Hi Felipe, I don't know. :-/ That's a pretty big discrepancy... (Did you do a complete recompile before and after the patch?) With your test, timed with microtime() on my old Win2k system (release/non-debug), I get 1.56s before and 1.54s after -- about what I'd expect after doing my own random testing previously. It's not expected to be a big optimization, just eliminate the overhead of the old INIT_STRING only allocating an empty string initially. (Of course, the more ADD_STRING/ADD_VAR ops for a string, the less relative difference there is.) And saving an opcode makes creating/destroying op arrays just a bit faster without a cache.
BTW, after recompiling the latest 5.3 code, after some changes in the last days (mine had been a few days old), I observed a couple different things after my changes: the binary size was 8K smaller (no change a few days ago), and there was a surprising improvement on a lot of the bench.php tests (I think "ackermann" is the only one that uses interpolated strings). Just compiler randomness I guess, but going from 27.9s to 27.1s is more than the fluctuation I've seen before. :-) - Matt ----- Original Message ----- From: "Felipe Pena" Sent: Tuesday, May 06, 2008 > Hi Matt, > about optimization..., do you have any test for comparison? Why, in my > crazy test (http://rafb.net/p/ZzQQQP97.html), the actual code is more > faster than your patch. > > real 0m1.156s > vs > real 0m1.368s > > (using time command) > > > I'm just curious, i'm not against your patch. > > Thanks. > -- > Regards, > Felipe Pena. -- PHP Internals - PHP Runtime Development Mailing List To unsubscribe, visit: http://www.php.net/unsub.php
