JVS stock run fast enough

After running a few days of JVS stock + Semaphore. Its fast enough. You don't need lagfix or ext4.
You can check whether you have lagfix or not by installing Voodoo control. If you don't see any lagfix word mean you dont have it by default.
With semaphore you are rooted and superuser installed. Darkcore required you to download and install superuser manually.