[fpc-devel] FPC/Lazarus Rebuild performance
Marco van de Voort
marcov at stack.nl
Fri Sep 10 18:27:57 CEST 2010
In our previous episode, Adem said:
> I wanted to check to see if disk IO was really limiting FPC/Lazarus
> compile performance.
> The only quick way I could devise to check this was to use two different
> disks which are significantly different from one another in terms of
Both are atypical memory technology based devices which probably have low
seeking times, compared to harddisks.
With the total FPC/Lazarus sources being in the magnitude of 100MB, this
should be logical, doing this test that is based on raw read/write
bandwidth is not even necessary to determine that the bottleneck is not raw
This becasue even a harddisk budget model still does 80-100MB/s, and overall
building is not in the 1-2s magnitude.
The I/O bottleneck is thus more the searching and opening of files, as well,
on Windows, executing programs. (.exe's)
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