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Version 5.2 Pi computation speed is simply amazing.
Version 5.2 computes Pi to a million places more than 11 times faster than version 4.2 does on my same machine. (Computed in 37.32 seconds on a G4 933 Mhz OS X machine, actual time to show full result on screen.) This speed is simply amazing, considering it is almost as fast as the fastest AGM-Borwein programs to compute pi. However, those slightly faster AGM-Borwein programs require the number of digits computed to be a power of 2, where in Mathematica one can stipulate a completely arbitray number of digits for output. This performance in version 5.2 is nothing short of amazing. Great work there. :)