[fpc-pascal] Optimizer in 2.0

Florian Klaempfl florian at freepascal.org
Tue May 31 12:52:47 CEST 2005

Adrian Veith wrote:

> Hi,
> I am newbie with fpc (but not with pascal, which I use more than 20y now).
> We have lot of existing delphi code, which some of it, I want to port to
> new platforms - and fpc looks like the right tool for it. But I am
> concerned about the speed. I did some basic benchmarks and it seems,
> that the optimizers has no effect in the 2.0 compiler (or the code even
> get's slower).

This shouldn't be the case in general, can you give examples or post the
benchmark? And don't try with useless code, we don't care about optimziations
which test only useless code which never happens in real programs.

> With the 1.9.8 compiler, the same code executes 4 times quicker - what
> happend (or what do I wrong) ?
> For optimizing I use the -OG3rp3 switch  - is it still valid ?
> Thanks,
> Adrian.
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