Tag Archives: optimization

5.0 journal: various issues, replication prefetching, our branch

First of all, I have to apologize about some of my previous remark on 5.0 performance. I passed ‘-g’ CFLAGS to my build, and that replaced default ‘-O2′. Compiling MySQL without -O2 or -O3 makes it slower. Apparently, much slower. … Continue reading

Posted in mysql, wikipedia, wikitech | Tagged , , , , , | 8 Comments

Optimization operator

I have introduced this to quite a few colleagues in a form of question “what is the optimization operator in C++/PHP/…?” The answers varied a lot, people would come up with branch prediction stuff (likely(),etc), and many other ideas, though … Continue reading

Posted in wikitech | Tagged , | 3 Comments