From: Yura Sokolov <funny.falcon@...>
Date: 2011-12-15T20:47:52+09:00
Subject: [ruby-core:41675] [ruby-trunk - Feature #5767] Cache expanded_load_path to reduce startup time


Issue #5767 has been updated by Yura Sokolov.


Nikolai Weibull wrote:
> Is it only me, or is treating $LOAD_PATH like an array hurting 
> possible optimizations? I mean, how sane is it to allow 
> $LOAD_PATH.map!{ ��� }?

I think, you right. $LOAD_PATH and $LOADED_FEATURES should be restricted.
But currently they not.
When I trying to improve $LOADED_FEATURES at #5427, I remove dangerous methods.

In this patch, it just invalidates cache when complex self modifying method is called,
and keeps cache valid in case of simple methods, like `push`, `pop`, `<<`
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Feature #5767: Cache expanded_load_path to reduce startup time
http://redmine.ruby-lang.org/issues/5767

Author: Yura Sokolov
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 


This patch add caching of expanded load path.
It reduces rails startup time by 33%
(patch against 1.9.3-p0 and simple performance test is here https://gist.github.com/1480404 )


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