PApaulgb·Nov 20, 2022
I’m not sure if anyone has done so yet for Go, but Shopify has done this for Rust.
https://github.com/Shopify/javy/tree/main/crates/quickjs-was...
In QuickJS Running in WebAssemblybytecodealliance
javy
Rust2022–2026
bytecodealliance / javy
javy
JS to WebAssembly toolchain
10Distinct people
11Mentions
1Explicit recommenders
2.8KGitHub stars
What to know before exploring
What it is
JS to WebAssembly toolchain
GitHub
Where it is used
No documented product use has been verified yet.
What people are saying
I recommend trying Javy[0]. Javy allows you to build a WASM file that includes Javy's JS interpreter along with your JS source code. Note that Javy is a heavily sandboxed…
arjunbajaj used a recommendation phrase. One indexed comment matches. This is a phrase match, not a verdict.
No classified warning is attached to this page. Read the discussions before treating silence as approval.
Also in these discussions
No other repository is repeatedly linked in the same discussions.
This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 11:23:53 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by year11 dated mentions
Observed mentions: 2022-09-20 18:07:28 UTC to 2026-01-09 22:39:03 UTC.
* An incomplete calendar period is marked with an outlined bar. Its count is not directly comparable with a full period.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 2 | 0 | 2 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 5 | 0 | 5 |
| 2024 | 2024-01-01 00:00:00 UTC | 2025-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2025 | 2025-01-01 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 3 | 0 | 3 |
| 2026 (partial) | 2026-01-01 00:00:00 UTC | 2027-01-01 00:00:00 UTC | 1 | 0 | 1 |
What Hacker News says
2 sources> - JS is notably missing from the list of languages supported on the front page. But I see mentions of a Spidermonkey.wasm in the blog post. Is running JS on top of wasmtime in production a realistic prospect today? If so, where can I read more? (mainly interested in this for the instantiation time benefits, though maybe all/most of that will be negated by the embedded JS engine?)
Shopify and others use QuickJS as their JS engine of choice. See https://github.com/Shopify/javy as a starting point. The real benefit is allowing authors of plugins to write JS and not AssemblyScript, not any performance or instantiation time benefits.
> - How should I go about building a typical web service on top of wasmtime? Can wasmtime itself handle network requests/connections or would I need to build the web server in some other host language and pass r
Read the rest
equest data to wasmtime modules? Haven't been able to find anything in the docs about this.
There are a lot of choices for this. None I would consider mature, but some leads:
- https://github.com/deislabs/wagi
- https://suborbital.dev/
- https://github.com/fermyon/spin
They handle the passing of data between host and guest for you. Your module, written in a language that compiles down to wasm, is evaluated against the request. They make host functionality, such as the ability to make other network calls, available to your module as needed.
> - What would it take to build a multitenant web service where customer code is isolated using wasmtime, like the one like described in the post?
See suborbital linked above. Not much. This is the primary current use case for server side wasm.