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745b16e3d2
This commit adds support for the recently implemented standard of [`TextEncoder#encodeInto`][standard]. This new function is a "bring your own buffer" style function where we can avoid an intermediate allocation and copy by encoding strings directly into wasm's memory. Currently we feature-detect whether `encodeInto` exists as it is only implemented in recent browsers and not in all browsers. Additionally this commit emits the binding using `encodeInto` by default, but this requires `realloc` functionality to be exposed by the wasm module. Measured locally an empty binary which takes `&str` previously took 7.6k, but after this commit takes 8.7k due to the extra code needed for `realloc`. [standard]: https://encoding.spec.whatwg.org/#dom-textencoder-encodeinto Closes #1172 |
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