From: McBreen Betty (mcbreen@sgs1.hirg.bnl.gov)
Date: Tue May 13 2003 - 04:03:15 EDT
Hello. Since I heard that Intel compiler produces a faster program (20%), I tested it by downloading the free Intel compiler (from Intel). I compiled root version 3.03.09 on Intel Xeon 1700MHz with RH7.3 (pii11). Then, I run the standard root benchmarks, which is not complete by any means but good enough for casual check. The below shows the results. intel icc compiler tutorials/benchmarks.C--->412 rootmarks test/bench.cxx ----> 460 rootmarks gcc 2.96 compiler tutorials/benchmarks.C--->344 rootmarks test/bench.cxx ----> 358 rootmarks intel icc is 20% - 28% faster in these benchmarks. As you can see, it is true that Intel icc compiler produces the faster program on Intel CPU machine although it is not that much. (I do not know what would happen in AMD or other x86 compartible CPU.) Maybe, we can ask to install it rcas during the next upgrade (this summer). Hiro
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