Eric Blake wrote: > According to Paolo Bonzini on 8/27/2008 5:48 AM: >> Under MacOS, getc is not a macro, only getc_unlocked is. This patch >> does two things: 1) it makes getdelim use getc_unlocked if it can wrap >> the calls with flockfile/funlockfile; 2) it makes getdelim omit the >> locking altogether if unlocked-io is in effect. It speeds up sed by >> almost 2x in very simple scripts with very little regular expression >> matching (such as '/^something/!d'). > >> Ok? > > Sounds interesting. How does this compare with the current approach used > by getndelim2, which uses freadptr to avoid getc?
I don't know. :-) It could be even faster to use freadptr and memchr indeed. But getline is now completely off the profile for sed. Paolo
