Hanging on processing

[mkstvnsn]

Excellent project. I'm having an issue with the optimizer hanging when more data is inputted. Trying to determine the maximum but it appears after either a certain character count or if the program is hitting "something" it fails to deliver a result. Has anyone else experienced this?

It works fine if I drop in chunks of ~250-300 lines of CSS, but after that it does not work for me. Of course the power in this would be making large CSS files smaller... Any advice?

Thank you!

[tadatuta]

@mkstvnsn can you please attach the file on which CSSO hangs?
we use it with files much larger then 300 lines and it works fine.

[josx]

@tadatuta
I am using it in a 20000 lines css, and it seems to not finnish
you can download it from here

[grrowl]

I'm seeing this issue too on a 2600 line fine (one of those, "each selector and rules on one line only" deals).

Since the line it errors on jumps around based on various things (although seemingly always before an #id selector), I'll try breaking it up into smaller files.

[grrowl]

The errors were much earlier than the line stated, running through CSSLint shed some light on the issue.

[lahmatiy]

@josx your file is really huge – it's about 3.7Mb and any tool has trouble with it. Moreover I found 1 (!!) rule that takes 2.1Mb (56% of file) and contains 20873 selectors to set single property background-color. It's very very strange. May be something wrong with css generation?
csso is not hanging in this case, but it takes too many time to done. Probably it's never to be finished.
Anyway we'll use this file example as stress test for future implementations if there are no objections

[josx]

@lahmatiy thanks a lot!
I forgot to write down here, but there was a problem in a less code when generating this file.
Anyways As you said might be usefull to know why it is happening.
Go head and use it!

[lahmatiy]

@josx Good news: reworked version of compressor (compressor branch, release is coming) is not hanging on your example anymore. It takes about 30sec on my Mac, but outputs the result :)

[josx]

good catch! thanks a lot!
So We can close this issue now.

[lahmatiy]

I'll do when new release is out.

[lahmatiy]

Also I see some places for optimisations that could help drop time down. Stay tuned ;)

[lahmatiy]

csso 1.5 is out, problem fixed.
Compression takes about 12 seconds now.

[josx]

@lahmatiy
Great!
Thanks for your time and effor!

[lahmatiy]

csso 1.6 is out
Compression takes ~5.5 seconds now :)