3 ms·

I'm completely making stuff up here, but I wonder if this is the effect of some last minute (or even post-release, via ucode update) bug fix, where page aligned

I'm completely making stuff up here, but I wonder if this is the effect of some last minute (or even post-release, via ucode update) bug fix, where page aligned fast rep movs had issues or were subject to some attack and got disabled.

renonce 3y ago
Then fast rep movs should have been disabled in cpuid altogether
- gpderetta 3y ago
  They might have benchmarked a set of loads they care about and seen that on average leaving that set was better. But they are all conjectures.