Use Custom Rust Targets for Shared Wasm Libraries

dfinity / motoko

Simple high-level language for writing Internet Computer canisters

Apache License 2.0

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Use Custom Rust Targets for Shared Wasm Libraries #4683

Closed luc-blaeser closed 1 month ago

luc-blaeser commented 2 months ago

Simplify Motoko RTS building:

Use custom Rust targets for generating PIC-relocatable Wasm.
Get rid of emscripten or explicit compilation via LLVM IR.
Get rid of musl (until now, it was only used for classical persistence).
Optimization: Use bulk-memory operations because memcpy of Rust is slower than musl.
No need for the wasm-ld fix as the custom targets do not generate corresponding DSO-local relative table index relocations (https://github.com/llvm/llvm-project/pull/104043).

github-actions[bot] commented 2 months ago

Comparing from a6d1305b087e5968ddba40452cacaa0ef1223a80 to 0b196f851888fe50ad8e53b5ab7a4be647bbe5e6: In terms of gas, 5 tests regressed and the mean change is +0.0%. In terms of size, 5 tests improved and the mean change is -41.1%.