At $199, the iPhone 3GS is twice as expensive as the basic 3G model and from AnandTech’s testing it seems be about 50% faster.  Part of that reason is because the ARM chip that they are using runs at 600MHz as opposed to 412MHz, but the speed bump is not the only reason. The ARM Cortex A8 sports twice the L1 cache and also has a 256KB L2 cache, something that is completely missing from the ARM11 chip that the 3G uses.  It also manages to beat out the Pre.

“The iPhone 3GS uses an ARM Cortex A8 processor running at 600MHz, much like the Palm Pre. Many weren’t confident that the 3GS used the new ARM A8 core instead of a higher clocked ARM11, so after waiting in line to grab a 3GS this morning I decided to run a few tests.”

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