3 ms·

Just give them profilers.

• aidenn0 16y ago
  Not good enough. We have automated performance testing on older machines here. There was a case where something that ran blazingly fast on the developer's machine completely bombed the automated performance test on an older machine. In fact it ran several orders of magnitude slower. It turns out that the older machine had a smaller and less associative cache. On the developer's machine there were no memory accesses in the innermost loop, but on the older machine it was hitting memory several times in the innermost loop. This is a case where the rated MIPS difference was less than a factor of 4, but the performance difference was orders of magnitude.