By: Eric Bron (eric.bron.delete@this.zvisuel.privatefortest.com), April 11, 2013 12:09 pm
Room: Moderated Discussions
> This might be a stupid question, but why can't you just replace instances
> of `prefetch(mem + idx)` with `if (idx
that will be one extra branch per prefetch, you definitely not want extra branches in your inner loops, even the loop exit branch miss has a sizeable impact, you don't want one more branch miss per loop
> of `prefetch(mem + idx)` with `if (idx
that will be one extra branch per prefetch, you definitely not want extra branches in your inner loops, even the loop exit branch miss has a sizeable impact, you don't want one more branch miss per loop