Crate sc_executor_wasmtime

Defines a WasmRuntime that uses the Wasmtime JIT to execute.

You can choose a profiling strategy at runtime with environment variable WASMTIME_PROFILING_STRATEGY:

WASMTIME_PROFILING_STRATEGY	Effect
undefined	No profiling
"jitdump"	jitdump profiling
other value	No profiling (warning)

Structs

• Config
• DeterministicStackLimit
  Knobs for deterministic stack height limiting.
• RuntimeBlob
  A program blob containing a Substrate runtime.
• Semantics
• WasmtimeRuntime
  A WasmModule implementation using wasmtime to compile the runtime module to machine code and execute the compiled code.

Enums

• HeapAllocStrategy
  Defines the heap pages allocation strategy the wasm runtime should use.
• InstantiationStrategy
  The instantiation strategy to use for the WASM executor.

Traits

• WasmModule
  A trait that defines an abstract WASM runtime module.

Functions

• create_runtime
  Create a new WasmtimeRuntime given the code. This function performs translation from Wasm to machine code, which can be computationally heavy.
• create_runtime_from_artifact^⚠
  The same as create_runtime but takes a path to a precompiled artifact, which makes this function considerably faster than create_runtime.
• create_runtime_from_artifact_bytes^⚠
  The same as create_runtime but takes the bytes of a precompiled artifact, which makes this function considerably faster than create_runtime, but slower than the more optimized create_runtime_from_artifact. This is especially slow on non-Linux Unix systems. Useful in very niche cases.
• prepare_runtime_artifact
  Takes a RuntimeBlob and precompiles it returning the serialized result of compilation. It can then be used for calling create_runtime avoiding long compilation times.