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Use instantiateStreaming for --no-modules mode if possible

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Anton Danilkin
2018-08-04 02:10:46 +03:00
committed by Alex Crichton
parent 94fe55ce80
commit 9c275d1f1d
1 changed files with 13 additions and 7 deletions
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12
crates/cli-support/src/js/mod.rs
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@ -406,10 +406,16 @@ impl<'a> Context<'a> {
const __exports = {{}};
{globals}
function init(wasm_path) {{
return fetch(wasm_path)
const fetchPromise = fetch(wasm_path);
let resultPromise;
if (typeof WebAssembly.instantiateStreaming === 'function') {{
resultPromise = WebAssembly.instantiateStreaming(fetchPromise, {{ './{module}': __exports }});
}} else {{
resultPromise = fetchPromise
.then(response => response.arrayBuffer())
.then(buffer => WebAssembly.instantiate(buffer, {{ './{module}': __exports }}))
.then(({{instance}}) => {{
.then(buffer => WebAssembly.instantiate(buffer, {{ './{module}': __exports }}));
}}
return resultPromise.then(({{instance}}) => {{
wasm = init.wasm = instance.exports;
return;
}});