Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
winterjs
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LLRT: A low-latency JavaScript runtime from AWS
LLRT is built using Rust, Tokio and QuickJS under the hood.
We (at Wasmer), have been working on a very similar approach: WinterJS, which is using SpiderMonkey instead (but also built on top of Rust and Tokio). https://github.com/wasmer/winterjs
hermes
- Jaws – a JavaScript to WASM ahead of time compiler
- Porffor: A from-scratch experimental ahead-of-time JS engine
- Hermes Sandboxed Runtime
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LLRT: A low-latency JavaScript runtime from AWS
Hermes is a big one as well: low startup latency, low memory
https://hermesengine.dev/
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A list of JavaScript engines, runtimes, interpreters
Hermes
- Implementation of Arrays via Segments (By Hermes for JavaScript)
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Threads uses Compose!
InstagramBundle.js.hbc.spk.xz is likely a compressed version of Hermes bytecode (js.hbc)"
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Removing Timezones from Dates in Javascript
In React Native's case, it uses an engine called Hermes:
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This Week In React-Native #137: Expo Code Elimination, Monorepo, Hermes, Chain React, EAS, Skia, Expo Router, VisionCamera, React-Native-Graph
📜 I made JSON.parse() 2x faster: Radek proposes to improve the performance of Hermes by using very fast C++ libs based on SIMD instructions. Interesting to read even if you don't use React-Native. Ongoing discussions on the Hermes PR.
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I made JSON.parse() 2x faster
Thanks! There's a preliminary PR with a discussion here: https://github.com/facebook/hermes/pull/933 (and broader context here: https://github.com/facebook/hermes/issues/811 ). But we'll see if there's any interest on Hermes' side to merging it. They definitely want to improve the parser, but it's unclear to me if they want to take on the simdjson/simdutf dependencies.
What are some alternatives?
pljs - PLJS - Javascript Language Plugin for PostreSQL
v8.dev - The source code of v8.dev, the official website of the V8 project.
winterjs - Winter is coming... ❄️
react-native-debugger - The standalone app based on official debugger of React Native, and includes React Inspector / Redux DevTools
llrt - LLRT (Low Latency Runtime) is an experimental, lightweight JavaScript runtime designed to address the growing demand for fast and efficient Serverless applications.
nodejs-mobile - Full-fledged Node.js on Android and iOS
workerd - The JavaScript / Wasm runtime that powers Cloudflare Workers
dayjs - ⏰ Day.js 2kB immutable date-time library alternative to Moment.js with the same modern API
quickjspp - Port of QuickJS Javascript Engine.
react-native-quick-base64 - A fast base64 module for React Native
react-native-skia - High-performance React Native Graphics using Skia
repack - A Webpack-based toolkit to build your React Native application with full support of Webpack ecosystem.