From: Urabe Shyouhei <shyouhei@...>
Date: 2014-01-06T23:10:41+09:00
Subject: [ruby-core:59594] Re: [ruby-trunk - Feature #9362][Assigned] Minimize cache misshit to gain optimal speed

On 01/06/2014 06:11 PM, Urabe Shyouhei wrote:
> On 01/06/2014 04:52 PM, SASADA Koichi wrote:
>> Could you try same measurement
>> https://github.com/ruby/ruby/pull/495#issuecomment-31580604
>> with only addding dummy padding to RVALUE (and not extend embed area) if
>> it is easy to try?
> 
> Wait a moment.  It is not difficult but takes some time.

Here you are.
http://www.atdot.net/fp/view/hfgzym

2.1.1 and 5-words should be the same, so be sure there are ~1 second error margin.

I cannot explain why 9 words case is this fast, but it is clear to me
that prime-number-sized object does have negative impact on performance.