ruby--ruby/benchmark/bm_dir_empty_p.rb

require 'tmpdir'
max = 100_000
Dir.mktmpdir('bm_dir_empty_p') do |dir|
  max.times { Dir.empty?(dir) }
end
Dir.empty? releases GVL This converts all slow syscalls in the Dir.empty? implementation to release GVL. We avoid unnecessarily GVL release and reacquire for each slow call (opendir, readdir, closedir) and instead only release and acquire the GVL once in the common case. Benchmark results show a small degradation in single-threaded performance: Execution time (sec) name trunk built dir_empty_p 0.689 0.758 Speedup ratio: compare with the result of `trunk' (greater is better) name built dir_empty_p 0.909 * dir.c (rb_gc_for_fd_with_gvl): new function (nogvl_dir_empty_p): ditto (dir_s_empty_p): use new functions to release GVL * benchmark/bm_dir_empty_p.rb: new benchmark [ruby-core:83071] [Feature #13958] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60111 b2dd03c8-39d4-4d8f-98ff-823fe69b080e 2017-10-03 20:04:51 -04:00			`require 'tmpdir'`
			`max = 100_000`
			`Dir.mktmpdir('bm_dir_empty_p') do \|dir\|`
			`max.times { Dir.empty?(dir) }`
			`end`