On Mon, Sep 12, 2005 at 06:25:18PM +0200, David Abrahams wrote:
Last week, we were considering using the parameter library in some client software that demands high performance (they are doing massively parallel statistical analysis), so I sat with Matthias Troyer, an expert in high-performance C++, and developed the test that's now checked in at libs/parameter/test/efficiency.cpp. The test
Interesting. Thanks for sharing it.
We'd be very interested in seeing results produced with other compilers and/or platforms at the highest optimization levels.
Here's a test from a machine I have handy: Testers: Chris Frey Date: 2005-09-17 Compiler: Linux kernel 2.4.27 gcc version 3.3.6 (Gentoo 3.3.6, ssp-3.3.6-1.0, pie-8.7.8) Command lines: g++ -c -o efficiency.o -ftemplate-depth-100 -funroll-loops \ -O3 -finline-functions -Wno-inline -DNDEBUG efficiency.cpp g++ -o efficiency.exe efficiency.o -Wl,--strip-all Machine: IBM Thinkpad 770Z, running on AC power Intel Pentium II 366Mhz Timings: Run #1 results discarded per standard practice Run #2 plain time: 6.42 named parameter time: 7.34 Run #3 plain time: 6.42 named parameter time: 7.34 - Chris