⏱ Collect and measure browser performance metrics
tool to measure metrics like fcp ttfb windowload domload
This is the implementation of the Profiler for iOS app. It uses [py-ios-device](https://github.com/YueChen-C/py-ios-device) to poll CPU, RAM and FPS data in real time.
A performance monitor library for cspell.
Measure React Native performance
Calculate metrics of a font
Simple to use, blazing fast and thoroughly tested websocket client and server for Node.js
Matrix Client-Server SDK for Javascript
Measure + analyse the speed of your webpack loaders and plugins
High performance (de)compression in an 8kB package
Fast, accurate & comprehensive text measurement & layout
User Timing polyfill
The Jest Measure library implements APIs for writing benchmaks to profile and verify the performance of your code when using the Jest unit testing library.
MCP server for Chrome DevTools
A shim for the setImmediate efficient script yielding API
Isomorphic ponyfill wrapping native browser performance and node.js perf_hooks performance
Server-side rendering for AMPs.
Get performance metrics from your web page using Browsertime.
Compute measurements of React components.
Measure process load
A CSS parser, transformer, and minifier written in Rust
Hook that measure and track a element dimensions
Create and modify PDF files with JavaScript
## Usage This package contains Performance APIs, distributed as part of the Kepler Performance Module (kepler-performance-api) npm package. See [this page](https://developer.amazon.com/docs/kepler/ks-measure-app-kpis.html#prerequisites) for more context.