JSPM

webpack speed booster, makes you happy!

Easily monitor your ThreeJS performances.

Send WebVitals from your Next.js project to Axiom.

Command-line interface for tw-enigma CSS optimization

A virtual DOM library with focus on simplicity, modularity, powerful features and performance.

Speed up eslint to accelerate your development workflow

The core Node library used to integrate with Codspeed runners

A fast Mersenne Twister

A bluebird wrapper for node-mysql

A JavaScript library for measuring the First Input Delay metric. See https://goo.gl/1AKcj5.

Intelligent performance optimization engine - Automated bottleneck detection, code optimization suggestions, resource optimization, and performance enhancement recommendations.

React hook to monitor an element enters or leaves the viewport (or another element).

**Fully** Reactive Component Template Rendering in Angular. @rx-angular/template aims to be a reflection of Angular's built in renderings just reactive.

Generate critical path CSS for web pages

Relocate resource intensive third-party scripts off of the main thread and into a web worker.

A light-weight JS library to lazy load any HTML element such as images, ads, videos etc.

User Timing polyfill

Size Limit preset for applications

Use Partytown to move scripts into a web worker in your Astro project

@rx-angular/cdk is a Component Development Kit for ergonomic and highly performant angular applications. It helps to to build Large scale applications, UI libs, state management, rendering systems and much more. Furthermore the unique way of mixing reacti

Internal metrics plug-in package for Node.js monitoring with Instana

Perform data joins with any type of JS objects

Get the speed index from chrome dev tool timeline files. The CLI

A React Higher Order component that wraps your React Components and debounces their rendering. Uses lodash.debounce under the hood.

vitest plugin for CodSpeed

ultility to measure execution time

JSON parser and stringifier for custom numbers (e.g. BigInt)

Signals for managing, caching and syncing asynchronous and remote data in Angular

Core library for Instana's Node.js packages

Parse performance test results from JMeter and many more

Improve your Nuxt.js Google Lighthouse score by delaying hydration ⚡️

Mixins that manage rendered CSS from modular importing

High-performance, virtualized list for React Native. Efficiently renders large datasets with recycler API for smooth scrolling and low memory usage. Ideal for fast, scalable, customizable lists on Android, iOS, and web.

measure startup time of your react-native app

infinite-scroll, done right. done.

Run load tests for your web application. Mostly ab-compatible interface, with an option to force requests per second. Includes an API for automated load testing.

Size Limit preset for big open source libraries

Stylelint rule for preventing the use of low performance animation and transition properties.

Performance optimization tools for OrdoJS applications

A performant virtual scrolling list library

Customize scrollbar in modern browsers with smooth scrolling experience.

Optimize the speed of important tasks on limited ressources

Web performance library for measuring all User-centric performance metrics, including the latest Web Vitals.

A JavaScript library for zooming images like Medium

Smooth page transitions, smart preloading and more in Astro

Harness the power of Intersection Observers for simple list virtualization in React

Better Stack Telemetry Next.js client

redux store enhancer which allows batching subscribe notifications.

requestAnimationFrame pool to avoid busyness on the thread

The linting tool for the web

A d3.js library to produce flame graphs.

Like Underscore, but lazier

A simple, light-weight NodeJS utility for measuring code execution in high-resolution real times.

Compress 🗜️

General Language Independent Driver for the Enterprise (GLIDE) for Valkey

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

Automatically sort your head with capo.js in Astro

request animation frame

webhint's recommended hints configuration for live websites

High-performance streaming multipart/mixed parser for Node.js

Collection of utilities for InfernoJS

Generate performance statistics for async or sync functions

[![npm version][npm-version-src]][npm-version-href] [![npm downloads][npm-downloads-src]][npm-downloads-href] [![Github Actions][github-actions-src]][github-actions-href] [![Codecov][codecov-src]][codecov-href]

This module can add `ServerTiming` Header to http response, and be able to use express middleware

request animation frame

Faster subsequent page-loads by prefetching in-viewport links during idle time

Breakpoints mixin pack for Seed

Run gulp tasks in separate cpu processes

An extremely fast JSX, HTML and XML parser written in Rust compiled to WebAssembly for Node and the Web

Patches global.Promise to use bluebird and returns a bluebird instance

Playwright plugin for analyzing test flow performance

A dead simple benchmarking framework

This plugin gives you the ability to use the Dynatrace Mobile agent in your react native application.

A comprehensive Model Context Protocol (MCP) server that provides web performance auditing, accessibility testing, SEO analysis, security assessment, and Core Web Vitals monitoring using Google Lighthouse. Enables LLMs and AI agents to perform detailed we

Implement live chat in your react app without taking a performance hit.

esbuild plugin for Size Limit

Fast and lightweight, standard-compliant javascript parser written in ECMAScript

Native bindings for valkey-glide on linux-x64-gnu

Webpack Statoscope plugin for Size Limit

WebRTC2 Utils - Cross-platform WebRTC utility functions for device detection, media management, error handling, and performance optimization

@rx-angular/state is a light-weight, flexible, strongly typed and tested tool dedicated to reduce the complexity of managing component state and side effects in angular

划时代的字体切割工具，CJK与任何字符！支持 otf、ttf、woff2 字体多线程切割，完美地细颗粒度地进行包大小控制。A revolutionary font subetter that supports CJK and any characters! It enables multi-threaded subset of otf, ttf, and woff2 fonts, allowing for precise control over package size.

Min Heap

Fast and small Node.js Worker_Threads and Cluster Worker Pool

Core optimization features for ZenReact - High-performance React state management and rendering optimization

Inspect module load time with performance.measure

Compress 🗜️

Lazily render react components

Benchmark.js compatibility layer for CodSpeed

High performance debug logging

Scan your entire website with Google Lighthouse.

NextJS version of Webpack Bundle Analyzer.

Fast way to send synchronous web requests in NodeJS. API is a subset of sync-request. Leverages node-libcurl for high performance. Cannot be used in a browser.

Node.js SDK for Dynatrace OneAgent

Angular library which drastically improves execution time of your component's unit tests

WebRTC2 Utils - Cross-platform WebRTC utility functions for device detection, media management, error handling, and performance optimization

Native bindings for valkey-glide on linux-x64-musl

A gzip, brotli and zstd compressor for Astro

Select virtualized component using: react-select v4 + react-virtualized + react hooks

A 100% compliant, self-hosted typescript parser that emits an ESTree-compatible abstract syntax tree

A thin wrapper around fetch that prevents duplicate requests.

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console.time, console.timeLog and console.timeEnd polyfill for react-native

Comprehensive library for monitoring system statistics including CPU, memory, disk, network, battery, and process information with time-series monitoring

A tiny React hook for rendering large datasets like a breeze.

memoize the last result, in async way

A high-performance charting library.

Delightfully scan your entire website with Google Lighthouse. Navigate your performance, accessibility and SEO.

Efficient shallow equality algorithm that also allows checks for react element equality of children props

Blazing fast flame graphs for V8 and Node

Use Qwik components and Resumability within Astro

Functional CSS for humans

A Svelte action that monitors an element enters or leaves the viewport or a parent element. Performant and efficient thanks to using Intersection Observer under the hood.

A Vite plugin for React Scan - detects performance issues in your React app.

Use Alpine within Astro

A fast lightweight pure JavaScript script for lazy loading and multi-serving images, iframes, videos and more.

Performance optimization helper for React applications

ObserveRTC Client Integration Javascript Library

Monitor your web app's performance

<h1 align="center" style="border-bottom: none;">🔎 PerformanceObserver Polyfill</h1> <p align="center"> <a href="https://travis-ci.org/fastly/performance-observer-polyfill"> <img alt="Travis" src="https://img.shields.io/travis/fastly/performance-obs

Enable other React components to be selectable by drawing a box with your mouse/touch

React component for visualizing profiling data

A developer tool for debugging React performance issues caused by hook changes and component re-renders.

The hapi utility toy chest

Webpack plugin to inline critical CSS and lazy-load the rest.

Very simple module to calculate block execution time.

react StaticContainer

Record PerformanceEntry objects from Node.js and the Web in the Trace Event Format, so that it can be visualized on https://ui.perfetto.dev.

WebPageTest API wrapper for NodeJS

Fast and consistently responsive apps using a single function call

The modular and type-safe form library for Qwik

Measure Babel compilation time

Lazy loading for express router

Imagemin meets Rollup!

Border theme pack for Seed

📈 Beautiful, high-performance Graphs and Charts for React Native

Cutting edge GraphQL planning and execution engine

Props mixin pack for Seed

Memoz is an in-memory database that persists on disk. The data model is key-value.

JustGage is a handy JavaScript plugin for generating and animating nice & clean gauges. It is based on Raphaël library for vector drawing, so it’s completely resolution independent and self-adjusting.

Walk the primary nodes of an esprima parse tree - fast.

Parse raw trace data into the Chrome DevTools' structured profiling data models

statman-stopwatch is one of the metrics from the statman library. It is a simple high res stopwatch for node.js. Stopwatch is useful for determining the amount of time it takes to perform an activity.

An automatic Web Font optimization plugin that supports many platforms such as Vite, Next, Nuxt, and more.

Get time passed since node.js app start. Similar to performance.now() from browsers.

Fast cartesian product

The modular and type-safe form library for SolidJS

Native bindings for valkey-glide on linux-arm64-musl

the fastest function for deep clone js objects compatible with es6

Speed-optimized BitSet implementation for modern browsers and JavaScript engines, using typed arrays

A CLI to run all kinds of code quality measurements to align your team with company goals

Better image downscale with canvas.

A performant binary encoding for geographic data

Agent for AppOptics APM

Express middleware providing on-demand caching in high traffic situations.

A Cypress plugin for reporting individual command timings

A simple requestAnimationFrame wrapper with added iteratee creator.

A custom Jest reporter that identifies and reports on the slowest running tests in your test suite.

Nuxt.js module to automatically make your webpack builds faster and smaller.

AI-powered React performance monitoring with MCP integration

An opentracing implementation for zipkin

Native bindings for valkey-glide on linux-arm64-gnu

Constant for better performance

Skeleton elements (aka UI Skeletons, Skeleton Screens, Ghost Elements) - UI for improved perceived performance

Core business logic for the used by the Code PushUp CLI

Performant react hooks for WebApi Observers, useResizeObserver, useInteractionObserver, useMutationObserver

A lightweight utility for ES6 like classes and an easier ES5 aware object properties definition introducing new, performance oriented, patterns.

Easily monitor your vanilla ThreeJS app performances.

Caches resolved paths in module require to avoid Node hunting for right module. Speeds up app load.

A short and quick way to assess performance on a server.

Make your site’s pages instant in 1 minute and improve your conversion rate by 1%

An in-memory caching (memoization) decorator for Typescript

Code PushUp plugin for detecting problems in source code using ESLint.📋

A Fast & Light Virtual DOM Alternative

Simple module to time your code JavaScript or TypeScript code, to see how long it took to run.

Native bindings for valkey-glide on darwin-arm64

Inline 🦔

Web Vitals for Nuxt.js

Memoize functions - An optimization used to speed up consecutive function calls by caching the result of calls with identical input

🔌⚡ Nuxt module to prune html before sending it to the browser (it removes elements matching CSS selector(s)), useful for boosting performance showing a different HTML for bots/audits by removing all the scripts with dynamic rendering

Stateless weak memoization replacement for reselect and memoize-one

Neo.mjs: The multi-threaded UI framework for building ultra-fast, desktop-like web applications with uncompromised responsiveness, inherent security, and a transpilation-free dev mode.

* [About the Project](#about-the-project) * [Getting Started](#getting-started) * [Installation](#installation) * [TypeScript](#typescript) * [Usage](#usage) * [Component](#component) * [Props](#props) * [Hook](#hook) * [Roadmap](#roadmap) * [Contributing

Check load performance of your module and its dependencies

A feature-rich React package for stunning animated backgrounds with interactive controls, themes, performance monitoring, and layered compositions.

Lazy is a fast, feature-rich and lightweight delayed content loading plugin for jQuery and Zepto. It's designed to speed up page loading times and decrease traffic to your users by only loading the content in view.

A modern benchmarking library for Node.js

A WebdriverIO service that allows you to run Chrome DevTools commands in your tests

Performance focused, lightweight scroll animation library

Give users a great experience best suited to their device and network constraints

A Redux store enhancer which uses User Timing API to profile redux actions and time spent on notifying store listeners

Timings for HTTP requests. This is a fork of @szmarczak/http-timer, but with CommonJS support.

React Native library for detecting component visibility in the viewport.

Convert LI-HAR to k6 script

Benchmark runner for NodeJS

LightWeight, dependency free, javascript object cleaning library

Ultra-fast MessagePack implementation with extensions for records and structured cloning

automatic redis pipeline

A SVG-based LQIP image placeholder generator

Native bindings for valkey-glide on darwin-x64

Webpack plugin to support css for Size Limit

Return a high-resolution time.

Package to assist with collection of metrics, including stopwatch functionality

A lightweight, high-performance virtual list component for Svelte 5 that renders large datasets with minimal memory usage. Features include dynamic height support, smooth scrolling, TypeScript support, and efficient DOM recycling. Ideal for infinite scrol

Automatic performance and profiling instrumentation for your jest tests.

React implementation of smooth-scrollbar

Comprehensive command-line interface for StackSleuth - Interactive dashboard, real-time monitoring, performance reports, CI/CD integration, and automated performance optimization recommendations.

Write very fast map/filter/reduce code

sitespeed.io is an open-source tool for comprehensive web performance analysis, enabling you to test, monitor, and optimize your website’s speed using real browsers in various environments.

Dash0's Web SDK to collect telemetry from end-users' web browsers

A versatile and captivating React Native component that empowers developers to seamlessly integrate Instagram-style stories into their mobile applications, fostering an engaging and interactive user experience.

[![github actions][actions-image]][actions-url] [![coverage][codecov-image]][codecov-url] [![dependency status][deps-svg]][deps-url] [![dev dependency status][dev-deps-svg]][dev-deps-url] [![License][license-image]][license-url] [![Downloads][downloads-im

Production-ready HTTP client for bulk operations with connection pooling, exponential backoff, streaming, and comprehensive error handling

A collection of standard data-structures for node and browser

Enterprise-grade base repository architecture for GOD-EYE microservices with zero overhead and maximum code reuse

React hook for highly-performant and manipulable animations using Web Animations API.

A mocha report that outputs v8 optimization information on the functions called during testing

Reduce CPU usage by non-blocking async loop and psychologically speed up in JavaScript

Painless universal prerendering for Webpack. Works great with html-webpack-plugin.

A collection of scripts to send Core Web Vital data to GA4

Return a high-resolution time difference.

Benchmark harness.

React window hooks

⏱ Collect and measure browser performance metrics

Day.js with all plugins and locales added out of the box, no need to use dayjs.extend nor dayjs.locale!

Internal utility package for serverless Node.js tracing and monitoring with Instana

Modern ESLint configuration for JavaScript projects focused on best practices and performance optimization

NodeJS performance benchmark

Config utility pack for Seed

Fork of vue-router with improved performance

Cartesian product for big inputs

Easy bechmark framework for Javascript code

Xray your HAR file and know all about the page

Next.js redis cache handler

Button component pack for Seed

An open source framework for building instant loading web apps at any scale, without the extra effort.

Control group object pack for Seed

A collection of embed components for SvelteKit. Easily embed content from YouTube, Spotify, Vimeo, CodePen, and many more with performant, lazy-loaded components.

Dynatrace Node.js OneAgent for PaaS environments

monitor nodejs applications

Nuxt I18n Micro is a lightweight, high-performance internationalization module for Nuxt, designed to handle multi-language support with minimal overhead, fast build times, and efficient runtime performance.

Universal performance measurement APIs

Intelligent CLI tool with AI-powered model selection that analyzes your hardware and recommends optimal LLM models for your system

Core package for the Coach.

A in memory time to live cache with streaming support.

AlphaBase V3.0 - Advanced file-based database with JWT authentication, RSA encryption, audit logging, HTTP server, and comprehensive security features.

Selector-based function pack for Seed

WebGL performance monitor that showing percentage of GPU/CPU load

Super-light error objects.

Spacing utility pack for Seed