CSSCSS performance tanks with this particular CSS file
mohsen1 opened this issue · comments
I've started this task to analyze our 1.3MB CSS file at uk.nook.com:
csscss -v http://www2.nookassets.com/assets/application-095f49b5ae11ad8bf9ac81f54dc0c0aa.css
How long it's gonna take. It's already 1 hour and the process using 100% CPU and 500MB of RAM. Is it even working?
An hour is pretty nuts. Just glancing at the contents, perhaps it is getting bogged down with the data: elements. I know I had to do some special parsing for that.
Our CSS is a fraction of your size at 286KB but that only takes about two minutes. :/
∴ time csscss -v http://cache.harvestapp.com/assets/screen.css > /dev/null
real 1m40.338s
user 1m37.780s
sys 0m1.045s
That's still too long for me.
Have you tried breaking up the file into parts and seeing if one section takes substantially longer than another?
How long it's gonna take.
I dunno. Maybe another hour? 
Parsing still takes a long time, but that's not the culprit:
∴ time be ruby -Ilib test/just_parse.rb tmp/nook-terrible-performance.css
real 1m46.138s
user 1m43.455s
sys 0m2.108s
∴ time be ruby -Ilib test/just_parse.rb tmp/harvestapp-screen.css
real 0m18.422s
user 0m17.850s
sys 0m0.532s
We are using compass. It didn't work with --compass flag for our CSS for some reason.
Thanks for replying. I'll update you when it finished (if ever did)
OK, after 8 hours I decided to kill this thread.
Here is my output in case if it's useful
~/Projects/NookWeb/nook.com (master) ▶ csscss ~/Desktop/application.css\?body\=1
^C/Users/mazimi/.rvm/gems/ruby-1.9.3-p194@nookweb/gems/csscss-1.3.1/lib/csscss/redundancy_analyzer.rb:100:in `hash': Interrupt
from /Users/mazimi/.rvm/gems/ruby-1.9.3-p194@nookweb/gems/csscss-1.3.1/lib/csscss/redundancy_analyzer.rb:100:in `hash'
from /Users/mazimi/.rvm/gems/ruby-1.9.3-p194@nookweb/gems/csscss-1.3.1/lib/csscss/redundancy_analyzer.rb:100:in `block (2 levels) in redundancies'
from /Users/mazimi/.rvm/gems/ruby-1.9.3-p194@nookweb/gems/csscss-1.3.1/lib/csscss/redundancy_analyzer.rb:99:in `each'
from /Users/mazimi/.rvm/gems/ruby-1.9.3-p194@nookweb/gems/csscss-1.3.1/lib/csscss/redundancy_analyzer.rb:99:in `block in redundancies'
from /Users/mazimi/.rvm/gems/ruby-1.9.3-p194@nookweb/gems/csscss-1.3.1/lib/csscss/redundancy_analyzer.rb:97:in `each'
from /Users/mazimi/.rvm/gems/ruby-1.9.3-p194@nookweb/gems/csscss-1.3.1/lib/csscss/redundancy_analyzer.rb:97:in `each_with_index'
from /Users/mazimi/.rvm/gems/ruby-1.9.3-p194@nookweb/gems/csscss-1.3.1/lib/csscss/redundancy_analyzer.rb:97:in `redundancies'
from /Users/mazimi/.rvm/gems/ruby-1.9.3-p194@nookweb/gems/csscss-1.3.1/lib/csscss/cli.rb:40:in `execute'
from /Users/mazimi/.rvm/gems/ruby-1.9.3-p194@nookweb/gems/csscss-1.3.1/lib/csscss/cli.rb:17:in `run'
from /Users/mazimi/.rvm/gems/ruby-1.9.3-p194@nookweb/gems/csscss-1.3.1/lib/csscss/cli.rb:203:in `run'
from /Users/mazimi/.rvm/gems/ruby-1.9.3-p194@nookweb/gems/csscss-1.3.1/bin/csscss:4:in `<top (required)>'
from /Users/mazimi/.rvm/gems/ruby-1.9.3-p194@nookweb/bin/csscss:19:in `load'
from /Users/mazimi/.rvm/gems/ruby-1.9.3-p194@nookweb/bin/csscss:19:in `<main>'
from /Users/mazimi/.rvm/gems/ruby-1.9.3-p194@nookweb/bin/ruby_noexec_wrapper:14:in `eval'
from /Users/mazimi/.rvm/gems/ruby-1.9.3-p194@nookweb/bin/ruby_noexec_wrapper:14:in `<main>'
@mohsen1 Have you tried running csscss with jruby and plenty of ram? I recently found a big perf boost while tinkering with it. https://gist.github.com/zmoazeni/8091325