wasi: use WasmMemoryObject handle for perf - #43544
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devsnek merged 1 commit intoJun 25, 2022
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June 23, 2022 06:32
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src/node_wasi.cc
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| Local<ArrayBuffer> ab = prop.As<ArrayBuffer>(); | ||
| std::shared_ptr<BackingStore> backing_store = ab->GetBackingStore(); | ||
| Local<WasmMemoryObject> memory = PersistentToLocal::Strong(this->memory_); |
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tiny and very ignorable style nit:
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| Local<WasmMemoryObject> memory = PersistentToLocal::Strong(this->memory_); | |
| Local<WasmMemoryObject> memory = PersistentToLocal::Strong(memory_); |
More directly, why are we not going on step further and storing the std::shared_ptr<BackingStore> here? That should be even faster.
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the arraybuffer gets detached every time the wasm grows its memory. very annoying problem, maybe it will be fixed one day: https://github.com/tc39/proposal-resizablearraybuffer#sync-up-capability-with-webassembly-memorygrow
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PR-URL: #43544 Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net>
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PR-URL: #43544 Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net>
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PR-URL: #43544 Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net>
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PR-URL: #43544 Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net>
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PR-URL: #43544 Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net>
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Store WebAssembly.Memory handle as a WasmMemoryObject, which lets us directly grab the ArrayBuffer instead of doing a property lookup in this hot path.