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Nat!

Senior Mull.

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Apple G5 Dual 2.5GHz vs. Dual 2.0GHz (first revision)

Or ZNeK's machine vs. mine. Running them Skidmarks, the Dual 2.5 Ghz is 25% faster, big surpise

Test Dual 2GHz Dual 2.5 GHz
ParseVid (INT) 104.5% 160.3%
MPEG (INT) 148.1% 183.6%
PixBlend (INT) 148.9% 186.1%
Ellipticrypt (INT) 150.6% 188.1%
Rijndael (INT) 205.8% 257.1%
Quicksort (INT) 212.1% 265.3%
MDCT (FP) 361.0% 451.3%
IntToFloat (FP) 238.4% 297.5%
Q3 (FP) 180.0% 225.1%
FFT (FP) 383.4% 481.7%
VolInt (FP) 283.1% 355.4%
Quant (VMX) 213.3% 268.0%
Galaxy (VMX) 166.2% 207.2%
IDCT (VMX) 204.0% 254.8%
BigMult (VMX) 229.6% 287.0%

An interesting and mysterious fact is that measurements are very stable for FP and VMX tests, but vary a lot for INT tests. This is possibly the same weird problem I had measuring some other code (see Head Scratching). I have still no clue, what the reason could be, but I am sure that knowing the reason would be enlightening.