bytecodealliance/wasmtime v21.0.0

on GitHub

21.0.0

Released 2024-05-20.

Added

• The wasmtime explore subcommand now supports *.wat files.
  #8314

• Wasmtime now supports DWARF Fission *.dwp files.
  #8055

• The wasmtime crate now supports #![no_std], and more information about
  this transition can be found in
  #8341.
  #8463
  #8483
  #8485
  #8528
  #8533

• A Config knob is now available for one-entry call_indirect caching to
  speed up modules with lots of call_indirect instructions.
  #8509

• Cranelift's riscv64 backend has initial support for the Zfa Extension.
  #8536

• The WebAssembly tail-calls proposal is now enabled by default when using the
  Cranelift backend, except for the s390x architecture.
  #8540

Changed

• Support for NaN canonicalization on x64 has been optimized to avoid branches.
  #8313

• The bindgen! macro now defaults to assuming imports cannot trap, but this
  behavior is configurable at macro-generation time.
  #8310

• The fd_{read,write} implementations in wasmtime-wasi have been optimized.
  #8303

• The wasmtime-wasi-http crate has been refactored and has improved
  documentation.
  #8332
  #8347

• Unused with parameters in bindgen! now generate an error.
  #8371

• The fd_read implementation in wasmtime-wasi now only reads into a single
  iovec per call.
  #8415

• The wasmtime_val_t type in the C API no longer holds any allocations. This
  type must still be manually managed to properly unroot values, however.
  #8451

• Add an optimized "sleep" path for poll_oneoff to wasmtime-wasi.
  #8429

• The Wasmtime-internal wasmtime-runtime crate has been removed.
  #8501

• The pooling allocator now allows twice as many elements as before.
  #8527

• Using CMake to build the C API has been improved along a number of axes.
  #8490
  #8497
  #8549

Fixed

• Pooling allocator CLI options are now respected with the wasmtime serve
  subcommand.
  #8525

• The read implementation for file input streams in wasmtime-wasi now
  correctly handles zero-length reads.
  #8611