PDO, ADOdb, MDB2, Zend_Db, ADOdb Lite and DbSimple speed comparison

In this testing, I decided to find out what the performance of various modern classes of abstraction from the database. The test consists of two stages: the synthetic and the real-life test, which differ in the way in which the classes are formed. I also compared the performance without the APC opcode cache, and with it.

In testing participated:

• PDO (part of PHP 5);
• ADOdb 5;
• MDB2 (part of PEAR, heir and union of PEAR DB and Metabase) 2.5.0b1;
• Zend_Db 1.5.2;
• ADOdb Lite 1.4.2;
• DbSimple v2 R226 SVN.

So let's get started.