In message "Re: [ ruby-Patches-2769 ] Patch for Array#insert"
    on Thu, 3 Nov 2005 13:39:53 +0900, noreply / rubyforge.org writes:

|Hi all,
|
|I've attached a patch for Array#insert (array.c).  This gets rid of the manual argc counting, and improves performance when dealing with negative indexes.  I handled a -1 index specially, since all it does is append.

Strange.  I had no significant performance improvement on my machine
(1.9.0 i686-linux), rather it slightly slows down Array#insert.

							matz.