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Update personal-notes.md

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Andy McFadden 2015-08-22 23:21:18 -07:00
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@ -184,10 +184,11 @@ I had forgotten how much fun this stuff is. Working in ARM assembly
language on Android offered similar challenges, but you're never entirely
sure exactly how your code will perform on the wide range of CPU
architectures (affecting instruction interleave, cache size and
replacement policy, etc.), you have to guess at cache misses and the
success rate of data prefetching, and it's difficult to measure results when
there's multiple threads running and interrupts firing. On the Apple II
you can count every cycle, and know exactly what will happen when.
replacement policy, branch prediction, etc.), you have to guess at cache
misses and the success rate of data prefetching, and it's difficult to
measure results when there's multiple threads running and interrupts firing.
On the Apple II you can count every cycle, and know exactly what will
happen when.
I don't expect that anyone will find the code useful, but that wasn't
really the point.