[checoivan]

you need the fastest dev box to compile as fast as possible and run unit tests and bvt tests quickly. It's a true pain having to wait 20 or 30 minutes for something to compile and test just to keep working.

Performance tests are done separately on machines on a lab and there's lot of them, with components on and off,different configurations etc. In some cases you can simulate slowness like latency or less bandwidth ,as in a client with a 14.4k modem connection, with things like wansim. That allows to automate as much as possible.