Re: speed tests

Hey, When running in debug mode the memory allocator does quite a bit more work. Especially when freeing memory it checks the freed memory pointer to make sure it hasn't been overrun and it also does a memset() on the memory before being freed. I think this probably slows Zend down quite a bit (but I'll check exactly how much soon). For people who have performance problems, the Zend optimizer would speed things up probably between 50%-100%. Andi At 23:15 07/04/99 -0400, Rasmus Lerdorf wrote: >Zeev and Andi, how much debug is in the current code, and what sort of >effect does the compiler bring? Just testing the looping speed with this >simple script in php3, php4 and perl5: > > $i=0; > while($i<500000) { > $b=sin($i++); > } > >The test script is identical for PHP and Perl here and I am on a Solaris >2.6 box. > >php3: > run 1: 29.07u 0.02s 0:29.95 97.1% > run 2: 29.98u 0.01s 0:30.34 98.8% > run 3: 29.74u 0.04s 0:30.29 98.3% > >php4: > run 1: 8.82u 0.03s 0:08.97 98.6% > run 2: 8.83u 0.01s 0:08.84 100.0% > run 3: 8.82u 0.02s 0:08.84 100.0% > >Perl5: > run 1: 2.59u 0.02s 0:02.61 100.0% > run 2: 2.53u 0.01s 0:02.54 100.0% > run 3: 2.55u 0.02s 0:02.57 100.0% > >A big loop like this is going right at Perl's strong point and it is good >to see that we are now in the same ballpark as opposed to an order of >magnitude slower with php3 or two orders slowed in php2. > >-Rasmus > > --- Andi Gutmans <andi@zend.com> ICQ: 1568297 PGP: finger andi@vipe.technion.ac.il