I just replaced the /system/lib/libsqlite.so from the source thread you posted, set permission to be same as the other binaries, rebooted. Ran RL Benchmark and got the same, around 93 seconds overall score (using 245-600 ondemand CPU, IHO CM7.1. Are you getting the same performance?
UPDATE: If I overlock to 806 Mhz, was able to drop the overall time to 71 seconds, went back to original libsqlite.so and at the same clock speed, takes about 81 seconds. The performance gain is negligable given the corruption risk (and according to Blarf in the IHO thread, properly written apps won't see much of a benefit anyway).