jco
memory64
jco | memory64 | |
---|---|---|
9 | 7 | |
523 | 179 | |
8.0% | 2.2% | |
9.4 | 8.5 | |
4 days ago | 7 days ago | |
Rust | WebAssembly | |
Apache License 2.0 | 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.
jco
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WASI 0.2.0 and Why It Matters
> WASI-Preview2's benefits are not going to be realized in a browser, it's more for the non-web world
The jco project (https://github.com/BytecodeAlliance/jco) provides an implementation of the Component Model and WASI Preview 2 for JavaScript systems. Right now, node.js support is complete, but support for Web embeddings is in progress and coming soon.
> These interpreted languages can run in WASM, but only as language interpreter inside the WASM interpreter - so they work, but they are not efficient.
The Bytecode Alliance has made big improvements to SpiderMonkey performance on WASM/WASI systems, and has work in progress to take advantage of SpiderMonkey's "native" codegen targeting WASM: https://cfallin.org/blog/2023/10/11/spidermonkey-pbl/. We targeted JS first for this work because it is the most popular language with our customers and users, but we expect that this will show the path to adding similar improvements to Ruby, Python, and other languages commonly thought of as "interpreted".
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The New Wasmer JavaScript SDK
I use @wasmer/wasi for my npm package `trealla` (wasm port of a Prolog interpreter). For the most part I'm pretty happy with it, but the file size is quite large[1] (taking up around half my bundle size), and it looks like @wasmer/sdk is even larger (wasmer.sh downloads a 1.7MB gzipped wasm binary that I assume is the runtime). It's a tough sell to the frontend folks when my package is this big... currently I have my eye on jco[2] which I hope will be much lighter.
[1]: https://bundlephobia.com/package/@wasmer/[email protected]
[2]: https://github.com/bytecodealliance/jco
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Lightweight, portable and secure Wasm runtimes and their use cases.
You literally write the code in the language you prefer, and given the toolchain is in place -and it's in (experimental or preview) place for JavaScript, with teams working on it, like for example JCO- you can compile with Wasm as target.
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Prettier $20k Bounty was Claimed
The roadmap I linked above. The WASI folks have done a poor job at communicating, no doubt, but I'm surprised someone like yourself literally building a competitor spec isn't following what they are doing closely.
Just for you I did some googling: see here[0] for the current status of WASI threads overall, or here[1] and here[2] for what they are up to with WASI in general. In this PR[3] you can see they enabled threads (atomic instructions and shared memory, not thread creation) by default in wasmtime. And in this[4] repository you can see they are actively developing the thread creation API and have it as their #1 priority.
If folks want to use WASIX as a quick and dirty hack to compile existing programs, then by all means, have at it! I can see that being a technical win. Just know that your WASIX program isn't going to run natively in wasmtime (arguably the best WASM runtime today), nor will it run in browsers, because they're not going to expose WASIX - they're going to go with the standards instead. so far you're the only person I've met that thinks exposing POSIX fork() to WASM is a good idea, seemingly because it just lets you build existing apps 'without modification'.
Comical you accuse me of being polarizing, while pushing for your world with two competing WASI standards, two competing thread creation APIs, and a split WASM ecosystem overall.
[0] https://github.com/bytecodealliance/jco/issues/247#issuecomm...
[1] https://bytecodealliance.org/articles/wasmtime-and-cranelift...
[2] https://bytecodealliance.org/articles/webassembly-the-update...
[3] https://github.com/bytecodealliance/wasmtime/pull/7285
[4] https://github.com/WebAssembly/shared-everything-threads
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WASM by Example
The component model is already shipping in Wasmtime, and will be stable for use in Node.js and in browsers via jco (https://github.com/bytecodealliance/jco) soon. WASI Preview 2 will be done in December or January, giving component model users a stable set of interfaces to use for scheduling, streams, and higher level functionality like stdio, filesystem, sockets, and http on an opt-in basis. You should look at wit-bindgen (https://github.com/bytecodealliance/wit-bindgen) to see some of the languages currently supported, and more that will be mature enough to use very soon (https://github.com/bytecodealliance/componentize-py)
Right now jco will automatically generate the JS glue code which implements a Component Model runtime on top of the JS engine's existing WebAssembly implementation. So, yes, Components are a composition of Wasm Modules and JS code is handling passing values from one module/instance to another. You still get the performance benefits of running computation in Wasm.
One day further down the standardization road, we would like to see Web engines ship a native implementation of the Component Model, which might be able to make certain optimizations that the JS implementation cannot. Until then you can consider jco a polyfill for a native implementation, and it still gives you the power to compose isolated programs written in many languages and run them in many different contexts, including the Web.
(Disclosure: I am co-chair of WASI, Wasmtime maintainer, implemented many parts of WASI/CM)
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Spin 2.0 – open-source tool for building and running WASM apps
(As a side note for the JS support — adapting QuickJS has been extremely helpful in getting JS support out; however, we are in the process of rebuilding the JS runtime using SpiderMonkey (with which a few people on the team have significant experience) and JCO (https://github.com/bytecodealliance/jco), and the web platform compatibility makes it a significantly better proposition for things like 3rd party dependencies).
C# is an interesting one — the .NET team at Microsoft (and in particular Steve Sanderson from that team) has been making tremendous progress in ahead-of-time compilation for .NET and generating Wasm and WASI compatible binaries (as opposed to their initial approach on Blazor), and experimenting with that led us to build support for Spin as well.
Finally, we do a lot to support other popular languages and their Wasm support — two examples: Python (https://github.com/bytecodealliance/componentize-py) and Java / TeaVM (https://github.com/fermyon/teavm-wasi), for which we haven't fully integrated Spin support, but we hope to get there soon.
I hope this explains a bit our process on language support, happy to expand on any point here.
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Extism Makes WebAssembly Easy
That's really useful. This page in particular: https://github.com/bytecodealliance/jco/blob/main/EXAMPLE.md
Being able to run "jco wit cowsay.wasm" to see what interfaces that .wasm file provides solves a problem I've run into a bunch of times in the past.
- Sandboxing JavaScript Code
memory64
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Top 8 Recent V8 Updates
A completed implementation of memory64 for memory-hungry applications.
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Extism Makes WebAssembly Easy
Indeed, webassembly is moving extremely slowly. I started a project years ago expecting https://github.com/WebAssembly/memory-control/blob/main/prop... and https://github.com/WebAssembly/memory64 to be fixed at some point. Neither are yet, and the project still suffers from it to this day.
I think wasm is still great without these fixes, but I have lost confidence in the idea that wasm will reach its full potential any time soon.
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How Photoshop solved working with files larger than can fit into memory
It's in the works: https://github.com/WebAssembly/memory64
Starting with 32bit had some performance advantages because 64bit runtimes can use virtual memory shenanigans to implement bounds checking with zero overhead. In wasm64 they'll have to do explicit bounds checking instead.
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Transformers.js
Right - currently, everything runs using WASM (32-bit, with 64-bit coming soon [1,2]), and I plan to add support for WebGPU soon!
(WebGPU is the successor to WebGL, which is coming out in April 2023 [3])
[1] https://github.com/WebAssembly/memory64/issues/36#issuecomme...
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What was the rational for 32-bit memory addresses in WebAssembly? It seems very short-sighted, considering it only came out pretty recently in 2017
It shouldn't be a big surprise that a 64-bit pointer extension is out there and being worked on. The great thing about a VM is you can integrate major changes like this when they are needed and with the benefit of experience and hindsight. If the 4GB limit turns out to be restrictive then it can be lifted.
- Why Am I Excited About WebAssembly?
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Increasing Smart Contract Canister Memory Proposal is live for review
The goal of this proposal is to increase the amount of memory that canisters can access [eventually] bound only by the actual capacity of the subnet. Since, the Memory64 proposal is not standardized 1 yet and its implementation 1 in Wasmtime is not production ready yet, this proposal enables the increase by introducing a new stable memory API.
What are some alternatives?
componentize-py
interface-types
modsurfer - Devtools to validate, audit and investigate WebAssembly binaries.
wasmtime - A fast and secure runtime for WebAssembly
quickjs-emscripten - Safely execute untrusted Javascript in your Javascript, and execute synchronous code that uses async functions
botnet - Multiplayer programming game using Rust and WebAssembly
extism - The framework for building with WebAssembly (wasm). Easily load wasm modules, move data, call functions, and build extensible apps.
temporal-polyfill - A lightweight polyfill for Temporal, successor to the JavaScript Date object
js-string-builtins - JS String Builtins
proposal-temporal - Provides standard objects and functions for working with dates and times.
zig-spin - 🦎 🪀 Zig SDK for the Spin serverless application framework created by @fermyon.
component-sandbox-demo