[jifty-devel] A slow pony and suboptimal loops

Jesse Vincent jesse at bestpractical.com
Mon Dec 18 18:06:35 EST 2006

On Dec 18, 2006, at 12:52 AM, Agent Zhang wrote:

> On 12/18/06, Jesse Vincent <jesse at bestpractical.com> wrote:
>> Is it that available_values isn't being cached? If so, would  
>> precaching
>> it help?
> Okay, now I'd request caching the available_values sub (via an
> option?) since Benchmark::Timer has produced the following report:

So, I think the trick is that we may want something deeper: caching  
of Jifty::DBI::Collections. This would get us the performance boost  
here and elsewhere.

> 1 trial of total (20.610s total)
> 75 trials of  available_values  (13.864s total), 184.856ms/trial
> 75 trials of  loop  (2.126ms total), 28us/trial
> Calls of avalable_values are very expensive operations which take
> 67.3% of the total time. So it has nothing to do with the loop itself.
> I think caching is a very promising way to speed up things
> dramatically in this situation.
> Cheers,
> Agent
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