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From: wayne@helix.nih.gov (Wayne Rasband)
Newsgroups: comp.sys.mac.programmer
Subject: Slow NewPtr on fx
Message-ID: <478@nih-csl.nih.gov>
Date: 4 Sep 90 14:12:05 GMT
Sender: news@nih-csl.nih.gov
Organization: NIH
Lines: 10

After upgrading my cx to an fx, I noticed a curious phenomenon with the 
public domain image processing program(NIH Image) I'm developing: it was 
taking much longer to open a large number of windows. On the cx, Image can 
open 50 256x256 MRI Scans in 24 seconds, but on the fx, it takes 135 
seconds. After putting in some debugging code, I discovered that the 
NewPtr call used to allocate the 64K PixMap for each window was taking 
about 1/4 second on the cx, and an incredible five seconds(!!!) on the fx. 
Does someone know why NewPtr is up to 20 times slower on the fx?

Wayne Rasband (wayne@helix.nih.gov)