Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!zaphod.mps.ohio-state.edu!usc!sdsu!whitney
From: whitney@sdsu.edu (Roger Whitney)
Newsgroups: comp.lang.smalltalk
Subject: performance question about ST80 v2.5 on MacII
Message-ID: <1989Dec12.202546.11965@sdsu.edu>
Date: 12 Dec 89 20:25:46 GMT
Reply-To: whitney@sdsu.sdsu.edu (Roger Whitney)
Distribution: usa
Organization: San Diego State University, Math/Sciences Dept.
Lines: 24


	I have been using Smalltalk-80 v2.3 from ParcPlace on a Macintosh II 
computer with 5M of memory.  When I received my upgrade to v2.5 I noticed 
a decrease in response of the windows.  In particular the first time a 
window (say the browser) is created one to three seconds pass before the 
window appears.  This is just long enough to be troubling.  Response time 
improves after the first usage (as long the compiled version is still in the 
native-method zone?).  I ran the standard benchmarks in v2.3 and v2.5 and 
found v2.5 slower in screen io.

	My questions are:

1) Am I the only one that experiences this delay? Have I installed v2.5 
incorrectly?

	I assume that the delay is caused by compiling methods to native code 
for the first time, after which it is stored in native-method zone. 

2) Does this means a similar delay occurs on other platforms? Is in 
particular does this occur on Mac IIcx or Suns?

roger whitney
whitney@sdsu.edu
ucsd!sdsu!whitney