I have made a curious performance observation with gcc under 64 bit
cygwin on a corei7. I'm genuinely puzzled and couldn't find any
information about it. Perhaps this is only indirectly a gcc question
though, bear with me.
I have two trivial programs which assign a loop variable to a local
va
Hi David,
Sorry, I had included more information in an earlier draft which I
edited out for brevity.
> You cannot learn useful timing
> information from a single run of a short
> test like this - there are far too many
> other factors that come into play.
I didn't mention that I have run it d
In order to see what difference a different processor makes I also tried
the same code on a fairly old 32 bit "AMD Athlon(tm) XP 3000+" with the
current stable gcc (4.7.2). The difference is even more striking
(dereferencing is much faster). I see that the size of the code inside
the loop for t
