Haswell will double the GPU performance?

[robvas]

Yes, all based on Darwin. HOWEVER, because programmers had limited resources to work with the apps are designed to run way more efficiently.


to my experience same pages get choppy on the cMBP, the same amount. Gmail for instance.

Good example, my iMac is slow at resizing on some but it's not as slow as my 13" rMPB is

 

[Ploki]

Good example, my iMac is slow at resizing on some but it's not as slow as my 13" rMPB is

Well you can always check by choosing a non-HiDPI mode or even Native mode... I tested the same page, one at 2880*1800 + 200% zoom and one at 1440*900 HiDPI and though they looked exactly the same, the latter had at least 20fps less.
Very bad software implementation.