4 ms·

Now almost every code to be run is cache-bound for performance, not cycle-bound. So this gems, while may still work, may not be the best means to achieve optima

• uxcn 11y ago
  Cache is extremely important, but most of these operate strictly on values in registers. So, losing cycles due to cache misses, latency, contention, etc... isn't a bottleneck. A lot of these are crucial enough that they've been codified in transistors now, and generally can execute in a cycle without consuming extra registers. There are still some very valid bit tricks though.
  • dr_zoidberg 11y ago
    Well I read some and had the impression they were going for speed or low cycle count. Indeed, most surely still work (there doesn't seem to be anything that is processor-specific). Unfortunately my asm is rustier than I thought and I find it quite demanding to read and fully understand them.