From: Ryan Davis <ryand-ruby@...>
Date: 2009-05-21T10:03:24+09:00
Subject: Re: event_hook 1.0.0 Released


On May 20, 2009, at 05:37 , Roger Pack wrote:

>
>> Wraps rb_add_event_hook so you can write fast ruby event hook
>> processors w/o the speed penalty that comes with set_trace_func (sooo
>> sloooow!). Calls back into ruby so you don't have to write C.
>
> Wow thanks for doing this--anybody know why rb_add_event_hook is so  
> much
> faster then?
>
> A drop in replacement for set_trace_func might be sweet, too :)

most of the cost is block activation.