If we look at the last callgraph again, we see that we are spending close to 40% of our time
parsing and compiling. We can eliminate that by using an opcode cache like APC.
*805* requests/second. Callgraph?
If we look carefully we see that over 5000 requests we are opening 20000 files. Main script plus
4 includes on each request. This is because *include_once* and *require_once* don't play nice with
opcode caches right now. Changing to *require* brings us to *875* requests/second.
APC also has a no-stat mode. If you give it absolute paths, it can skip the stat() call.
'mysql',
'db_user' => 'nobody41',
'db_pwd' => 'foobar',
'db_host' => 'localhost',
'db_db' => 'users',
'db_opts' => array(PDO::ERRMODE_EXCEPTION => true,
PDO::ATTR_PERSISTENT => true,
PDO::MYSQL_ATTR_DIRECT_QUERY=>1),
'path' => getcwd()
);
?>]]>
| $name | {$row['age']} | {$row['entry']} |
EOB;
}
boo();
foot();
?>]]>
This takes us to *885* requests/second. We are down to 2 machines!