On Tue, 2005-08-23 at 17:36 +0200, Steven Van Ingelgem wrote: > Hi, > > I just redid the speedtest.tcl-script in PHP > (http://www.karels0ft.be/tmp/speed_script.html). > > Can anyone check why the SQLite3's are so slow compared to SQLite2's ? > >
Aha! Probably you are using an older test script that tries to run of synchronous using PRAGMA default_synchronous=OFF; The "default_synchronous" pragma was dropped form SQLite 3 because it was considered too dangerous. There was too much risk of data loss and database corruption after a power failure. Thus the synchronous behavior is never being disabled in your tests and you are reporting synchronous times in the "no-sync" column. Another thing to note is that SQLite3 has PRAGMA synchronous=FULL by default whereas version 2 had synchronous=ON by default. FULL is a little slower to commit, but it is also safer in the face of power failures. In spite of this handicap, SQLite version 3 still manages to be faster than version 2 in many tests. -- D. Richard Hipp <[EMAIL PROTECTED]>
