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Questions tagged jvm-hotspot

12 questions

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11
votes
1
answers

Why java.lang.Object.getClass() (and reflection) is slower than usual?

java reflection jvm jvm-hotspot
asked 2013-01-09T09:41:30.740
94
votes
1
answers

What does the UseCompressedOops JVM flag do and when should I use it?

java memory jvm jvm-hotspot
asked 2012-06-15T16:15:34.347
12
votes
1
answers

Java vs C# Multithreading performance, why is Java getting slower? (graphs and full code included)

java c# .net file-io jvm-hotspot
asked 2012-04-05T11:32:14.347
15
votes
2
answers

Hotspot7 hsdis PrintAssembly Intel Syntax

java assembly jvm-hotspot
asked 2012-02-18T01:25:22.163
54
votes
3
answers

-XX:MaxPermSize with or without -XX:PermSize

java jvm jvm-hotspot permgen
asked 2011-12-02T12:35:45.397
47
votes
3
answers

Default for XX:MaxDirectMemorySize

java memory-management jvm jvm-arguments jvm-hotspot
asked 2010-09-22T21:29:51.927
16
votes
2
answers

What do -XX:-PrintGC and XX:-PrintGCDetails flags do?

java garbage-collection jvm jvm-hotspot
asked 2009-11-29T12:29:05.373
47
votes
3
answers

Read Java JVM startup parameters (eg -Xmx)

java configuration jvm jvm-hotspot
asked 2009-10-05T03:59:12.473
41
votes
4
answers

How can I code Java to allow SSE use and bounds-check elimination (or other advanced optimizations)?

java performance optimization jvm-hotspot bounds-check-elimination
asked 2009-08-29T21:28:13.057
20
votes
6
answers

JVM -XX:+StringCache argument?

java jvm jvm-hotspot jvm-arguments
asked 2009-06-26T16:14:20.007
24
votes
2
answers

How do I programmatically find out my PermGen space usage?

java memory-leaks jvm-hotspot permgen
asked 2009-03-30T14:00:52.090
428
votes
11
answers

Real differences between "java -server" and "java -client"?

java jvm jvm-hotspot
asked 2008-10-13T18:40:13.260