[GD-Windows] VC.NET 'Optimization'

[yogiwp <yo...@gm...>]

Hi all,

I've just waste alot of time debugging, and surprised that the root of
problem come from VC.NET 2003 reordering stuff too aggresively.

This piece of code is supposed to measure time spent in fibonacci():
----------------------------------------------------
    timer.Restart();
    int fib = fibonacci( 42 );
    float msTime = timer.GetElapsed();
    printf( "time=%f, result=%d\n", msTime, fib );
----------------------------------------------------
But the optimizer decided to move the fibonacci() call just before
printf() and after GetElapsed(), causing the timer to measure nothing.

Of course the bug does not manifest in debug builds, which made
my head hurt even more :(

The fix is simply changing the last line to:
    printf( "time=%f, result=%d\n", timer.GetElapsed(), fib );

Anyone got bitten by this before? This is a bug, right?


Yogi Wahyu Prasidha