From: Yukihiro Matsumoto <matz@...>
Date: 2007-12-22T23:52:25+09:00
Subject: Re: Experimental PATCH to improve thread performance

Hi,

In message "Re: Experimental PATCH to improve thread performance"
    on Sat, 22 Dec 2007 23:42:03 +0900, Charles Oliver Nutter <charles.nutter@sun.com> writes:

|JRuby uses native threads, as you know. This increases the cost of 
|spinning up many threads, since green threads are much cheaper. So in 
|JRuby, I implemented an optional thread-pooling mode that uses Java's 
|concurrency APIs. In this mode, threads are reused; the number of native 
|threads used is only as high as the total number of threads running 
|concurrently, and those threads get reused until they age out of the pool:

Koichi told me about the idea about thread pooling in YARV few weeks
ago.  He's now concentrating on stability, but after we settled, I
think he would start working on performance again.

Anyway, I was pretty impressed by your quick works.  Thank you.

							matz.