Optimized stylesheets

05 March 2004   1 comment   This site

https://www.peterbe.com/stylesheet.css

Mind That Age!

This blog post is 15 years old! Most likely, its content is outdated. Especially if it's technical.

I have been experimenting recently with HTML optimization but haven't applied it yet. But I have applied this now to my stylsheets. The size gain is 33%! (1577 bytes to 1027 bytes) However, the speed gain involves also the time to perform the optimization so the speed gain will obviously be less than 33%. But the optimization takes, on this slow computer, 0.004 seconds so in approximate terms the speed gain is also 33%. This is on a stylesheet file with some but short and few comments.

The optimization script removes almost all unnecessary whitespace (newline characters included) and all comments. The code for python friends looks like this:

import re
css_comments = re.compile(r'/\*.*?\*/', re.MULTILINE|re.DOTALL)
def _css_slimmer(css):
   css = css_comments.sub('', css)
   css = re.sub(r'\s\s+', '', css)
   css = re.sub(r'\s+{','{', css)
   css = re.sub(r'\s}','}', css)
   css = re.sub(r'}','}\n', css)
   return css

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