From: "elninorian (menuju sukses sukses)" Date: 2012-10-19T15:06:16+09:00 Subject: [ruby-core:48113] [ruby-trunk - Bug #3924] Performance bug (in require?) 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http://www.fatburningfoodsformen1.com/belly-fat-exercises-for-men.htm http://www.fatburningfoodsformen1.com/the-man-diet-free-download.htm ---------------------------------------- Bug #3924: Performance bug (in require?) https://bugs.ruby-lang.org/issues/3924#change-31072 Author: cabo (Carsten Bormann) Status: Assigned Priority: Normal Assignee: yugui (Yuki Sonoda) Category: core Target version: 2.0.0 ruby -v: - =begin Running irb < /dev/null in 1.9.2 causes 3016 calls to lstat64. For instance, there is a sequence of 28 repetitions each of lstat calls to all 6 non-empty path prefixes of /opt/local/lib/ruby1.9/1.9.1/irb.rb -- a total of 170 lstats apparently just to load this file; another set of lstats then occurs later for another 18 (times 6) times. Clearly, something is running amok in the calling sequence rb_require_safe -> realpath_rec -> lstat. Another example: Running a simple test with the baretest gem causes 17008 calls to lstat. According to perftools.rb, 80 % of the 1.2 seconds of CPU is used in Kernel#gem_original_require (and another 12 in GC, some of which may be caused by this). =end -- http://bugs.ruby-lang.org/