Linked by Tony Bourke on Thu 22nd Jan 2004 21:29 UTC
Benchmarks When running tests, installing operating systems, and compiling software for my Ultra 5, I came to the stunning realization that hey, this system is 64-bit, and all of the operating systems I installed on this Ultra 5 (can) run in 64-bit mode.
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gcc? Gag me with a spoon...
by Bascule on Fri 23rd Jan 2004 22:11 UTC

Just for fun I tried building building our grid analysis software with gcc 3.x instead of Sun's C compiler from the Forte Compiler Collection. The software makes extensive use of 64-bit integer math (and consequently executes much faster on a 900MHz UltraSPARC III+ than it does on a 2GHz Athlon running Linux) as all values in the grid files are either 64-bit integers (representing fixed point values) or 80-bit IEEE floats.

Unfortunately I don't have specific numbers offhand, and I'm sure gcc has matured quite a bit since I tried this (about a year and a half ago), but the binary bult with gcc performed at around 60% of the speed of the binary built with Forte 7.

Compared to the Sun compiler, gcc on sparcv9 is a joke for performance critical applications.