Bug #7778: Irb loading generates 17x more open/stat system calls when a locale is set

• Status: Rejected
• Assignee: keiju (Keiju Ishitsuka)
• Target version: 2.6
• ruby -v: ruby 2.0.0dev (2013-01-07 trunk 38733) [x86_64-linux]

[lzap (Lukas Zapletal)]

Hello,

I did just found out that when I have a locale set (e.g. cs_CZ in my case), irb does some extra finding for rb/so files which are being required. That slows down loading time and if you have many rubygems, loading can be really slow.

$ LC_ALL=cs_CZ strace irb < /dev/null 2>&1 | grep ENOENT | wc -l
5195

$ LC_ALL=C strace irb < /dev/null 2>&1 | grep ENOENT | wc -l
293

$ time LC_ALL=cs_CZ irb < /dev/null
real 0m0.262s
user 0m0.165s
sys 0m0.023s

$ time LC_ALL=C irb < /dev/null
real 0m0.084s
user 0m0.066s
sys 0m0.014s

Tested on stable 1.9.3 and also on 2.0 RC1. All the same.

[ko1 (Koichi Sasada)]

• Category set to lib
• Assignee set to keiju (Keiju Ishitsuka)
• Target version set to 2.6

Is it only for irb?
Same as Ruby command?

[keiju (Keiju Ishitsuka)]

Irb search directories of RUBY_PATH for irb message locale files, if LC_ALL etc. is set.

Therefore, this is not a bug.

[keiju (Keiju Ishitsuka)]

• Status changed from Open to Rejected