2057660 - We're using rust's compiler_builtins for fmod, rather than glibc (on linux)

Status: NEW

(Core :: JavaScript Engine, task, P4)

Description

[Matthew Gaudet (he/him) [:mgaudet]]

Which is important because the glibc one is appreciably faster than the compiler_builtin one. 2-3x faster.

It's unclear if this is shell only at the moment; but in the shell we get

libjs_static.a
libpure_virtual.a
libjsrust.a
-lm

When libjsrust.a is processed, fmod is unresolved, so its weak implementation is extracted before glibc is considered.

(looking into browser as we speak too)