[fpc-devel] Benchmark for FreePascal

Jonas Maebe jonas.maebe at elis.ugent.be
Wed Dec 14 18:36:37 CET 2005

On 14 dec 2005, at 18:33, Marc Weustink wrote:

>> In my test (Mac OS X/PPC, rtl and program compiled with register   
>> variables, text buffer of 64kb) readln's overheid is negligible.  
>> The  large cost comes from writeln. The reason the C version is so  
>> much  faster is because its output is buffered as well. We  
>> automatically  flush the output after each writeln (i.e. after  
>> each writeln of 60  characters), while in C this only happens at  
>> the very end of the  program for 128kb of characters at a time.
> Another speed improvement will be disabling IO checks for write, {$I-}

That code only takes 0.5% of the time, not really relevant.


PS: my "negligible" above was an overstatement, the readln code takes  
up 8.4% of the time. Still a far cry from 90% though.

More information about the fpc-devel mailing list