|TIFF and LibTiff Mailing List Archive|
LibTiff Mailing List
2015.01.05 13:47 "Fwd: Fast TIFF Reading on Windows", by Aaron Boxer
---------- Forwarded message ---------- From: Aaron Boxer <email@example.com> Date: Mon, Jan 5, 2015 at 8:47 AM Subject: Re: [Tiff] Fast TIFF Reading on Windows To: John Cupitt <firstname.lastname@example.org> On Mon, Jan 5, 2015 at 4:53 AM, <email@example.com> wrote: > On 5 January 2015 at 03:36, Aaron Boxer <firstname.lastname@example.org> wrote: > > 2) TIFFOpenfile with mode "ru" i.e. disabling memory mapping, was 3 times > > slower than with default flag "r" > > > > So, my conclusion is that memory mapping is the way to go for > performance. > > That's interesting. I tried on linux and the situation is roughly > reversed: with the disc cache empty, mmap() is about half the speed of > vanilla read() (for me). This is for a a simple scan of a 300mb strip > tiff on an HDD. I'm always surprised how different the filesystems > are. > > Very interesting. I am curious to see what happens on Linux with SSD.