Where is the bottle neck?

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hey, hoping guys can help.

have new (a month old) base model 15" mbp. cousin has 2009 top-of-the-line 17" mbp.

both of work same company , both required access our company's software through web portal. mbp creeps along while accessing information, while cousin's mbp can query information instantly. when try resize browser window, pin wheel little bit, while cousin's system smoothly , "on fly."

bottle neck i'm experiencing due system ram or gpu/video ram?

asked guys @ genius bar... friendly, of no informational help.

 

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have @ activity monitor (applications / utilities /) , select all processes , sort cpu see culprit may be.
check "system memory" tab see "page ins:", "page outs:" , "swap used:" are.

image below uses sorting cpu example

further reading:

mac os x: reading system memory usage in activity monitor
making of activity monitor
what activity monitor (or how take mac's pulse)​

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