I have posted this on another forum.
Browsers: Stock, Dolphin, xScope
Device: Droid
I know this doesn't sounds fair since I am the developer of xScope browser. But I performed several times the Sunspider test, xScope is alway on top, by a large margin.
The test sites is here: (link because this forum doesn't allow big picture)
Droid Forum - Verizon Droid & the Motorola Droid Forum
SunSpider JavaScript Benchmark
Please if possible report your test. Thanks.