6.0.9
parruda/swarm6.0.9Sep 1, 2026by emscripten-bot
Upgrading?
AI Summary
Marks the `WASM_BINDGEN` setting as experimental and improves cache streaming performance for cross-origin storage by using `WebAssembly.instantiateStreaming()`.
Key Highlights
- `WASM_BINDGEN` setting marked as experimental
- Cache hit/miss paths use `WebAssembly.instantiateStreaming()`
- Improved download/compile overlap for cross-origin storage
New Features
- Experimental WASM_BINDGEN setting
- Improved streaming cache performance
Full Release Notes
## What's Changed - The `WASM_BINDGEN` setting is now marked experimental, and enabling it produces a compiler diagnostic warning, since the integration is still evolving and subject to change. (#27616) - The `-sCROSS_ORIGIN_STORAGE` cache-hit and cache-miss paths now use `WebAssembly.instantiateStreaming()` (via `Blob.stream()` and a `tee()`'d network body respectively), so enabling the flag no longer loses the download/compile overlap of the standard streaming path. (#27609) ## Contributors Thanks to the following contributors: @sbc100 (17) @brendandahl (3) @guybedford (3) @tomayac (2) @dschuff (1) **Full Changelog**: https://github.com/emscripten-core/emscripten/compare/6.0.8...6.0.9
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