Hello Donald, I have managed to speed up some of my SQLite queries by about 300% by writing them from joins to sub queries. I am comparing SQLite against a custom SQL implementation we have here. It looks like it is our cursor implementation that is so much faster than SQLite the regular queries are roughly comparable. I'm going to step through our custom SQL cursor code and see if how it is managing that sort of speed.
I can't really post my table schema without first obscuring like I did the original test queries it as it contains sensitive information but I'll try taking a look at the schema output. Daniel -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Griggs, Donald Sent: Wednesday, December 03, 2008 3:51 PM To: General Discussion of SQLite Database Subject: Re: [sqlite] SQLite performance woe Hi again, Daniel, So I guess you're still having certain queries that take about 200x longer than with your custom code, right? There's nothing magical about sqlite, so it's not surprizing that code customized for an application can outperform a generalized sql engine, but a factor of 200 does seems pretty large. If it's neither especially proprietary nor private, I'd again urge you to post here your schema (and repost the slow queries). You can dump this easily using the command-line utility program, e.g.: sqlite3 myDatabase.db .output mySchema .schema .quit The schema should then be in the file "mySchema" If the database itself is not too private, you may want to compress it (with something like 7zip) and upload it somewhere on the web and provide a link to it. _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
