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by abainbridge 2321 days ago
It has been at least a 10% effect in the last two things I profiled, which were a simple software rasteriser and a distributed key value store. The other significant benchmarking gotchas I see are: 1) the CPU being in a sleep mode when the test starts and takes a while to get running at full speed, and 2) other stuff running on the machine causing interference. But these two are easy to work around compared to the alignment-sensitivity problem.