[Catalyst] Performance

[Jim Spath]

Perrin Harkins wrote:
> On 3/8/07, Jim Spath <jspath at pangeamedia.com> wrote:
>> On our development machine I ran myapp_server.pl through Devel::DProf,
>> hit it with a bunch of requests using ab, and got the following output:
> 
> Where's DBI?  Did you sort this by wall time (-r flag)?

We are using Catalyst::Plugin::Cache::Memcached minimize hits to the 
database.  That is why you don't see DBI in there, but do see 
Cache::Memcached.

Here is the output when I sort by wall time:

%Time ExclSec CumulS #Calls sec/call Csec/c  Name
  43.3   36.91 36.949    842   0.0438 0.0439 
Catalyst::Engine::HTTP::_socket_data
  8.64   7.346 89.845      1   7.3462 89.845  Catalyst::Engine::HTTP::run
  7.73   6.572  6.669  15156   0.0004 0.0004  Cache::Memcached::__ANON__
  2.71   2.308  2.308  21146   0.0001 0.0001  NEXT::ELSEWHERE::ancestors
  2.58   2.197  8.867   5052   0.0004 0.0018  Cache::Memcached::_load_multi
  2.39   2.036  2.036 282912   0.0000 0.0000 
I18N::LangTags::is_language_tag
  2.15   1.833  5.302  23695   0.0001 0.0002  NEXT::AUTOLOAD
  1.76   1.501  1.703 253442   0.0000 0.0000  URI::_generic::authority
  1.59   1.352 11.301  35365   0.0000 0.0003  Locale::Maketext::get_handle
  1.55   1.318  1.832  70728   0.0000 0.0000 
I18N::LangTags::super_languages
  1.52   1.293  5.466  36207   0.0000 0.0002 
I18N::LangTags::implicate_supers
  1.49   1.267 31.495   6736   0.0002 0.0047  Template::Document::__ANON__
  1.35   1.145  7.709  35365   0.0000 0.0002 
Locale::Maketext::_langtag_munging
  1.25   1.060  1.114 223130   0.0000 0.0000  URI::_generic::path
  1.16   0.989  1.507 284605   0.0000 0.0000  URI::_scheme

>> Lastly, Template seems to be taking up around 6%.  I suppose I could try
>> caching template output, but that will take some doing, as every page on
>> our site can vary per user.
> 
> You can try my Template::Plugin::Cache module if you like.  It caches
> the output of included templates so you can cache parts of a page
> instead of all of it.  I have a patch from Peter Karman that makes it
> play nicely with Catalyst's cache plugins.  There are also some things
> you can do to improve TT performance, which have been discussed before
> here and on the TT list.
> 
> - Perrin

Yeah, we could definitely divide up our templates a bit better so that 
we can utilize template caching on the static portions.

Thanks for the quick feedback Perrin!

Jim