[MacRuby-devel] New Build System, Faster Objective-C Dispatcher, Screencast

[Laurent Sansonetti]

On Jun 17, 2008, at 4:08 PM, Pierce T. Wetter III wrote:

>
> On Jun 17, 2008, at 3:34 PM, Laurent Sansonetti wrote:
>
>> Hi Pierce,
>>
>> On Jun 17, 2008, at 3:16 PM, Pierce T. Wetter III wrote:
>>> On Jun 16, 2008, at 6:55 PM, Laurent Sansonetti wrote:
>>>
>>>> -> http://ruby.macosforge.org/post/46/ :)
>>>
>>> Says:
>>>
>>> "These are very premature results, we expect to continue reducing  
>>> the
>>> time spent in the dispatcher, in the near future, and hopefully to
>>> make it twice faster."
>>>
>>> I've seen some dtrace related things go by. Does this by any chance
>>> mean that you're using Instruments against MacRuby?
>>
>> We don't have DTrace support in MacRuby yet, this is planned for 0.3.
>
> Ah, that's what #74 means.
>>
>>
>> But yes I used Instruments.app (especially the sample instrument) a
>> lot on MacRuby, to boost the objc dispatcher performance, and I will
>> continue for the rest of the code.
>
>  On the objc side or both sides? I spent some amount of time trying
> to figure out
> how to feed ruby stack traces into the Instruments.app sample
> instrument, but there's really no docs on how that stuff works. I
> originally thought I could just slap together some dtrace scripts, and
> ta-da! I'd have ruby sample runs. No such luck, as far as I could
> tell, you can do it for Java, but not Ruby.
>
>  On that note, would it be useful for me to make a Trac request for
> such a feature?

I only used it on the C side. MacRuby has very little (to not say  
inexistent) implementation written in Ruby.

Yes I agree that a Ruby sample instruments would be great. I think one  
could perhaps make a custom instrument that uses one of the various  
Ruby profiling libraries. But I wonder if it's possible to create  
custom instruments (except the DTrace-based ones).

Feel free to report this kind of feedback to the Instruments.app team,  
via http://bugreport.apple.com, it might perhaps turn into a feature  
somewhere in the future :)

Laurent