NSImage / large image performance hit / memory paging bug ?
NSImage / large image performance hit / memory paging bug ?
- Subject: NSImage / large image performance hit / memory paging bug ?
- From: Robert Miller <email@hidden>
- Date: Mon, 16 Jul 2001 17:15:32 -0400
- Organization: RFM & Associates
Hello,
I'm working with large bitmap images that are up to 'E' sized Group4
compressed Tiff images that are appx. 8800 x 6800 pixels and 200 dpi.
The problem that occurs is when attempting to instantiate and NSImage
from either an NSURL or simply an NSData object the system sits and
hammers on my hard disk for over 5 minutes or more just to get the
initial rendering. If I apply any sort of matrix for rotation and/or
scaling to the image the system basically chokes again and hammers on
the hard drive to do what I am assuming is caching to virtual memory.
This performance hit is unacceptable, is there a way around this sort of
problem when dealing with large images ?
Thanks in advance for any insight
Regards,
Bob M.