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20030312 Wednesday March 12, 2003

RE: GC settings to improve Eclipse performance I changed my shorcut icon (Win2K) to have the following as it's target: 

eclipse.exe -vmargs -Xverify:none -XX:+UseParallelGC -XX:PermSize=20M  
 -XX:MaxNewSize=32M -XX:NewSize=32M -Xmx256m -Xms256m

Eclipse now starts in a mere 6 seconds (2 GHz Dell, 512 MB RAM). Without these extra settings, it takes 11 seconds to start. That's what I call a performance increase! Posted in Java at Mar 12 2003, 09:32:04 AM MST 2 Comments

Comments:

I tried this out, but the memory settings don't seem to have anything to do with startup time. 18 seconds - "eclipse.exe" 13 seconds - "eclipse.exe -vmargs -Xverify:none" 12 seconds - "eclipse.exe -vmargs -Xverify:none -XX:+UseParallelGC -XX:PermSize=20M -XX:MaxNewSize=32M -XX:NewSize=32M -Xmx96m -Xms96m" It's only the Xverify:none parameter which has a noticeable effect on reducing startup time. On the java website I found that this parameter turns off bytecode verification (http://developer.java.sun.com/developer/onlineTraining/Security/Fundamentals/Security.html), although the default is supposedly "only verify classes loaded over the network".

Posted by Anonymous on March 13, 2003 at 07:47 PM MST #

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Posted by ??? on June 29, 2005 at 05:15 AM MDT #

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Matt Raible is a Web Architecture Consultant specializing in open source frameworks.
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