Forum Moderators: phranque
not sure if the information is still current but this WebmasterWorld thread may have some ideas for you to try:
[webmasterworld.com...]
You would be surprised how well it can help identify performance issues. For instance, changing some code to use one UUID function to another custom one increased our requests per second capabilities from 180 to 320. We were lucky enough to start using this as we coded to find issues like this.