ruby--ruby/benchmark/bm_file_chmod.rb

# chmod file
require 'tempfile'
max = 200_000
tmp = Tempfile.new('chmod')
path = tmp.path
max.times do
  File.chmod(0777, path)
end
tmp.close!
file.c: apply2files releases GVL This means File.chmod, File.lchmod, File.chown, File.lchown, File.unlink, and File.utime operations on slow filesystems no longer hold up other threads. The platform-specific utime_failed changes is compile-tested using a new UTIME_EINVAL macro This hurts performance on fast filesystem, but these methods are unlikely to be performance bottlenecks and (IMHO) avoiding pathological slowdowns and stalls are more important. benchmark results: minimum results in each 3 measurements. Execution time (sec) name trunk built file_chmod 0.591 0.801 Speedup ratio: compare with the result of `trunk' (greater is better) name built file_chmod 0.737 * file.c (UTIME_EINVAL): new macro to ease compile-testing * file.c (struct apply_arg): new struct * file.c (no_gvl_apply2files): new function * file.c (apply2files): release GVL * file.c (chmod_internal): adjust for apply2files changes * file.c (lchmod_internal): ditto * file.c (chown_internal): ditto * file.c (lchown_internal): ditto * file.c (utime_failed): ditto * file.c (utime_internal): ditto * file.c (unlink_internal): ditto [ruby-core:83200] [Feature #13996] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60386 b2dd03c8-39d4-4d8f-98ff-823fe69b080e 2017-10-23 21:20:04 -04:00			`# chmod file`
			`require 'tempfile'`
			`max = 200_000`
			`tmp = Tempfile.new('chmod')`
			`path = tmp.path`
			`max.times do`
			`File.chmod(0777, path)`
			`end`
			`tmp.close!`