gc.c: use monotonic counters for objspace_malloc_increase
atomic_sub_nounderflow is expensive and objspace_malloc_increase
was showing up near the top of some perf profiles. The new
implementation allows the compiler to inline and eliminate
some branches from objspace_malloc_increase.
Furthermore, we do not need atomics for oldmalloc_increase
This consistently improves bm_so_count_words benchmark by
around 10% on my hardware.
gc.c: use monotonic counters for objspace_malloc_increase
atomic_sub_nounderflow is expensive and objspace_malloc_increase
was showing up near the top of some
perfprofiles. The newimplementation allows the compiler to inline and eliminate
some branches from objspace_malloc_increase.
Furthermore, we do not need atomics for oldmalloc_increase
This consistently improves bm_so_count_words benchmark by
around 10% on my hardware.
name built
so_count_words 1.107
[ruby-core:87096] [Feature #14767]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63463 b2dd03c8-39d4-4d8f-98ff-823fe69b080e