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[mkgmap-dev] Performance with zipped hgt files

From Gerd Petermann gpetermann_muenchen at hotmail.com on Tue Jan 9 12:28:38 GMT 2018

Hi all,

not sure what happened the last time when I measured performance, probably another program installed
updates or the NTFS files were still compressed in background :-(
Maybe it was the change to build 152.
Anyway, I cannot reproduce the poor performance with zipped hgt files, in fact
I see times which are a slightly faster now compared to uncompressed files.
So, as long as java heap is not a bottleneck there is probably no reason to avoid zipped files.
I tried 4035, 4038 and 4040 and found nearly the same run times with zipped files.

Please let me know if you see different results for your work loads.


Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Andrzej Popowski <popej at poczta.onet.pl>
Gesendet: Dienstag, 9. Januar 2018 00:04:07
An: mkgmap-dev at lists.mkgmap.org.uk
Betreff: Re: [mkgmap-dev] Performance with zipped hgt files

Hi Gerd,

I can confirm, that mkgmap has no memory problems with DEM for big
tiles. I can compile map without limiting tile sizes.

Best regards,
mkgmap-dev mailing list
mkgmap-dev at lists.mkgmap.org.uk

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