jerryscript
Ultra-lightweight JavaScript engine for the Internet of Things. (by jerryscript-project)
hermes
A JavaScript engine optimized for running React Native. (by facebook)
Our great sponsors
| jerryscript | hermes | |
|---|---|---|
| 14 | 42 | |
| 6,818 | 9,347 | |
| 0.5% | 1.1% | |
| 5.6 | 9.8 | |
| 10 days ago | 2 days ago | |
| C | C++ | |
| Apache License 2.0 | MIT License |
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
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.
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.
jerryscript
Posts with mentions or reviews of jerryscript.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2023-12-10.
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A list of JavaScript engines, runtimes, interpreters
JerryScript
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JavaScript Runtime and Code Lifecycle
Some IoT platforms use Duktape and JerryScript as their engines.
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DeviceScript: TypeScript for Tiny IoT Devices
I've been having a lot of fun with https://kalumajs.org/ recently for silly JS embedded things. It's been great so far, and has a cool little community!
It's a runtime built on top of JerryScript, which has been pretty neat to look into as well: https://jerryscript.net/
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Good example open source C++ embedded projects
Jerryscript came to mind : https://github.com/jerryscript-project/jerryscript
- Arduino Announces MicroPython Support
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JavaScript embedded inside Elixir
I personally quite like JerryScript
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Kaluma - tiny JavaScript runtime for microcontrollers - includes a browser-based IDE that can communicate with a Raspberry Pi Pico and other RP2040 boards via Web Serial API. Write code in the browser (in JavaScript), then copy and run it on the board with a click of a button.
Based on JerryScript, the creators also provide an IDE and serial communication tool on their website. There's also ample documentation and guides. Looking forward to getting more into this.
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TypeScript is the Only Programming Language you Need: TypeScript Everywhere
I hear you loud and clear.
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Can the PineTime Watch stream music without a phone? (Onboard music storage)
There are subsets of JS for embedded device e.g. Espruino https://github.com/espruino/Espruino for BangleJS https://shop.espruino.com/banglejs also with 4MB or JerryScript https://jerryscript.net
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Txiki.js: Tiny JavaScript runtime built with QuickJS and libuv
Fitbit uses Jerryscript in some of their watch OSes. Well, at least they were last time I was tinkering with making my own watch face
hermes
Posts with mentions or reviews of hermes.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2024-02-08.
- 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
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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
đź“ś 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.
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Hermes, an Open Source Document Management System
For me it’s a JS engine for React Natve - https://hermesengine.dev/
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Don't pay for painfully slow React Native iOS builds anymore.
💉 Building and injecting a JS bundle a basic concept: If the native code wasn’t changed, simply create JS bundle and inject it into the precompiled application. (You must take an extra step to convert a js file to bytecode if you use the Hermes js engine.)
What are some alternatives?
When comparing jerryscript and hermes you can also consider the following projects:
quickjs - Public repository of the QuickJS Javascript Engine.
react-native-debugger - The standalone app based on official debugger of React Native, and includes React Inspector / Redux DevTools
Duktape - Duktape - embeddable Javascript engine with a focus on portability and compact footprint
v8.dev - The source code of v8.dev, the official website of the V8 project.
MicroPython - MicroPython - a lean and efficient Python implementation for microcontrollers and constrained systems
nodejs-mobile - Full-fledged Node.js on Android and iOS
Espruino - The Espruino JavaScript interpreter - Official Repo
dayjs - ⏰ Day.js 2kB immutable date-time library alternative to Moment.js with the same modern API
quickjspp - Port of QuickJS Javascript Engine.
just - the only javascript runtime to hit no.1 on techempower :fire:
react-native-quick-base64 - A fast base64 module for React Native