[fpc-devel] Benchmark for FreePascal

[Marco van de Voort]

> > Op Sat, 10 Dec 2005, schreef darekM:
> > 
> > > Hi
> > > I've tested some of benchmark on 
> > > http://shootout.alioth.debian.org/
> > > 
> > > I've see that reverse-complement benchmark
> > > <http://shootout.alioth.debian.org/benchmark.php?test=revcomp&lang=all> for
> > > FPC is very slow. I discover, that problem is with readln, that function
> > > consume about 90% of time. Because I use it in my program, I implemented new
> > > version of reading files. My propositions is add tTextStream to unit Classes
> > > 
> > > using is very similar
> > > 
> > > while not eof do
> > > begin
> > >  readln(s);
> > > end;
> > 
> > The Shootout benchmarks should preferably be implemented without unit 
> > classes to achieve the best memory usage results. Your code is welcome 
> > though to add to unit classes, allthough I currently can't because it uses 
> > assembler code withotu Pascal alternative, i.e. it would make the classes 
> > unit unavailable on the other processors FPC supports.
> 
> Even then not. See my mail...
> 
> > 
> > Can you do the same to improve readln?
> 
> The problem is not the readln implementation, but the buffer size.

The said test has already been reviewed by Vincent aand me, however I still
must dig it up and send it to shootout. 

Iirc it is the speed of memory growth (the realloc) that is the problem,
not the textbuffer. Exponential memgrowth.