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| author | Alan Wu <[email protected]> | 2024-10-08 11:44:59 -0400 |
|---|---|---|
| committer | GitHub <[email protected]> | 2024-10-08 11:44:59 -0400 |
| commit | ded078c2c44e5a1f9f4191a7021cfe394ac93ba2 (patch) | |
| tree | 583df72f394de2d873780aba7ce8f90d8cb3ce34 /variable.c | |
| parent | cb19dfca2c9b315d29c5303203d8d0d1bbbd8511 (diff) | |
YJIT: Fastpath for Module#name (#11819)
Module#name shows up as a top C method callee in lobsters so probably
common enough. It's also easy to substitute thanks to rb_mod_name()
already having no GC yield points.
klass = BasicObject
50_000_000.times { klass.name }
Benchmark 1: /.rubies/post/bin/ruby --yjit mod_name.rb
Time (mean ± σ): 1.433 s ± 0.010 s [User: 1.410 s, System: 0.010 s]
Range (min … max): 1.421 s … 1.449 s 10 runs
Benchmark 2: /.rubies/mstr/bin/ruby --yjit mod_name.rb
Time (mean ± σ): 1.491 s ± 0.012 s [User: 1.468 s, System: 0.010 s]
Range (min … max): 1.470 s … 1.511 s 10 runs
Summary
/.rubies/post/bin/ruby --yjit mod_name.rb ran
1.04 ± 0.01 times faster than /.rubies/mstr/bin/ruby --yjit mod_name.rb
Diffstat (limited to 'variable.c')
| -rw-r--r-- | variable.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/variable.c b/variable.c index 4e55427ff5..bcdf2fb070 100644 --- a/variable.c +++ b/variable.c @@ -97,6 +97,8 @@ rb_namespace_p(VALUE obj) * to not be anonymous. <code>*permanent</code> is set to 1 * if +classpath+ has no anonymous components. There is no builtin * Ruby level APIs that can change a permanent +classpath+. + * + * YJIT needs this function to not allocate. */ static VALUE classname(VALUE klass, bool *permanent) @@ -127,6 +129,7 @@ rb_mod_name0(VALUE klass, bool *permanent) VALUE rb_mod_name(VALUE mod) { + // YJIT needs this function to not allocate. bool permanent; return classname(mod, &permanent); } |