On 14/02/2016 09:11, Florian Klaempfl wrote:
For the record: with a few changes in the compiler I could reduce the
execution time of the example significantly . But I won't commit it
probably (maybe parts of it): extensive loop unrolling and loop
invariant search has normally little advantages in real world programs
and increases only compilation times.
Does that read
(extensive loop unrolling) and (loop invariant search)
or
extensive- (loop unrolling) and (loop invariant search)
That is, does fpc 3.0 do some none extensive loop invariant search or not?
How would the loop invariant affect this issue?
http://bugs.freepascal.org/view.php?id=10275
I remember in the 1980ies that was one of the thinks people got taught
to look out for and optimize themselves since compilers wouldnt. So back
then it mattered.
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