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 http://janus.allizom.org.

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.

Opera 21 features Off-Road mode version 2 with video compression

Opera 21.0.1419.0 web browser for Mac and Windows, based on Chromium 34.0.1825.4, has just been released. This Developer release provides many new features: Aura, a hardware-accelerated window manager, an option to show full URL in address bar, full keyboard support for web apps, and so on.

But the most exciting experimental features are hidden under opera://flags page, namely:

• Off-Road mode, version 2 - a.k.a. Opera Turbo 2, which uses next-generation servers and protocols such as WebP and SPDY for faster web browsing.
• Video compression in Off-Road mode - which optimizes video in version 2 of Off-Road mode, using Skyfire Rocket Optimizer aquired by Opera.
• Speed Dial extensions compositing - which enables hardware accelerated compositing for Speed Dial extensions.
• Enable lazy session loading - which loads only the active tab when restoring browser session. Remaining tabs will be loaded when activated.
• Extended lazy session loading - which changes mode of operation of lazy session loading so that all tabs are gradually loaded in the background.
• Synchronization - a.k.a. Opera Link.
• Tab hibernation - which tells idle background tabs to hibernate.
• DirectWrite - which enables smooth font rendering (finally!).
• Experimental QUIC protocol - which speeds up web browsing on supported servers.
• HTTPS over experimental QUIC protocol - which enables QUIC for HTTPS.
• SPDY/4 alpha 2 - which is more up-to-date than SPDY/3.
• HTTP/2 draft 04 - which is a next-generation protocol based on SPDY.
• Built-in Asynchronous DNS - which is an internal non-blocking DNS client.
• Enable Experimental JavaScript - a.k.a. ECMAScript Harmony features, such as proxies, weak maps, sets, maps, typeof semantics and block scoping.
• Enable experimental Web Platform features - such as CSS Shapes, Canvas Blend modes, Canvas Paths and CSS Clip Paths.

As to performance, Off-Road mode version 2 is faster than version 1. The average measured speed in Numion YourSpeed was 375 kbps vs 301 kbps on a slow network. The video compression works by serving files with content type video/skyfire or video/mp4 from Opera Mini servers.

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The best Android browser is... Opera!

I have tested the most popular web browsers on Android Jelly Bean: Stock Android Browser, Google Chrome 29, Opera 16, Opera Mobile Classic 12.1, Mozilla Firefox 24 and Dolphin Browser 10 with Jetpack. While Opera and Opera Classic have an Off-road or Turbo mode, which speeds up loading websites, it was disabled for this test. Here is the comparison table, two best results are green:

Browser	Browsermark	Octane Benchmark	HTML5 Test	CSS3 Test
Stock Browser	2132	1175	327 + 14	45
Chrome	2240	1951	429 + 11	60
Opera	2650	2089	443 + 11	62
Opera Classic	1740	571	406 + 12	52
Firefox	2071	2253	426 + 10	58
Dolphin	2008	1544	471 + 3	57

The best Android web browser, in terms of performance and compliance to web standards, is the new Opera! However, Dolphin has the best support for HTML5 and Chrome with Firefox are almost as fast as Opera.