V8 used to have an API to directly create a Wasm module from serialized
bytes. It was removed in https://crrev.com/c/2033171. We could bring it
back if there is use for it (it would need some tests then, which were
missing before).
On Thu, Dec 31, 2020 at 11:32 AM Nick Zavaritsky <mej...@gmail.com> wrote:
> Forgot to mention that implementing a
> standards-conforming WebAssembly.compileStreaming in Node.js is probably
> not an option. There's no Request in Node.js to start with. The feature is
> covering local files only. Hence the proposal introduces a cache-enabled
> loader as a custom api (e.g. require("wasm/cache").loadFile(path) ).
>
> The problem is that there's a single global WasmStreaming callback.
> Hijacking it makes future implementation of the proper
> WebAssembly.compileStreaming unnecessary cumbersome (if it comes to be).
> Even though Node.js itself probably isn't going to need it in foreseeable
> future, Node is often embedded in larger projects (e.g. Electron). Barring
> them from having this opportunity makes Node.js maintainers unhappy.
>
> Best,
> N
>
> On Thursday, 31 December 2020 at 13:13:44 UTC+3 Nick Zavaritsky wrote:
>
>> Hi!
>>
>> There's currently no compiled module cache for WASM modules in Node.js.
>> I've started an effort to make one (
>> https://github.com/nodejs/node/issues/36671). There's a POC already.
>>
>> The POC hijacks WebAssembly.compileStreaming. It uses
>> v8::WasmStreaming::SetCompiledModuleBytes to deserialise a cached module.
>> Please let me know if there's a cleaner approach.
>>
>> Best,
>> N
>>
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