Mar 3, 2016

Ziproxy vs Janus vs PageSpeed Module - comparison of compression proxies

Only 27% of the global population has access to a fast internet (over 10 Mbps) and hundreds of millions of people around the world have a limited Internet connection. This is where a data compression proxy (a.k.a. web accelerator) comes to the rescue. It optimizes loading of web pages by minimizing HTML/CSS/JS, enabling gzip compression, re-encoding images, etc.

Some time ago I was comparing proxies in the cloud: Mozilla Janus, Opera Turbo and Google Compression Proxy. Now I am testing open source HTTP forwarding proxies: Ziproxy, Mozilla Janus and Google PageSpeed Module (mod_pagespeed) for Apache with mod_proxy, all installed on my premise. This time the primary factor is not loading time, but total size of various web pages.

Ziproxy Janus PageSpeed Direct
ZDNet 1026 KB 1117 KB 802 KB 1225 KB
TheNextWeb 3768 KB 3638 KB 3672 KB 4156 KB
New Yorker 4528 KB 4872 KB 4782 KB 5357 KB
AntyWeb 1258 KB 2750 KB 1928 KB 3493 KB
iStockPhoto 2905 KB 3699 KB 3444 KB 3756 KB
Total 13485 KB
(25% saved)
16076 KB
(11% saved)
14628 KB
(19% saved)
17987 KB
The best compressing HTTP proxy is Ziproxy with 25% of data savings. The second place goes to Google PageSpeed with 19%. Mozilla Janus was the worst with only 11% saved.

All the proxies were tested with equal image quality settings (60%).

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