Sep 11, 2014

Chrome Data Compression Proxy vs Mozilla Janus vs Opera Turbo

Most of web browser vendors provide a way to speed up browsing by using compression proxy. Opera has long been known for its Turbo/Off-road mode, Google Chrome has the Data Compression Proxy and Mozilla has recently introduced the Janus Proxy, which you can access system-wide using a PAC file at

I have tested onload event times of various web pages using all three compression proxies and a direct 5 Mb/s connection over WiFi on my PC. Total times as well as Numion YourSpeed results are shown below:

Chrome DCP Mozilla Janus Opera Turbo Direct
ZDNet 11.5 s 24.5 s 11.4 s 11.1 s
CNN 14.3 s 20.0 s 12.2 s 10.7 s
BBC 7.3 s 27.3 s 11.7 s 6.6 s
NYtimes 6.5 s 10.7 s 6.1 s 5.6 s
eBay 8.7 s 14.5 s 7.8 s 8.1 s
Amazon 5.3 s 10.6 s 3 s 5 s
Pinterest 7.4 s 12 s 9.2 s 7.3 s
Wikipedia 3.8 s 6.3 s 3 s 3 s
Total 64.8 s 125.9 s 64.4 s 57.4 s
Numion YourSpeed 218 kb/s 119 kb/s 216 kb/s 308 kb/s

Surprisingly, the fastest is a direct Internet connection, but this would depend on your local bandwidth. Opera Turbo and Chrome Compression Proxy go head to head, both using WebP image format. The slowest is Janus, using MozJPEG instead.