v0.14.0 - 2022-07-26

Added

• Added support for the following Wasm proposals:

  • Import and export of mutable globals
  • Non-trapping float-to-int conversions
  • Sign-extension operators
  • Multi-value

  We plan to support more Wasm proposals in the future.

Changed

• Wasmi has been entirely redesigned and reimplemented.
  This work resulted in an entirely new API that is heavily inspired by
  the Wasmtime API,
  a brand new Wasm execution engine that performs roughly 30-40%
  better than the previous engine according to our benchmarks,
  the support of many Wasm proposals and Wasm parsing and validation
  using the battle tested wasmparser
  crate by the BytecodeAlliance.

  The new wasmi design allows to reuse the Wasm execution engine
  resources instead of spinning up a new Wasm execution engine for every
  function call.

  Note: If you plan to use wasmi it is of critical importance
  to compile wasmi using the following Cargo profile settings:

  [profile.release]
  lto = "fat"
  codegen-units = 1

  If you do not use these profile settings you might risk regressing
  performance of wasmi by up to 400%. You can read more about this
  issue here.

Removed

• Removed support for resuming function execution.
  We may consider to add this feature back into the new engine.
  If you are a user of wasmi and want this feature please feel
  free to open an issue
  and provide us with your use case.