chessmadra-frontend
quickjs-emscripten
chessmadra-frontend | quickjs-emscripten | |
---|---|---|
27 | 21 | |
51 | 1,137 | |
- | - | |
0.0 | 9.4 | |
5 months ago | 4 days ago | |
TypeScript | TypeScript | |
- | GNU General Public License v3.0 or later |
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.
chessmadra-frontend
-
Is the narjdof scilian too difficult for a 1500 rapid rated player?
Create a repertoire with ChessMadra
-
The Best Chess Resources 2nd Edition
Listudy: Memorise openings with spaced repetition. Chess Endgame Training Chessercise: Practice chess with YouTube. Chess Madra: Build and practise an opening repertoire. Aimchess: Learn your strengths and weaknesses.
-
Best Free Chess Resources in 2023
Chess Madra for building and practicing an opening repertoire.
- Tools to drill opening lines as both black and white?
-
is it too early for me to learn sicillian/najdorf
Also there is always Chessmadra where you can build an opening repertoire tailored to the moves you encounter at your rating.
-
Website for opening training
Check out ChessMadra. It's more of an opening repertoire builder than "randomly selected", but with spaced repetition.
- Resources for studying chess openings
-
I wanna learn this openning buttt,
It doesn't make much sense to study openings to an absurd depth, as you said. Opening principles are much more important as soon as you are taken out of book. But It should be possible to build your repertoire with the Catalan in mind for your rating range with ChessMadra. Put in your rating range, build and drill it.
- Why are most Masters making this play?
-
What is your favorite resource for learning openings.
I use chessmadra.com. Works pretty well for building a repertoire and practicing, plus had access to lichees opening database. Is completely free.
quickjs-emscripten
-
New QuickJS Release
Based on your comment below I think you figured out the difference - but if you're looking to execute JS, you can pick between ShadowRealm (where available, or using a polyfill) or my library quickjs-emscripten.
Pros of quickjs-emscripten over ShadowRealm:
- You can use quickjs today in any browser with WASM. ShadowRealm isn't available yet, and polyfills have had security issues in the past. See https://www.figma.com/blog/an-update-on-plugin-security/
- In ShadowRealm eval, untrusted code can consume arbitrary CPU cycles. With QuickJS, you can control the CPU time used during an `eval` using an [interrupt handler] that's called periodically during the eval.
- In ShadowRealm eval, untrusted code can allocate arbitrary amounts of memory. With QuickJS, you can control both the [stack size] and the [heap size] available inside the runtime.
- quickjs-emscripten can do interesting things with custom module loaders and facades that allow synchronous code inside the runtime to call async code on the host.
Pros of ShadowRealm over QuickJS:
- ShadowRealm will (presumably?) execute code using your native runtime, probably v8, JavaScriptCore, or SpiderMonkey. Quickjs is orders of magnitude slower than JIT'd javascript performance of v8 etc. It's also slower than v8/JSC's interpreters, although not by a huge amount. See [benchmarks] from 2019.
- You can easily call and pass values to ShadowRealm imported functions. Talking to quickjs-emscripten guest code requires a lot of fiddly and manual object building.
- Overall the quickjs(-emscripten) API is verbose, and requires manual memory management of references to values inside the quickjs runtime.
[interrupt handler]: https://github.com/justjake/quickjs-emscripten/blob/main/doc...
[stack size]: https://github.com/justjake/quickjs-emscripten/blob/main/doc...
[heap size]: https://github.com/justjake/quickjs-emscripten/blob/main/doc...
[benchmarks]: https://bellard.org/quickjs/bench.html
-
Extism Makes WebAssembly Easy
The thing I want to achieve with WebAssembly is still proving a lot harder than I had anticipated.
I want to be able to take strings of untrusted code provided by users and execute them in a safe sandbox.
I have all sorts of things I want this for - think custom templates for a web application, custom workflow automation scripts (Zapier-style), running transformations against JSON data.
When you're dealing with untrusted code you need a really robust sandbox. WebAssembly really should be that sandbox.
I'd like to support Python, JavaScript and maybe other languages too. I want to take a user-provided string of code in one of those languages and execute that in a sandbox with a strict limit on both memory usage and time taken (so I can't be crashed by a "while True" loop). If memory or time limit are exceeded, I want to get an exception which I can catch and return an error message to the user.
I've been exploring options for this for quite a while now. The furthest I've got was running Pyodide inside of Deno: https://til.simonwillison.net/deno/pyodide-sandbox
Surprisingly I've not found a good pattern for running a JavaScript interpreter in a WASM sandbox yet. https://github.com/justjake/quickjs-emscripten looks promising but I've not found the right recipe to call it from server-side Python or Deno yet.
Can Extism help with this? I'm confident I'm not the only person who's looking for a solution here!
-
Node on Web. Use Nodejs freely in your browser with Linux infrastructure.
"Safely execute untrusted Javascript in your Javascript, and execute synchronous code that uses async functions" quickjs-emscripten, NPM
-
Sandboxing JavaScript Code
This maybe, as a start?
https://github.com/justjake/quickjs-emscripten
-
Hacker News top posts: Nov 20, 2022
QuickJS Running in WebAssembly\ (17 comments)
-
QuickJS Running in WebAssembly
The library was inspired by Figma’s blog posts about their plug-in system: https://github.com/justjake/quickjs-emscripten#background
-
Show HN: Run unsafe user generated JavaScript in the browser
If you need to call into user-generated Javascript synchronously or have greater control over the sandbox environment, you can use WebAssembly to run a Javascript interpreter: https://github.com/justjake/quickjs-emscripten#quickjs-emscr...
QuickJS in WebAssembly is much slower than your browser's native Javascript runtime, but possibly faster than async calls using postMessage. As an added bonus, it can make async functions in the host appear to be synchronous inside the sandbox using asyncify: https://emscripten.org/docs/porting/asyncify.html.
-
Why Would Anyone Need JavaScript Generator Functions?
You can use One Weird Trick with generator functions to make your code "generic" over synchronicity. I use this technique to avoid needing to implement both sync and async versions of some functions in my quickjs-emscripten library.
The great part about this technique as a library author is that unlike choosing to use a Promise return type, this technique is invisible in my public API. I can write a function like `export function coolAlgorithm(getData: (request: I) => O | Promise): R | Promise`, and we get automatic performance improvement if the user's function happens to return synchronously, without mystery generator stuff showing up in the function signature.
Helper to make a function that can be either sync or async: https://github.com/justjake/quickjs-emscripten/blob/ff211447...
Uses: https://cs.github.com/justjake/quickjs-emscripten?q=yield*+l...
-
Why Am I Excited About WebAssembly?
This seems like a pretty nice, recently enabled way of getting a sandboxed js environment: QuickJS compiled to WASM: https://github.com/justjake/quickjs-emscripten.
What are some alternatives?
macrome - The in-tree build system
wasmtime - A fast and secure runtime for WebAssembly
listudy - Listudy - chess training server
wasmer - 🚀 The leading Wasm Runtime supporting WASIX, WASI and Emscripten
lila-openingexplorer - Opening explorer for lichess.org that can handle all the variants and trillions of unique positions
wizer - The WebAssembly Pre-Initializer
rsyscall - Process-independent interface to Linux system calls
rr - Record and Replay Framework
codespan - Beautiful diagnostic reporting for text-based programming languages.
go - The Go programming language
DevUtils-app - All-in-one Toolbox for Developers. Native macOS app.
iPlug2 - C++ Audio Plug-in Framework for desktop, mobile and web