JSPM

Bind data arrays to any type of JS objects

the fastest version of Function#bind I could make

Downloading and running time plugin for Size Limit

Run grunt tasks concurrently

Webpack plugin for Size Limit

Evaluates how long the browser will execute your javascript code

benchmark tooling that loves you ❤️

This is a library for optimizing performance sensitive events and declarative preventDefault and stopPropagation

Small timing library

Clinic.js diagnoses your performance issues

React hook to measure an element's size and handle responsive components.

simple high resolution timing

A storybook addon to help better understand and debug performance for React components

The simplest and lightweight solution for User Timing API in Javascript.

LazyLoad is a lightweight (2.4 kB) and flexible script that speeds up your web application by deferring the loading of your below-the-fold images, videos and iframes to when they will enter the viewport. It's written in plain "vanilla" JavaScript, it leve

Core performance client

Generate HAR file with Puppeteer

WebdriverIO service for analyzing test flow performance

Universal bundle analyzer and visualizer that works with most popular bundlers and frameworks.

Conversational ServiceNow development platform using Claude Code. Multi-agent orchestration with 20+ MCP servers providing 200+ ServiceNow tools for comprehensive platform development.

Easily monitor your ThreeJS performances.

Send WebVitals from your Next.js project to Axiom.

webpack speed booster, makes you happy!

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

Command-line interface for tw-enigma CSS optimization

The core Node library used to integrate with Codspeed runners

A bluebird wrapper for node-mysql

Speed up eslint to accelerate your development workflow

A fast Mersenne Twister

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).

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

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.

Generate critical path CSS for web pages

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

User Timing polyfill

Perform data joins with any type of JS objects

vitest plugin for CodSpeed

Size Limit preset for applications

@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

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

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

Parse performance test results from JMeter and many more

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

Core library for Instana's Node.js packages

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

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

infinite-scroll, done right. done.

Size Limit preset for big open source libraries

Mixins that manage rendered CSS from modular importing

measure startup time of your react-native app

A performant virtual scrolling list library

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.

Optimize the speed of important tasks on limited ressources

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.

Performance optimization tools for OrdoJS applications

Customize scrollbar in modern browsers with smooth scrolling experience.

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

A JavaScript library for zooming images like Medium

Smooth page transitions, smart preloading and more in Astro

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

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

A d3.js library to produce flame graphs.

Better Stack Telemetry Next.js client

requestAnimationFrame pool to avoid busyness on the thread

redux store enhancer which allows batching subscribe notifications.

The linting tool for the web

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

Like Underscore, but lazier

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

Compress 🗜️

request animation frame

Automatically sort your head with capo.js in Astro

webhint's recommended hints configuration for live websites

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

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

Collection of utilities for InfernoJS

Generate performance statistics for async or sync functions

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

[![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

Run gulp tasks in separate cpu processes

Breakpoints mixin pack for Seed

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.

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

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

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

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

esbuild plugin for Size Limit

@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.

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

Webpack Statoscope plugin for Size Limit

Min Heap

Fast and small Node.js Worker_Threads and Cluster Worker Pool

Inspect module load time with performance.measure

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

Lazily render react components

Compress 🗜️

High performance debug logging

Benchmark.js compatibility layer for CodSpeed

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

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

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

A gzip, brotli and zstd compressor for Astro

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

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

A thin wrapper around fetch that prevents duplicate requests.

[![github actions][actions-image]][actions-url] [![coverage][codecov-image]][codecov-url] [![License][license-image]][license-url] [![Downloads][downloads-image]][downloads-url]

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

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

memoize the last result, in async way

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

Blazing fast flame graphs for V8 and Node

A high-performance charting library.

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

Use Qwik components and Resumability within Astro

Functional CSS for humans

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

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.

Use Alpine within Astro

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

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

Performance optimization helper for React applications

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

ObserveRTC Client Integration Javascript Library

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.

The modular and type-safe form library for Qwik

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.

react StaticContainer

Measure Babel compilation time

WebPageTest API wrapper for NodeJS

Fast and consistently responsive apps using a single function call

Border theme pack for Seed

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

Cutting edge GraphQL planning and execution engine

Lazy loading for express router

Imagemin meets Rollup!

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

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 fastest function for deep clone js objects compatible with es6

The modular and type-safe form library for SolidJS

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

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

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.

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

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

A simple requestAnimationFrame wrapper with added iteratee creator.

AI-powered React performance monitoring with MCP integration

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

An opentracing implementation for zipkin

Constant for better performance

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

Core business logic for the used by the Code PushUp CLI

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

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

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.

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

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

An in-memory caching (memoization) decorator for Typescript

Native bindings for valkey-glide on darwin-arm64

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

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.

A Fast & Light Virtual DOM Alternative

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

Inline 🦔

* [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

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

Web Vitals for Nuxt.js

🔌⚡ 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

A modern benchmarking library for Node.js

Performance focused, lightweight scroll animation library

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

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

Check load performance of your module and its dependencies

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 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.

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.

Convert LI-HAR to k6 script

Benchmark runner for NodeJS

LightWeight, dependency free, javascript object cleaning library

React Native library for detecting component visibility in the viewport.

automatic redis pipeline

Native bindings for valkey-glide on darwin-x64

A SVG-based LQIP image placeholder generator

Package to assist with collection of metrics, including stopwatch functionality

Return a high-resolution time.

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

Webpack plugin to support css for Size Limit

Automatic performance and profiling instrumentation for your jest tests.

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

React implementation of smooth-scrollbar

Write very fast map/filter/reduce code

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

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

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.

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

React window hooks

A collection of standard data-structures for node and browser

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

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

Return a high-resolution time difference.

Benchmark harness.

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

⏱ Collect and measure browser performance metrics

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

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

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

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

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

Next.js redis cache handler