I enabled the compression option on WP Super Cache (off by default!) on my blog. After that, Website Optimization started identifying my pages as being compressed (before, it didn't).

All seemed well with the world, but then I double checked with Page Speed Firefox plugin, and and sniffed the traffic with Wireshark, and according to both these measures my page is not compressed.

Are my pages being compressed or not? Could it be some proxy my ISP is running, that does not support compression? (that would explain some of the horrible internet experience I'm getting).

Here are the HTTP headers I'm seeing with wireshark.


I'm getting a Content-Encoding:gzip header when I visit your site...

Cache-Control:max-age=300, must-revalidate
Content-Type:text/html; charset=UTF-8
Date:Sat, 23 Apr 2011 15:27:48 GMT
Keep-Alive:timeout=15, max=100

Also, you have a jQuery reference error in the wp-minify plugin :)

  • So the problem must be with my ISP (I tried from a different computer at my place, that one doesn't get gziped content as well). Crap. Well, I was switching ISP anyway. – ripper234 Apr 23 '11 at 17:14

No WP Super Cache didn't compress the image to that level. Say around, it compress image to only 30% of its size. Means it is negligible Instead why not try for TinyPNG is works decently.

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