Testing rig:
- Device: Nokia N900 @ 600 Mhz (default)
- Firmware: PR1.2 (Leaked)
- Condition: Just reflashed

- Device is rebooted before switching browser.
- Cache is deleted between every test.
- Flash is disabled.
- Every site is loaded twice and result is the average of these.
- This test will be updated once in a while.

Version Number:
Fennec: 2.0~a1~20100509010641 (Nightly)
Opera Mobile: 10alpha~fremantle0

Browsermark (http://ra.fi/hJ5z):
Please post your own results in this thread. So we can get more comprehensive results.

Higher is better.

MicroB: 14994
Opera Mobile: 15363 (alpha1-3) [s]11015[/s] (alpha1-0)
Fennec: No result, crashes every time.

Page loading:
In seconds. Lower is better.

http://facebook.com (no mobile)
MicroB: 4,99
Fennec: 3,66
Fennec Jit: 3,87
Opera Mobile: 2,33

http://maemo.org
MicroB: 7,24
Fennec: 4,65
Fennec Jit: 4,40
Opera Mobile: 3,66

http://talk.maemo.org
MicroB: 10,49
Fennec: 5,74
Fennec Jit: 5,68
Opera Mobile: 9,72

http://www.nokia.com
MicroB: 5,66
Fennec: 6,02
Fennec Jit: 4,30
Opera Mobile: 5,03

http://en.wikipedia.org/wiki/Main_Page
MicroB: 14,40
Fennec: 6,08
Fennec Jit: 5,89
Opera Mobile: 9,20

http://www.youtube.com (no mobile)
MicroB: 14,05
Fennec: 6,62
Fennec Jit: 8,21
Opera Mobile: 10,02

http://www.nytimes.com
MicroB: 27,23
Fennec: 20,13 (two crashes, then success)
Fennec Jit: 26,11
Opera Mobile: 21,20

Average:
In seconds. Lower is better.
Fennec: 7,56
Fennec Jit: 8,35
Opera Mobile: 8,74
MicroB: 12,01

...but with Opera Mobile you can load the next page of a site much faster than in any other browser. Good caching?

In seconds. Lower is better.


Startup:
In seconds. Lower is better.

MicroB: Instant
Opera Mobile: 2.934
Fennec: 5.978

Stability:

In my test Fennec crashed three times so that I had to boot whole device. Even killall in xterm didn't help.

In general use I have found that Fennec (nightly) is not stable enough compared to the other two. I have used "stable" version earlier but found that same problems were there. Large sites cause crashes quite often. Opera is newest browser, so it's hard to say anything about stability. Though still I haven't had any problems. MicroB has always been quite stable.

Usability and speed in general:

For me the UI of Opera is easily the best of these browsers. It leaves behind Fennec which I earlier loved. MicroB is far away from both of these browsers.

Though Fennec nailed these tests in paper I have to say that for me Opera Mobile is the fastest browser. I didn't test this but seems that Opera's caching works better than in other browser. Opera loads first page in a site little slower than Fennec but next page can open in a flash. For example, using Google-search made my eyes pop out. It's so fast!

Rendering:

There are minor and major problems with Opera Mobile (for example Gmail, Youtube). Fonts also differ from other browsers.

Conclusion:

It's obvious that in this test Fennec is the fastest browser for Nokia N900 in numbers. Bad performance of MicroB came as a surprise for me.

Newcomer Opera Mobile does it job very good for such an early version. Startup speed is fast and general browsing maybe fastest. UI is slick and beautiful.

This test made me switch from MicroB to Opera Mobile as my default browser.