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Merge pull request #3590 from rlane/memory-view

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Optimize getting byteLength in MemoryView::new
This commit is contained in:
Syrus Akbary
2023-02-17 16:24:00 -08:00
committed by GitHub
parent 73d6c48e72 b5f288830c
commit 8696abd29e
1 changed files with 6 additions and 4 deletions
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10
lib/api/src/js/externals/memory_view.rs vendored
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@ -6,6 +6,7 @@ use std::mem::MaybeUninit;
use std::slice;
#[cfg(feature = "tracing")]
use tracing::warn;
use wasm_bindgen::JsCast;
use wasmer_types::{Bytes, Pages};
@ -33,10 +34,11 @@ impl<'a> MemoryView<'a> {
pub(crate) fn new_raw(memory: &js_sys::WebAssembly::Memory) -> Self {
let buffer = memory.buffer();
let size = js_sys::Reflect::get(&buffer, &"byteLength".into())
.unwrap()
.as_f64()
.unwrap() as u64;
// This also works for SharedArrayBuffer.
let size = buffer
.unchecked_ref::<js_sys::ArrayBuffer>()
.byte_length()
.into();
let view = js_sys::Uint8Array::new(&buffer);