Re: Performance degradation

On Sun, 23 Feb 2003, Shane Caraveo wrote: > Rasmus Lerdorf wrote: > > So, I am just starting out down the path to figure out why PHP 4.3 has > > gotten so much slower than 4.2. "strace -c" provides the first clue. A > > straight "./configure --enable-inline-optimization && make" command-line > > build for 4.2, 4.3 and 5.0 run on a simple hello world script reveals that > > we have gone from 219 system calls in 4.2 to 233 in 4.3 to 236 in 5.0. > > This is a bad trend and we really need to make an effort to reverse this. > > > > 4.2 Hello World from command-line: > > > > CGI, right? Part of this may be from the path_info handling I've added. > There is a stat call in there to determine if the path provided by the > webserver includes path_info also, if it does have path_info (stat > failed), it walks up the path doing a stat to determine the script > filename and path_info correctly. the ini setting cgi.fix_pathinfo > turns this on or off. It also uses a handfull putenv and getenv calls > in straightening things out. I'm sure this adds some of that, but I > don't think it would add as much an increase as you are seeing, unless > you're using some long path_info paths. The extra realpath() and fstat() calls are not cgi specific, so if what you added only affects cgi, then that isn't the big problem. -Rasmus