At 01:10 23/01/2009, you wrote:
Hello FPC-Pascal,
I'm using FPC 2.2.2 running over WinXP SP2. Are there any technical
reasons that expains that a program runs faster using all checks ( I/O,
Range, Overflow, Stack and Verify calls ) with optimization level 1
and using heaptrace, than the same one compiled without any check,
optimization level 2 or 3 and not using heaptrace ?
Perhaps your level 1 code fits in level 1-2 cache, and your level 2-3
don't, causing more cache misses. Try to compile with -Os instead
level 1-2-3 and see if it's faster.
I had expected around a 5% faster with the non-checks config, but I
get a 2% slower program :-?
Everything has been tested using Lazarus 1 month SVN, using a 1 minute
runtime check.
--
Best regards,
JoshyFun
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