2015.01.05 14:08 "Re: [Tiff] Fast TIFF Reading on Windows", by Aaron Boxer

On Mon, Jan 5, 2015 at 9:03 AM, Edward Lam <edward@sidefx.com> wrote:

On 04/01/2015 10:36 PM, Aaron Boxer wrote:

My very informal benchmark (windows 7, SSD, RamMAP tool to clear OS file cache before each run):

1. twiddling windows flags made no difference to speed
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.

I assume you mean "rm"? I don't think "u" has any meaning.

Hmmmmm. I have the latest code, and 'u' is used in this version to disable memory mapping.