karatasi - flip cards on iPhone / java / #223 java application very very slow

Christa Runge - 2010-05-05

I tested the download (release 0.2.1), but I see no issue with the performance. Only for *very* large tables the scrolling could be faster.
Can it be your Java version? I have 1.5, and only a 32 bit machine.

My configuration:
Mac OS X 10.5.8 (Leopard), Processor 2 GHz Intel Core Duo, Memory 1.5 GB.

My Runtime Properties as seen in the karatasi help menu:
java.vendor=Apple Inc.
java.vendor.url=http://www.apple.com/
java.vendor.url.bug=http://bugreport.apple.com/
java.version=1.5.0_22
java.vm.info=mixed mode, sharing
java.vm.name=Java HotSpot(TM) Client VM
java.vm.specification.name=Java Virtual Machine Specification
java.vm.specification.vendor=Sun Microsystems Inc.
java.vm.specification.version=1.0
java.vm.vendor=Apple Inc.
java.vm.version=1.5.0_22-147

My Java version as seen on the command line:
$ Java -version
java version "1.5.0_22"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_22-b03-333-9M3125)
Java HotSpot(TM) Client VM (build 1.5.0_22-147, mixed mode, sharing)

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Christa Runge - 2010-05-09

assigned_to: nobody --> ndegendogo
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Christa Runge - 2010-05-09

Observation: The current implementation opens and closes the database all the time which is nonsense. I have opened the tracker item #2999044 for this issue.
Still I cannot believe that this is the whole story (why is it so much slower on a Java-6 machine than on a Java-5 machine??).

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Christa Runge - 2010-05-11

Luboš writes (see his emails of 10-May-2010):

I have noticed this performance issue too but I ignored it. In the evening I will send you what java I use.
I used only 32 bit java for development even on 64 bit hardware because of java problems. I suppose that Mathias' command-line java is JRE and Eclipse one is JDK.

So I have 64bit Java too:

banter:~ lubos$ java -version
java version "1.6.0_17"
Java(TM) SE Runtime Environment (build 1.6.0_17-b04-248-10M3025)
Java HotSpot(TM) 64-Bit Server VM (build 14.3-b01-101, mixed mode)

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Christa Runge - 2010-05-11

karatasi has a tab with runtime properties in its help menu.

Starting karatasi from the command line on Mathias' machine has unacceptable slow execution and gives:

java.runtime.name=Java(TM) SE Runtime Environment
java.runtime.version=1.6.0_17-b04-248-9M3125
java.specification.name=Java Platform API Specification
java.specification.vendor=Sun Microsystems Inc.
java.specification.version=1.6
java.vendor=Apple Inc.
java.vendor.url=http://www.apple.com/
java.vendor.url.bug=http://bugreport.apple.com/
java.version=1.6.0_17
java.vm.info=mixed mode
java.vm.name=Java HotSpot(TM) 64-Bit Server VM
java.vm.specification.name=Java Virtual Machine Specification
java.vm.specification.vendor=Sun Microsystems Inc.
java.vm.specification.version=1.0
java.vm.vendor=Apple Inc.
java.vm.version=14.3-b01-101

Starting karatasi from Eclipse on the same machine has normal speed and gives:

java.library.path=.:/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java
java.runtime.name=Java(TM) 2 Runtime Environment, Standard Edition
java.runtime.version=1.5.0_22-b03-333-9M3125
java.specification.name=Java Platform API Specification
java.specification.vendor=Sun Microsystems Inc.
java.specification.version=1.5
java.vendor=Apple Inc.
java.vendor.url=http://www.apple.com/
java.vendor.url.bug=http://bugreport.apple.com/
java.version=1.5.0_22
java.vm.info=mixed mode, sharing
java.vm.name=Java HotSpot(TM) Client VM
java.vm.specification.name=Java Virtual Machine Specification
java.vm.specification.vendor=Sun Microsystems Inc.
java.vm.specification.version=1.0
java.vm.vendor=Apple Inc.
java.vm.version=1.5.0_22-147

The Java-6 provided by Apple seems not to support a 32 bit mode:
nungu:karatasi-java.trunk mathiasx$ java -jar dist/karatasi.jar -d32
Cannot run Java in 32 bit mode. Continuing in 64 bit mode.

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Christa Runge - 2010-05-11

Again on the Java-6 machine, I used the Java Preferences.app to configure Java programs started from the command line to run with other VM implementations.

Java-5, 32 bit: normal speed.
java version "1.5.0_22"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_22-b03-333-9M3125)
Java HotSpot(TM) Client VM (build 1.5.0_22-147, mixed mode, sharing)
Runtime properties:
java.home=/System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Home
java.io.tmpdir=/var/folders/Nv/NvsNx+UxH6q7ivJmwjqUe++++TQ/-Tmp-/
java.library.path=.:/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java
java.runtime.name=Java(TM) 2 Runtime Environment, Standard Edition
java.runtime.version=1.5.0_22-b03-333-9M3125
java.specification.name=Java Platform API Specification
java.specification.vendor=Sun Microsystems Inc.
java.specification.version=1.5
java.vendor=Apple Inc.
java.vendor.url=http://www.apple.com/
java.vendor.url.bug=http://bugreport.apple.com/
java.version=1.5.0_22
java.vm.info=mixed mode, sharing
java.vm.name=Java HotSpot(TM) Client VM
java.vm.specification.name=Java Virtual Machine Specification
java.vm.specification.vendor=Sun Microsystems Inc.
java.vm.specification.version=1.0
java.vm.vendor=Apple Inc.
java.vm.version=1.5.0_22-147

Java-5, 64 bit: slow.
nungu:karatasi-java.trunk mathiasx$ java -version
java version "1.5.0_22"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_22-b03-333-9M3125)
Java HotSpot(TM) 64-Bit Server VM (build 1.5.0_22-147, mixed mode)
Runtime properties:
java.home=/System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Home
java.io.tmpdir=/var/folders/Nv/NvsNx+UxH6q7ivJmwjqUe++++TQ/-Tmp-/
java.library.path=.:/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java
java.runtime.name=Java(TM) 2 Runtime Environment, Standard Edition
java.runtime.version=1.5.0_22-b03-333-9M3125
java.specification.name=Java Platform API Specification
java.specification.vendor=Sun Microsystems Inc.
java.specification.version=1.5
java.vendor=Apple Inc.
java.vendor.url=http://www.apple.com/
java.vendor.url.bug=http://bugreport.apple.com/
java.version=1.5.0_22
java.vm.info=mixed mode
java.vm.name=Java HotSpot(TM) 64-Bit Server VM
java.vm.specification.name=Java Virtual Machine Specification
java.vm.specification.vendor=Sun Microsystems Inc.
java.vm.specification.version=1.0
java.vm.vendor=Apple Inc.
java.vm.version=1.5.0_22-147

So the key seems to be indeed the 32 bit Java.

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Mathias Kussinger - 2010-05-13

fixed with svn2464. We did remove many many database accesses. Now all data are cached. Works now well on my 64Bit Mac Java.

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Mathias Kussinger - 2010-05-13

assigned_to: ndegendogo --> kussinger

status: open --> closed
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Christa Runge - 2017-07-29

Ticket moved from /p/karatasi/bugs/282/

Can't be converted:

_milestone: java_0.2
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java application very very slow

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#223 java application very very slow

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