From: "lzap (Lukas Zapletal)" <lukas-x@...>
Date: 2013-02-04T04:36:16+09:00
Subject: [ruby-core:51829] [ruby-trunk - Bug #7778][Open] Irb loading generates 17x more open/stat system calls when a locale is set


Issue #7778 has been reported by lzap (Lukas Zapletal).

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Bug #7778: Irb loading generates 17x more open/stat system calls when a locale is set
https://bugs.ruby-lang.org/issues/7778

Author: lzap (Lukas Zapletal)
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: ruby 2.0.0dev (2013-01-07 trunk 38733) [x86_64-linux]


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.


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