Methods to optimize the performance of simpleFoam solver for lid driven cavity case
 

Hello,
I'm new to the OpenFOAM software and currently working on simpleFoam solver for lid driven cavity case using PCG or GAMG solver.
As a beginner i started running cavity problem lower mesh size e.g, 150*150 and obtained results.
Can you guys suggest me some methods or any techniques that can help me in improving the performance of the simpleFoam solver.
The method can include modification of code or modification to cavity case or any such.

Plz reply asap.
Thank you in advanced :)