I can see output stats with mod_pagespeed but it does not seam to be doing anything (all stats values stay at 0).
serf_fetch_request_count: 0
serf_fetch_bytes_count: 0
serf_fetch_time_duration_ms: 0
serf_fetch_cancel_count: 0
Anyone knows what can be going wrong?
Ok, I was able to found the blaming lines on my config:
So if you have some fancy DEFLATE options, disable them. On the other hand the below code works.