I have a 1.67ghz powerbook and I'm trying to run freeplane and it is really slow. I mean it takes like 5 seconds to even open up a menu. It is not nearly as slow on an Intel based linux machine of roughly the same clock rate. In fact, my Intel has 1G of ram and the powerbook has 2.

Nothing else really seems to suffer performance wise. I've even tried switching jvms and upgraded freeplane to the beta version but it does not help. Top shows the java process is sucking over 80% of the cpu time even when freeplane is sitting idle doing nothing.

Any ideas on how to fix?

TIA,
-Kevin

It probably isn't java, but a lack of hardware video acceleration.

I recently updated the Ubuntu Java wiki with PowerPC info.

I have a less powerfull machine than you, but can't replicate your problems. At idle, freeplane/java CPU usage barely registers. Does your 5 second menu problem occur with some super complex diagram setup or something?

The default openjdk 6 jvm is okay, jamvm performance is better.

Hardware acceleration may make a slight difference, but not much. The Ubuntu PowerPC FAQ tells you all you need to know about that.

IBM makes a Java SDK for PowerPC - In my experience, it has much better performance than open JDK. It can be a bit of a pain to set up though... You will need to manually add it to update-alternatives.

Here is a link:
http://www.ibm.com/developerworks/java/ ... html#java6

The download comes in the form of a .bin file. I had to use chmod +x to make it executable:



Then, once it was finished extracting the SDK, I did the following:
*Replace <MY_JAVASDK_PATH> with the path you extract the .bin file to.


after adding them to update alternatives, I then selected them with the following command and selecting the appropriate versions:


After that I added the following to the end of my ~/.zshrc file ( Note: edit ~/.bashrc if you don't use zsh ) - This step is probably only neccessary if you want to write some java code: