RE: unexpected performance degradation programs can be quite sensitive to how code is laid out because of cache line alignment, cache conflicts etc. So rando

RE: unexpected performance degradation programs can be quite sensitive to how code is laid out because of cache line alignment, cache conflicts etc. So random changes can have a surprising impact. There was a paper a couple of years ago explaining this and how to measure compiler optimizations more reliably. Sadly, I do not recall the title/author.