#performance

Caliper is an instrumentation and performance profiling library

World's Fastest .NET CSV Parser. Modern, minimal, fast, zero allocation, reading and writing of separated values (`csv`, `tsv` etc.). Cross-platform, trimmable and AOT/NativeAOT compatible with blazing fast SIMD vectorized parsing.

A cross-platform library for adding Firebase Performance to MAUI applications

TinyBDD is a minimal, fluent Behavior-Driven Development library for .NET

Ohayou(おはよう), HTTP load generator, inspired by rakyll/hey with tui animation.

📜 A performant virtual list/scrolling component for Svelte applications - efficiently render large scrollable lists with minimal memory usage

The opinionated high performance professional-grade AI package for Go

Quickly find bottlenecks in Rust - one profiler for CPU, time, memory, SQL and async code.

A high-performance, stack-only string builder that rents its underlying buffer from ArrayPool instead of allocating new arrays. Designed for short-lived string construction.

FusionCache is an easy to use, fast and robust hybrid cache with advanced resiliency features.

An abstract class for benchmarking tests in .NET, integrating BenchmarkDotNet with Xunit's output helper and providing a method to log benchmark summaries asynchronously.

Lightweight, type-safe database query builder for Go with zero production dependencies. Advanced SQL features (JOINs, subqueries, CTEs, window functions), batch operations (3x faster), LRU statement cache (<60ns). Professional API documentation. PostgreSQL, MySQL, SQLite support.

A framework for finding JavaScript memory leaks and analyzing heap snapshots

Providing helper methods for BenchmarkDotNet's Summary object.

a load testing tool extended from locust

A Functional Library for Daily Frontend Work

A Tailwind & UnoCSS-like utility-first, atomic CSS framework.

High-throughput, load-bearing Go HTTP engine — a protocol-aware dual-architecture (io_uring & epoll) that leads driver-backed and write-heavy throughput, with a familiar Gin/Echo-style API and zero-allocation hot paths.

pytest fixture for benchmarking code

💬 A performant virtual chat component for Svelte applications - efficiently render large scrollable chat interfaces with minimal memory usage

A high-performance, reusable StringWriter that avoids unnecessary allocationsby clearing and reusing its internal StringBuilder instance.

Fast Compiler for C# Expression Trees and the lightweight LightExpression alternative. Diagnostic and code generation tools for the expressions.

High performance Node.js webserver with a simple-to-use API powered by uWebsockets.js under the hood.

Better Stack Next.js client

Intelligent static page caching for creating lightning-fast sites with Craft CMS.

A gzip, brotli and zstd compressor for Astro

A TypeScript-native syntax highlighter with comprehensive grammar support for modern web languages. Built for performance.

CI performance intelligence tool — detect outliers, regressions, flaky pipelines, and cost hotspots in GitHub Actions

Restart a CLI process without loading the xdebug extension.

A high-performance Go HTTP router for building reverse proxies and API gateways, including use cases like ingress controllers