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Postings from September 2021
On Fri, Sep 10, 2021 at 12:21:06PM +0000, Nicholas Clark wrote: > If I read that right > > More branches. > > In absolute numbers, more mispredicts for conditional branches, fewer for > indirect branches. (Where *are* the indirect branches we're hitting so much?), In perl, the biggest indirects are usually the per-op op->op_ppaddr(aTHX) calls in runops() and any switch() statements. > In absolute numbers slightly more mispredicts over all, but proportionally > fewer. > > (Burn more CPU work with the intent to reduce cache misses) > > I'm not sure what can be tweaked to be better. > Or what actually matters, and what's fluff. > What is the benchmark? Your guess is as good as mine! -- "But Sidley Park is already a picture, and a most amiable picture too. The slopes are green and gentle. The trees are companionably grouped at intervals that show them to advantage. The rill is a serpentine ribbon unwound from the lake peaceably contained by meadows on which the right amount of sheep are tastefully arranged." -- Lady Croom, "Arcadia"Thread Previous | Thread Next