ive never compiled android from source but i compile and render loads of other things.
faster is always better
had to quickly throw together a PC for as cheap as possible. i settled for buying a HP xw4400 workstation off craigslist for dirt cheap, then installed 4GB ddr2 ram i had laying around and i bought a GTX 550 Ti. i thought this lowly little 1.8 Core 2 Duo would be extremely slow but i havent felt the need to upgrade YET. all my apps and games work fine, even rendering and compiling is fine compared to my 4ghz phenom X4.
maybe thats because amd isnt as efficient, an they are actually BOTH slow and i just cant tell?? ill know when i finish my i7 build this summer.
to b_randon, laptops accumulate dust WAY faster than desktops.
heres what you do
take it apart (easier than it sounds, remember where the screws go. the website of the laptop DOES have a dissasembly guide. all laptops do.
take off the heatsink and re install it with arctic silver. clean the fins with compressed air while its off and make sure to clean all old residue off.
on the plastic case you will see lots of small bars, these are to protect things like your fingers from touching the fans while they are moving, problem is they DO affect air flow a lot more than you think.
you can use a pair of thin wire cutters and snip every OTHER plastic bar out, doubles airflow in and still stops objects from poking the fan.
that is a common mod for Core 2 Duo Toshiba satellite laptops but applies to LOTS of other laptops with similar cooling systems.
those two things will help and u will get less dust build up and it wont overheat anymore. the arctic silver paste helps the stock cooler work much more efficiently.
also, its good practice for building a desktop since youll have to do that stuff to it as well