Re: Why so slow in Windows?

Sebastian Krebs <krebs.seb@gmail.com> wrote: > 2014-02-10 15:32 GMT+01:00 Umberto Salsi <salsi@icosaedro.it>: > > > Hi, I'm testing a PHP program to be relased as open-source (PHPLint) which > > performs a detailed analisis of PHP source programs: > > > > No offense, but PHP can do this on it's own: "php -l filename.php" PHPLint does a bit more that php -l... Anyway, it's not this the point. > > > > * CLI only, no WEB, > > * no network connection involved, > > * no data base, > > * minimal disk activity required to load the source of the program > > and the sources of the files to be parsed (less than 500 KB); > > * the php.ini is very minimalistic, with no extension modules at all, same > > exact php.ini file on Linux and Windows. > > > > Observed: > > * CPU 100 % all the time. > > * No disk activity. > > * No net activity. > > * Only php.exe running on Windows (php-cli on Linux). > > > > Now, the performances trying to validate something moderately complex > > (itself): > > > > 1) Slackware Linux 12.1, Pentium 4, 32 bits, 1,6 GHz, > > PHP-CLI 5.3.6-dev (quite old, but still working :-): > > 26 s * 1.6 GHz = 42 Gcycles. > > > > 2) Windows Vista Business, Pentium E5300, 32 bits 2.6 GHz, > > PHP-CLI 5.3.10-nts: > > 132 s * 2.6 GHz = 343 Gcycles > > > > 3) Windows Vista Business, Pentium E5300, 32 bits 2.6 GHz, > > (same PC of point 2 above) > > PHP-CLI 5.5.9-nts (LAST RELEASE!): > > 111 s * 2.6 GHz = 289 Gcycles > > > > > > If performances can be measured as number of CPU cycles, PHP-CLI on Windows > > is from 6 to 7 times slower than on Linux. > I don't think you can measure it this way. What tells you, that nothing > else consume CPU-time? The fact that "task Manager" tells me that the "php.exe" process is taking all the CPU. Regards, ___ /_|_\ Umberto Salsi \/_\/ www.icosaedro.it