On Tue, April 29, 2014 10:30, Petr Kristan wrote: . . > I use "inteligent" block increasing. I can optimize program, but why is > fpc heap manager to slow? > > Here is the sample stress program compilable with fpc, delphi and kylix: . . > And here are results: . . > Is possible to speedup heap manager?
Well, results of your test program on my machine (physical machine, MS Win 7 32-bit) show something different: Grow 0-9000000 31ms Grow 10000000-19000000 109ms Grow 20000000-29000000 172ms Grow 30000000-39000000 250ms Grow 40000000-49000000 327ms Grow 50000000-59000000 406ms Grow 60000000-69000000 483ms Grow 70000000-79000000 546ms Grow 80000000-89000000 625ms Grow 90000000-99000000 702ms Grow 100000000-109000000 764ms Sum 4431ms (compiled without cmem / without valgrind) Grow 0-9000000 31ms Grow 10000000-19000000 125ms Grow 20000000-29000000 203ms Grow 30000000-39000000 265ms Grow 40000000-49000000 375ms Grow 50000000-59000000 436ms Grow 60000000-69000000 531ms Grow 70000000-79000000 624ms Grow 80000000-89000000 733ms Grow 90000000-99000000 796ms Grow 100000000-109000000 873ms Sum 5008ms (compiled with -gv; as expected, adding CMem to the uses clause and compiling without -gv gives basically the same result). Tests performed with trunk compiler based on SVN from about 10 days ago. Results for 2.6.4 are more or less the same. I don't know the reason of your difference, but no time necessary at all (0 ms) for the valgrind variant looks very suspicious to me. Tomas _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-devel
