Re: [PHP4BETA] ZTS mode sooo much slower? (see attachment)

hi, changed the script to: <? echo "hello world\n"; ?> quantify tells me that the C++ lexer calls yy_get_previous_state 28 times whereby the c-version only calls it once. regards, tc ZTS version: Data from php (pid 24878) Note: Recursive descendants are marked with an '*'. Function name: zendFlexLexer::yy_get_previous_state() Filename: /dot/dc4/zend/zts-debug/libzend/zend-scanner.cc Called: 28 times Function time: 10039 cycles ( 0.23% of .root.) Function+descendants time: 10039 cycles ( 0.23% of .root.) Average function time: 358 cycles Minimum function time: 13 cycles Maximum function time: 1145 cycles Distribution to callers: 28 times ZendFlexLexer::lex_scan(_zval_struct*,_zend_compiler_globals*) Contributions from descendants: [None] non-ZTS version: Data from php (pid 24873) Note: Recursive descendants are marked with an '*'. Function name: yy_get_previous_state[zend-scanner.o/20] Filename: /dot/dc4/zend/cgi-debug/libzend/zend-scanner.c Called: 1 time Function time: 17 cycles ( 0.00% of .root.) Function+descendants time: 17 cycles ( 0.00% of .root.) Average function time: 17 cycles Minimum function time: 17 cycles Maximum function time: 17 cycles Distribution to callers: 1 time lex_scan Contributions from descendants: [None] On Tue, 7 Sep 1999, Rasmus Lerdorf wrote: > > the intresting thing seems to be that yy_get_previous_state gets called > > 156077 times in C++ mode but only 28 times in c-more... > > > > quantify tells me that system-calls have little/no impact in this > > test-case. > > > > i also want to mention that the test-script does *NOT* execute a lot of > > code but it defines a *LOT* of functions. > > How much code exactly? This still looks like it is related to the size of > the buffer on the input stream which is one of the things that is very > likely to be different in C++ mode. If you look in the generated flex > scanner code you will see that yy_get_previous_state() is called when the > end of the buffer is hit. So we hit the end of the input buffer 156077 > times in C++ mode and only 28 times in C mode? A little math based on the > size of the data you are feeding this test case might be interesting. > > -Rasmus > > > -- > PHP 4 Beta > > Thies C. Arntzen "One Big-Mac, Small Fries and a Coke!" Digital Collections Phone +49 40 235350 Fax +49 40 23535180 Hammerbrookstr. 93 20097 Hamburg / Germany