6.0.9

umputun/ralphex6.0.9Sep 1, 2026by emscripten-bot

Upgrading?

AI Summary

Marks WASM_BINDGEN as experimental and updates cache paths to use `WebAssembly.instantiateStreaming` for better overlap.

Key Highlights

  • `WASM_BINDGEN` setting is now marked experimental
  • `-sCROSS_ORIGIN_STORAGE` cache paths now use `WebAssembly.instantiateStreaming()`

New Features

  • Experimental WASM_BINDGEN status with compiler warning
  • Streaming cache improvements using `Blob.stream()` and `tee()`

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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