v0.39.0 - 2024-11-04

Added

• Add new Linker APIs. #1281
  • Linker::instance: conveniently add exports from an instance to a linker.
  • Linker::alias_module: alias module definitions via another name.
  • Linker::allow_shadowing: enable to shadow previous definitions without errors.
• Add hash-collections and prefer-btree-collections crate features to the wasmi crate. #1265
  • This allows for more fine grained control over Wasmi
    dependencies to further decrease compile times.
• Add lowering of compare instructions and fused branch+compare instructions. #1243
  • This improved performance for certain workloads and
    reduced the total Wasmi instruction count significantly.
  • Wasm coremark results improved to 1830 (v0.39) from 1701 (v0.38).

Fixed

• Fixed a bug in translation of fused cmp+branch instructions with huge offsets.
  • This was fixed as a side product in #1243.

Removed

• Removed the no-hash-maps crate feature. #1265
• Removed some minor wasmi crate dependencies. #1266 #1267
  • This should improve compile times of the wasmi crate slightly.

Internal

• Modernize fuzzer and significantly improve fuzzing test coverage.
  • Reworked differential fuzzing entirely. #1257
    • This also improves handling of non-deterministic behavior
      between Wasm runtimes in differential fuzzing.
  • Add wasmi_fuzz crate for better code organization. #1252
  • Merged translate and translate_metered fuzzers. #1249
• Modernize Wasmi .wast directives runner. #1279
  • Overall this significantly improved readability and maintainability
    of the Wasmi .wast directives runner.