MB/s ± 0% 411MB/s ± 0% ~ (p=0.190 n=10+10)",
"is_bot": false,
"headline": "Rearrange the emitLiteral register allocation.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-29T02:00:38Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "9f7b278fd78696f07ce25b6941fd896e50870f40",
"body": "This minimizes the diff in a follow-up commit, when manually inlining.\n\nIt's not an optimization per se, but for the record:\nname old speed new speed delta\nWordsEncode1e1-8 711MB/s ± 1% 700MB/s ± 1% -1.64% (p=0.000 n=9+10)\nWordsEncode1e2-8 407MB/s ± 1% 430MB/s ± 0% \n[…]\n7MB/s ± 1% 247MB/s ± 0% ~ (p=0.465 n=8+9)\n_ZFlat10-8 1.03GB/s ± 0% 1.05GB/s ± 1% +1.75% (p=0.000 n=9+9)\n_ZFlat11-8 409MB/s ± 0% 412MB/s ± 0% +0.64% (p=0.000 n=8+8)",
"is_bot": false,
"headline": "Rearrange the emitCopy register allocation.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-29T01:22:44Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "2b29335120440273ce87e777e4d1d511fe7894b8",
"body": null,
"is_bot": false,
"headline": "Run asmfmt.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-29T01:06:33Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "6ffc20e64ac443f023f8e1bb056e1ac5bba73ee5",
"body": null,
"is_bot": false,
"headline": "Add more comments for the asm workaround.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-29T00:31:32Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "ec642410cd033af63620b66a91ccbd3c69c2c59a",
"body": "This asm phrase works on Go 1.4 and Go tip, but not Go 1.6. I'm not sure\nwhy, but this workaround should make the package installable while I\ninvestigate.\n\nFixes #29.",
"is_bot": false,
"headline": "Workaround \"table-32768(SP)(R11*2)\" not assembling.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-24T00:32:34Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "7dddae14f78fa10091e879948a0ccf67b5acfc68",
"body": "Multiple \"end\" labels, in different functions, did not work with the Go\n1.4 toolchain.\n\nFixes #30.",
"is_bot": false,
"headline": "Fix redeclaration of \"end\" in the asm.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-24T00:07:12Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "2dbf36527785b61dd460e053f008abafbce9380b",
"body": "This is a partial undo of 4f2f9a13 \"Write the encoder's extendMatch in\nasm\" but we can selectively apply the undo only to the noasm case now\nthat encodeBlock (the function that calls extendMatch) is itself written\nin asm.\n\nWith \"go test -test.bench='Encode|ZFlat' -tags=noasm\":\nname old \n[…]\n/s ± 0% 247MB/s ± 0% +41.02% (p=0.008 n=5+5)\n_ZFlat10-8 509MB/s ± 0% 1027MB/s ± 0% +101.72% (p=0.008 n=5+5)\n_ZFlat11-8 275MB/s ± 0% 411MB/s ± 0% +49.57% (p=0.008 n=5+5)",
"is_bot": false,
"headline": "Inline extendMatch for the noasm encoder.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-23T05:01:47Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "988ce01844c82a01b918c35840520b91b398049e",
"body": "Compared to the previous commit:\nname old speed new speed delta\nWordsEncode1e1-8 667MB/s ± 0% 677MB/s ± 1% +1.57% (p=0.008 n=5+5)\nWordsEncode1e2-8 353MB/s ± 1% 428MB/s ± 0% +21.37% (p=0.008 n=5+5)\nWordsEncode1e3-8 383MB/s ± 1% 446MB/s ± 1% +16.65% (p=0.008 n\n[…]\n/s ± 0% 247MB/s ± 0% +22.17% (p=0.008 n=5+5)\n_ZFlat10-8 803MB/s ± 0% 1027MB/s ± 0% +27.93% (p=0.008 n=5+5)\n_ZFlat11-8 351MB/s ± 0% 411MB/s ± 0% +16.92% (p=0.008 n=5+5)",
"is_bot": false,
"headline": "Add a fast path for short emitLiteral calls.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-23T04:49:49Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "45da9d9c0fa12c1d81bb7dcb799ffe9ca08c8e84",
"body": "Obviously, the biggest gains are for the smallest inputs.\n\nThe WordsEncode1e1-8 benchmark should be unaffected (except possibly by\nnoise) because it never calls into encodeBlock.\n\nname old speed new speed delta\nWordsEncode1e1-8 678MB/s ± 0% 667MB/s ± 0% -1.74% (p=0.0\n[…]\n/s ± 0% 231MB/s ± 0% +0.23% (p=0.032 n=5+5)\n_ZFlat10-8 970MB/s ± 0% 972MB/s ± 0% ~ (p=0.421 n=5+5)\n_ZFlat11-8 402MB/s ± 0% 401MB/s ± 0% ~ (p=0.730 n=5+5)",
"is_bot": false,
"headline": "Zero out only that part of the hash table in use.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-23T04:31:57Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "68801229512d42e123097d5e505e89ea3f4397cc",
"body": "name old speed new speed delta\nWordsEncode1e1-8 665MB/s ± 0% 678MB/s ± 0% +2.00% (p=0.016 n=4+5)\nWordsEncode1e2-8 85.0MB/s ± 0% 90.1MB/s ± 0% +5.90% (p=0.016 n=4+5)\nWordsEncode1e3-8 234MB/s ± 2% 295MB/s ± 0% +26.20% (p=0.008 n=5+5)\nWordsEncode1e4-8 233MB/s \n[…]\n 202MB/s ± 0% 231MB/s ± 0% +14.13% (p=0.008 n=5+5)\n_ZFlat10-8 803MB/s ± 0% 970MB/s ± 0% +20.90% (p=0.008 n=5+5)\n_ZFlat11-8 351MB/s ± 0% 402MB/s ± 0% +14.29% (p=0.008 n=5+5)",
"is_bot": false,
"headline": "Write the encoder's encodeBlock in asm.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-23T04:21:06Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "17e435849f9b5cc7818817bb6e1d5c002f486fef",
"body": "It's really just a style change, not an optimization, but for the\nrecord, the numbers don't show a strong change either way, and could\neasily just be noise.\n\nname old speed new speed delta\nWordsEncode1e1-8 667MB/s ± 0% 665MB/s ± 0% ~ (p=0.190 n=5+4)\nWordsEncode1e2-8\n[…]\n 202MB/s ± 0% 202MB/s ± 0% ~ (p=0.683 n=4+5)\n_ZFlat10-8 794MB/s ± 2% 803MB/s ± 0% +1.13% (p=0.008 n=5+5)\n_ZFlat11-8 350MB/s ± 0% 351MB/s ± 0% +0.25% (p=0.032 n=4+5)",
"is_bot": false,
"headline": "Restrict the scope of the tableSize variable.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-23T02:28:42Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "0c43e98dfe3f41a99362fa041990a047da508eee",
"body": null,
"is_bot": false,
"headline": "Add comment that dst and src must not overlap.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-23T02:17:41Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "62bb72da9a2bbb2139731f3da2659852bd15df18",
"body": "name old speed new speed delta\nWordsEncode1e1-8 665MB/s ± 0% 667MB/s ± 0% +0.35% (p=0.008 n=5+5)\nWordsEncode1e2-8 83.8MB/s ± 1% 85.1MB/s ± 0% +1.47% (p=0.008 n=5+5)\nWordsEncode1e3-8 231MB/s ± 1% 235MB/s ± 0% +1.81% (p=0.008 n=5+5)\nWordsEncode1e4-8 232MB/s ± 1\n[…]\n 200MB/s ± 0% 202MB/s ± 0% +0.95% (p=0.016 n=5+4)\n_ZFlat10-8 797MB/s ± 0% 794MB/s ± 2% ~ (p=1.000 n=5+5)\n_ZFlat11-8 351MB/s ± 1% 350MB/s ± 0% ~ (p=0.730 n=5+4)",
"is_bot": false,
"headline": "Write the encoder's emitLiteral in asm.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-23T02:05:56Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "d8211ff0ee1575ab421cd4b9504bfe1d7c7d7f76",
"body": "name old speed new speed delta\nWordsEncode1e1-8 690MB/s ± 0% 665MB/s ± 0% -3.64% (p=0.008 n=5+5)\nWordsEncode1e2-8 83.7MB/s ± 1% 83.8MB/s ± 1% ~ (p=0.421 n=5+5)\nWordsEncode1e3-8 230MB/s ± 1% 231MB/s ± 1% ~ (p=0.421 n=5+5)\nWordsEncode1e4-8 233MB/s ± 1\n[…]\n(p=0.056 n=5+5)\n\nI'm not overly worried about the WordsEncode1e1-8 change: the time/op is\naround 15 nanoseconds, which is tiny. In comparison, _ZFlat0-8 takes\naround 163 microseconds (note µs not ns).",
"is_bot": false,
"headline": "Write the encoder's emitCopy in asm.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-23T01:48:21Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "4f2f9a13dd7ed6975c4470af560e8ff2f93b127d",
"body": "name old speed new speed delta\nWordsEncode1e1-8 678MB/s ± 0% 690MB/s ± 0% +1.79% (p=0.008 n=5+5)\nWordsEncode1e2-8 87.5MB/s ± 0% 83.7MB/s ± 1% -4.26% (p=0.008 n=5+5)\nWordsEncode1e3-8 257MB/s ± 1% 230MB/s ± 1% -10.41% (p=0.008 n=5+5)\nWordsEncode1e4-8 247MB/s \n[…]\n=0.008 n=5+5)\n_ZFlat11-8 278MB/s ± 0% 348MB/s ± 0% +25.09% (p=0.008 n=5+5)\n\nname old time/op new time/op delta\nExtendMatch-8 16.5µs ± 1% 7.8µs ± 1% -52.93% (p=0.008 n=5+5)",
"is_bot": false,
"headline": "Write the encoder's extendMatch in asm.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-23T01:26:04Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "1f4d362d6d1f2f31bf10a5a7075f021dea6a225d",
"body": "This allows deleting some redundant code.\n\nname old speed new speed delta\nWordsEncode1e1-8 679MB/s ± 0% 678MB/s ± 0% ~ (p=0.087 n=5+5)\nWordsEncode1e2-8 87.5MB/s ± 0% 87.5MB/s ± 0% ~ (p=0.579 n=5+5)\nWordsEncode1e3-8 258MB/s ± 0% 257MB/s ± 1% ~ (p=\n[…]\n 175MB/s ± 0% 175MB/s ± 0% ~ (p=0.095 n=5+5)\n_ZFlat10-8 507MB/s ± 0% 507MB/s ± 0% ~ (p=0.222 n=5+5)\n_ZFlat11-8 277MB/s ± 0% 278MB/s ± 0% +0.38% (p=0.008 n=5+5)",
"is_bot": false,
"headline": "Clarify the emitLiteral and emitCopy preconditions.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-23T00:40:18Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "bd94318f58a5b6f6c8af0f67bb1788c8d2d530a3",
"body": null,
"is_bot": false,
"headline": "Add some more encoder tests.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-23T00:29:32Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "774a97396f7bfa4165e9dcf4bfa0747ea3edcc02",
"body": "It was no longer used as of commit 8939696c \"Use the same encoding\nalgorithm as C++ snappy\".",
"is_bot": false,
"headline": "Remove the no-longer-used maxOffset constant.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-16T05:15:34Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "3588d1dd84953d8f7effbfbde1fe352cfdf13c65",
"body": "The general suggestion to use a noasm tag is by Klaus Post at\nhttps://groups.google.com/d/msg/golang-dev/CeKX81B3WdQ/2mq-eY0VAgAJ",
"is_bot": false,
"headline": "Add appengine and noasm build tags.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-14T08:47:10Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "fa0b0e6289e9a08f133cb431fc5fca8e2265767c",
"body": "It seems like a small win:\n\nbenchmark old MB/s new MB/s speedup\nBenchmarkWordsEncode1e1-4 465.69 471.77 1.01x\nBenchmarkWordsEncode1e2-4 60.18 60.27 1.00x\nBenchmarkWordsEncode1e3-4 174.42 176.26 1.01x\nBenchmarkWordsEncode1e\n[…]\n47 1.01x\nBenchmark_ZFlat9-4 125.40 125.85 1.00x\nBenchmark_ZFlat10-4 364.30 370.35 1.02x\nBenchmark_ZFlat11-4 200.04 199.80 1.00x",
"is_bot": false,
"headline": "Eliminate some bounds checks.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-12T00:37:28Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "ef80b33e873821cff33038ae16c444717218cdb1",
"body": "Doing s/int32/uint16/ in \"var table [maxTableSize]int32\" saves 32 KiB of stack\nspace that needed zero'ing. maxTableSize is 1<<14, or 16384.\n\nWe couldn't do this before, in commit cc71ae7c, since we didn't have\nmaxBlockSize = 65536 at the time.\n\nbenchmark old MB/s new MB/s \n[…]\n61 1.02x\nBenchmark_ZFlat9-4 121.73 125.62 1.03x\nBenchmark_ZFlat10-4 360.89 365.62 1.01x\nBenchmark_ZFlat11-4 195.92 199.96 1.02x",
"is_bot": false,
"headline": "Change the encoder's hash table values from int32 to uint16.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-11T02:06:28Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "70f093abd7c11f120162d8f77684deadbe37bbf2",
"body": "The testdata/Mark.Twain-Tom.Sawyer.txt file is the first chapter of the\nsrc/compress/testdata/Mark.Twain-Tom.Sawyer.txt file in the Go repo.\n\nThe rawsnappy version was generated by cmd/snappytool in this repo,\nusing the C++ snappy library as of commit d53de187 (2016-04-05).",
"is_bot": false,
"headline": "Use a more compressible golden input for the tests.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-10T06:29:43Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "9bc0b5ad10791df6db28196b243094a7694ef806",
"body": "This is the Go equivalent of an algorithmic change in the C++ snappy\ncode:\nhttps://github.com/google/snappy/commit/d53de18799418e113e44444252a39b12a0e4e0cc\n\nThe discussion is at:\nhttps://groups.google.com/d/topic/snappy-compression/3Qa3fASLkNA/discussion\n\nbenchmark old MB/s n\n[…]\n84 1.00x\nBenchmark_ZFlat9-8 169.02 168.59 1.00x\nBenchmark_ZFlat10-8 500.19 499.85 1.00x\nBenchmark_ZFlat11-8 271.20 270.60 1.00x",
"is_bot": false,
"headline": "Make heuristic match skipping more aggressive.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-10T06:02:28Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "cef980a12b316c5b7e5bb3a8e168eb43ae999a88",
"body": null,
"is_bot": false,
"headline": "Add more commentary to minNonLiteralBlockSize.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-07T05:15:05Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "6218a584d0b00caa84f10acfb2eeb5e043b80706",
"body": null,
"is_bot": false,
"headline": "Clarify the semantics of minNonLiteralBlockSize.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-07T05:09:02Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "a2aa89c177511a0881193da2623539494a961109",
"body": null,
"is_bot": false,
"headline": "Add a TestSameEncodingAsCppShortCopies test.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-07T04:50:07Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "857ad66e003f466b64f9055849bab122efd4c87a",
"body": "Fixes #27.",
"is_bot": false,
"headline": "Add gc build tag for the asm code.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-04T00:05:40Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "3675542200b9752da8f113251b47f0d5b372f414",
"body": null,
"is_bot": false,
"headline": "Don't allow EOF in the middle of a framing chunk.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-03T13:08:03Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "0e8b256be2776b48cc0a2a11e5ae228f57471078",
"body": "It should return an error instead.\n\nFixes #26.",
"is_bot": false,
"headline": "Fix a too-long uncompressed frame chunk causing a panic.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-03T12:40:17Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "aca045a2df1eccb72d28abc3066fd19a8fe57a14",
"body": null,
"is_bot": false,
"headline": "Clarify when goEncoderShouldMatchCppEncoder.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-03T10:56:43Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "8939696c2214cde5dda896a76f5bf56e80a16855",
"body": "When encoding the benchmark files, the output size is smaller:\n\nlen(in)\told_len(out)\tnew_len(out)\tnew/old_ratio\tdescription\n102400\t23488\t22842\t0.97\thtml\n702087\t346345\t335387\t0.97\turls\n123093\t123034\t123034\t1.00\tjpg\n200\t144\t146\t1.01\tjpg_200\n102400\t83786\t83817\t1.00\tpdf\n409600\t95095\t92221\t0.97\thtml4\n152\n[…]\n08 1.14x\nBenchmark_ZFlat9-8 149.43 168.62 1.13x\nBenchmark_ZFlat10-8 412.63 497.87 1.21x\nBenchmark_ZFlat11-8 247.98 269.43 1.09x",
"is_bot": false,
"headline": "Use the same encoding algorithm as C++ snappy.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-03T01:18:01Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "ebebc717213d6f16fd33dd6a2f74e776af6493c3",
"body": "This isn't an optimization per se, although it does trade off the\n\"encode 10 bytes\" benchmark to favor speed over output size. The point\nof this commit is to move closer to what the C++ snappy code does.\n\nbenchmark old MB/s new MB/s speedup\nBenchmarkWordsEncode1e1-8 5\n[…]\n62 1.01x\nBenchmark_ZFlat9-8 147.71 149.43 1.01x\nBenchmark_ZFlat10-8 414.06 412.63 1.00x\nBenchmark_ZFlat11-8 248.87 247.98 1.00x",
"is_bot": false,
"headline": "Raise the \"always encode as literal\" size threshold from 4 to 14.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-02T23:25:18Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "7ede8d1b136c90ae4e1bee23e8a36693adca8751",
"body": "As per\nhttps://groups.google.com/d/msg/golang-dev/jVP6h21OyL8/Syhfot9XBQAJ,\nrecent versions of the gc compiler can optimize:\n\nfunc load32(b []byte, i int32) uint32 {\n b = b[i : i+4 : len(b)]\n return uint32(b[0]) | etc | uint32(b[3])<<24\n}\n\nbenchmark old MB/s new MB/s sp\n[…]\n91 1.03x\nBenchmark_ZFlat9-8 142.33 147.71 1.04x\nBenchmark_ZFlat10-8 401.93 414.06 1.03x\nBenchmark_ZFlat11-8 235.94 248.87 1.05x",
"is_bot": false,
"headline": "Eliminate some bounds checks in the encoder.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-02T22:30:29Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "d1f56d22221367c22b310feca1ba49a062f3d646",
"body": "The benchmarks don't show a big change either way, but the output is\nshorter, and it matches what the C++ snappy code does.\n\nbenchmark old MB/s new MB/s speedup\nBenchmarkWordsEncode1e1-8 5.77 5.77 1.00x\nBenchmarkWordsEncode1e2-8 47.15 47.26 \n[…]\n21 1.00x\nBenchmark_ZFlat9-8 141.81 142.32 1.00x\nBenchmark_ZFlat10-8 399.79 401.94 1.01x\nBenchmark_ZFlat11-8 237.43 235.91 0.99x",
"is_bot": false,
"headline": "Encode copies of length 65, 66 or 67 as 5 bytes, not 6.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-04-02T05:22:40Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "5f1c01d9f64b941dd9582c638279d046eda6ca31",
"body": "benchmark old MB/s new MB/s speedup\nBenchmarkWordsDecode1e1-8 528.93 528.93 1.00x\nBenchmarkWordsDecode1e2-8 983.60 999.00 1.02x\nBenchmarkWordsDecode1e3-8 1474.03 1513.22 1.03x\nBenchmarkWordsDecode1e4-8 1523.38 1561.36\n[…]\n84 1.00x\nBenchmark_UFlat9-8 731.84 726.50 0.99x\nBenchmark_UFlat10-8 2775.21 2898.57 1.04x\nBenchmark_UFlat11-8 1032.75 1032.47 1.00x",
"is_bot": false,
"headline": "Optimize a 16-byte load and store.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-03-04T05:48:22Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "427fb6fc07997f43afa32f35e850833760e489a7",
"body": "Relative to the previous commit:\n\nbenchmark old MB/s new MB/s speedup\nBenchmarkWordsDecode1e1-8 518.80 508.74 0.98x\nBenchmarkWordsDecode1e2-8 871.43 962.52 1.10x\nBenchmarkWordsDecode1e3-8 1411.32 1435.51 1.02x\nBenchmarkWordsDe\n[…]\ntra compression. Decompression\ncollapses to not much more than repeatedly invoking runtime.memmove, so\noptimizing the snappy code per se doesn't have a huge impact on that\nparticular benchmark number.",
"is_bot": false,
"headline": "Optimize asm for decoding copy fragments some more.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-02-26T06:30:25Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "4c1fc8e426266f00229956994142877543e8b514",
"body": "Relative to the previous commit:\n\nbenchmark old MB/s new MB/s speedup\nBenchmarkWordsDecode1e1-8 518.05 518.80 1.00x\nBenchmarkWordsDecode1e2-8 776.28 871.43 1.12x\nBenchmarkWordsDecode1e3-8 995.41 1411.32 1.42x\nBenchmarkWordsDe\n[…]\n38 1.79x\nBenchmark_UFlat9-8 423.36 724.43 1.71x\nBenchmark_UFlat10-8 1023.05 1193.70 1.17x\nBenchmark_UFlat11-8 507.18 879.15 1.73x",
"is_bot": false,
"headline": "Optimize asm for decoding copy fragments.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-02-26T06:21:48Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "8c7c9dec5965484f0a81268ce7985fe31e5d5955",
"body": "Relative to the previous commit:\n\nbenchmark old MB/s new MB/s speedup\nBenchmarkWordsDecode1e1-8 519.36 518.05 1.00x\nBenchmarkWordsDecode1e2-8 691.63 776.28 1.12x\nBenchmarkWordsDecode1e3-8 858.97 995.41 1.16x\nBenchmarkWordsDe\n[…]\n19 1.14x\nBenchmark_UFlat9-8 362.89 423.36 1.17x\nBenchmark_UFlat10-8 943.89 1023.05 1.08x\nBenchmark_UFlat11-8 493.98 507.18 1.03x",
"is_bot": false,
"headline": "Optimize asm for decoding literal fragments.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-02-26T06:17:00Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "402436317ad8035a7246ee89492064f9e6cbb4ce",
"body": "This is an experiment. A future commit may roll back this commit if it\nturns out that the complexity and inherent unsafety of asm code\noutweights the performance benefits.\n\nThe new asm code is covered by existing tests: TestDecode,\nTestDecodeLengthOffset and TestDecodeGoldenInput. These tests were\nc\n[…]\n benefits of hand-written asm gets you another\n1.2x over and above that.\n\nFor reference, I've copy/pasted the \"go tool compile -S -B -o /dev/null\nmain.go\" output at http://play.golang.org/p/vOs4Z7Qf1X",
"is_bot": false,
"headline": "Rewrite the core of the decoder in asm.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-02-26T06:03:02Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "03ee571cd35416c1f81a9f9ad7437493f356666d",
"body": "Previously, the dst buffer was initialized to all 0xfe byte values. An\noverrun caused by an incorrect copy from an early location to a later\none (past the end of dst) could have slipped through as a false negative\nbecause the old value and the new value were the same value (0xfe), so\nno change was detected.\n\nAfter this commit, the dst buffer is initialized with a variety of byte\nvalues, which makes it less likely, although not impossible, to have\nsuch false negatives.",
"is_bot": false,
"headline": "Use more than one 'not present' byte value to catch Decode overruns.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-02-26T04:08:01Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "9eb9b0a693667cb6f6f82bfaad32bc9604818ccb",
"body": null,
"is_bot": false,
"headline": "Add a comment about forwardCopy semantics.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-02-26T03:40:06Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "da163d3224e54fb4a5616b463f429a267c490ab0",
"body": null,
"is_bot": false,
"headline": "Note that Decode's dst and src must not overlap.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-02-25T23:31:01Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "12528fe03377c314f32e3dc5e029835d42ccad90",
"body": "An upcoming commit will switch algorithms at values near this magic cutoff.",
"is_bot": false,
"headline": "Make TestDecodeLengthOffset test values above 16.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-02-25T12:55:04Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "32b392a8a69efa93c6b91f2879ce2e8d7cc48e6a",
"body": "I'm not entirely sure why the benchmark numbers improve as much as they\ndo, but I'll take it.\n\nbenchmark old MB/s new MB/s speedup\nBenchmarkWordsDecode1e1-8 482.12 485.84 1.01x\nBenchmarkWordsDecode1e2-8 372.28 421.86 1.13x\nBenchmarkWordsDec\n[…]\n80 1.02x\nBenchmark_UFlat9-8 256.39 262.69 1.02x\nBenchmark_UFlat10-8 590.37 640.96 1.09x\nBenchmark_UFlat11-8 339.13 357.01 1.05x",
"is_bot": false,
"headline": "Make a small s/uint/uint32/ decoder optimization.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-02-25T05:58:01Z",
"body_truncated": true,
"is_coding_agent": false
},
{
"oid": "624b11c0e081dc0941e36b0f1c84436dc78b9384",
"body": null,
"is_bot": false,
"headline": "Fix some comment styles.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-02-25T04:30:12Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "bb00731b7e6e99396fd9fceb71cb9a4ec8d5a84e",
"body": null,
"is_bot": false,
"headline": "Ensure that Decode doesn't write past the decoded length.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-02-25T03:10:04Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "343d0f457986aaa28f2f835d2fc658b05f2f0575",
"body": "The pi.txt.rawsnappy file was generated by this tool, on an amd64\n(little-endian) system.",
"is_bot": false,
"headline": "Add a snappytool command that uses the C++ library.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-02-25T02:31:42Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "f1ae40350d6b5e75c92360916bf2b8682fefdb9d",
"body": null,
"is_bot": false,
"headline": "Update .gitignore.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-02-25T00:51:15Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "6d15e7ca47959c9369adfcdc4dee85987e724222",
"body": "An upcoming commit will add other testdata files.",
"is_bot": false,
"headline": "Move benchmark data files to testdata/bench.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-02-25T00:27:56Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "a64ab7d6ec9063f18962f0e493a31e7093df6102",
"body": null,
"is_bot": false,
"headline": "Add TestDecodeLengthOffset.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-02-23T12:49:10Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "b95e9b379b96cebd6fe84815474678b48f01aae5",
"body": null,
"is_bot": false,
"headline": "Merge overlapping test cases in TestInvalidVarint and TestDecode.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-02-23T11:58:05Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "939eddc12b3be18dfc77ed573344c3c689527ef3",
"body": null,
"is_bot": false,
"headline": "Add some more TestDecode cases.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-02-23T02:12:51Z",
"body_truncated": false,
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},
{
"oid": "e2923611954f008a6e6c8dfb5ae11052aa913332",
"body": null,
"is_bot": false,
"headline": "Catch overflow when incrementing src pointers.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-02-22T02:44:50Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "bf2ded9d81f5c22b62cf76363673c6f9765a6703",
"body": "This enables future optimizations, such as an encoder's hash table entry being\nuint16 instead of int32.",
"is_bot": false,
"headline": "Use 64K blocks when encoding long inputs.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-02-22T01:44:36Z",
"body_truncated": false,
"is_coding_agent": false
},
{
"oid": "d1d908a252c22fd7afd36190d5cffb144aa8f777",
"body": "The heuristic was introduced in 4e2aa98e, based on the C++ Snappy\nimplementation, but the Go code contained a flawed optimization. The C++ code\nused an explicit skip variable:\n\n uint32 bytes_between_hash_lookups = skip++ >> 5;\n next_ip = ip + bytes_between_hash_lookups;\n\nwhereas the Go code optimi\n[…]\nenerated on an amd64 machine, but on a different machine\nthan the one used for other recent commits. The raw MB/s numbers are therefore\nnot directly comparable, although the speedup numbers should be.",
"is_bot": false,
"headline": "Fix heuristic match skipping.",
"author_name": "Nigel Tao",
"author_login": "nigeltao",
"committed_at": "2016-02-14T05:54:35Z",
"body_truncated": true,
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}
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Las puntuaciones son señales, no garantías. Reflejan prácticas públicamente visibles en GitHub; no son una auditoría de código ni una garantía de seguridad.
Los datos ausentes se excluyen y los pesos se renormalizan; nunca se puntúan como cero. La metodología es versionada y abierta: métricas v1.13.0, esquema v0.27.0 — metodología completa · wiki de métricas.
