On Sun, 14 Feb 2016, Florian Klaempfl wrote:
Am 14.02.2016 um 10:45 schrieb Mattias Gaertner:
On Sun, 14 Feb 2016 10:35:22 +0100
Florian Klaempfl <flor...@freepascal.org> wrote:
[...]
Do you think people will bother? Nobody mentioned to the original poster
so far:
- that the used FPC is outdated
- that only -O2 is used instead of -O3 (or -O4 with 3.0.0)
- that even FPC 2.6.4 has a -Ooloopunroll option which is never enabled
by default and which is worth a try
I do not know if the points above really effect the example, but it
tells me enough not to bother either :)
Maybe documentation helps here.
You mean something like the page Size Matters? See the post of Martin
Schreiber how much such pages help.
Is there already a page "pimp my fpc"?
In this case even fpc -h would have helped :)
But actually, before bothering randomly with command line options, I
would just rewrite the inner loop. Something like
for n7 := 0 to 9 do
if n1 + n2 + n3 + n4 - n5 - n6 - n7 in [0..9] then
Inc(TicketsCount);
should be much better.
To back up Florian with numbers:
No in:
Found 4816030 tickets. Elapsed time, msec: 171
Using in:
Found 4816030 tickets. Elapsed time, msec: 23
Michael.
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