It’s the age-old question: are you better to handcraft detailed instructions, or do you just let a compiler handle it for you? Assembler vs C? Write your own memory manager or let the garbage collector do that for you?
Turns out it’s not too bad. Ciaran McCann did some tests and found out only FireFox had some serious troubles running the GWT code. The test isn’t complete yet, I’m very interested in the stats for Windows.