velzieandClaude Opus 5.5 864e83143c gex-cache: a large dynamic-offset element segment compiled as table.init ...

wasmtime compiles a position-independent module's active element segment
(at global.get __table_base) into its startup code, one table store per
slot; a program's million slots took register allocation hours. A
segment of over 16384 slots is now made passive and filled by one
table.init at the head of the start function, in memory, for wasmtime's
compile only: the cache keys and the shipped module are unchanged (V8
fills an active segment lazily, and a table.init eagerly). Measured, the
rewrite compiles a 64k-slot segment in 1.2 s against 4.0 s.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_853378b774d645b4ac78b16d9af91a31

2026-11-12 10:00:25 -05:00

..

src

gex-cache: a large dynamic-offset element segment compiled as table.init

2026-11-12 10:00:25 -05:00

Cargo.toml

Cargo.toml: a description for every crate

2026-10-27 11:23:55 -04:00