Every Simulator hot reload adds css watcher process to CPU

[Eric-Chomba]

A new theme-css -watch process is added to CPU everytime simulator is hot reload. This consumes more RAM & CPU to point where it throws the following java heap exception. Eg. in this case hot reload renders multiple images in a InfiniteScrollAdapter.

[EDT] 0:7:16,943 - Exception: java.lang.OutOfMemoryError - Java heap space
java.lang.OutOfMemoryError: Java heap space
        at java.desktop/java.awt.image.DataBufferInt.<init>(DataBufferInt.java:75)
        at java.desktop/java.awt.image.Raster.createPackedRaster(Raster.java:467)
        at java.desktop/java.awt.image.DirectColorModel.createCompatibleWritableRaster(DirectColorModel.java:1032)
        at java.desktop/java.awt.image.BufferedImage.<init>(BufferedImage.java:333)
        at com.codename1.impl.javase.JavaSEPort.createTrackableBufferedImage(JavaSEPort.java:6827)
        at com.codename1.impl.javase.JavaSEPort.createMutableImage(JavaSEPort.java:6924)
        at com.codename1.ui.Image.createImage(Image.java:362)
        at com.codename1.ui.Image.createImage(Image.java:304)
        at com.myapp.ClassName.functionName(ClassName.java:1064)
        at com.com.myapp.ClassName.lambda$infiniteAdapter$19(ClassName.java:895)
        at com.com.myapp.ClassName$$Lambda$240/0x0000000100448440.run(Unknown Source)
        at com.codename1.ui.Display.executeSerialCall(Display.java:1281)
        at com.codename1.ui.Display.processSerialCalls(Display.java:1265)
        at com.codename1.ui.Display.edtLoopImpl(Display.java:1208)
        at com.codename1.ui.Display.mainEDTLoop(Display.java:1061)
        at com.codename1.ui.RunnableWrapper.run(RunnableWrapper.java:139)
        at com.codename1.impl.CodenameOneThread.run(CodenameOneThread.java:179)

I am using Ubuntu 22.04.1 LTS

Screenshot showing added processes in every hot reload

Can hot reload reuse same theme-css -watch process or automatically stop previous process first?

[shai-almog]

Interesting. This isn't new but we made a lot of changes to that code so I'll look into it. Thanks.

[Eric-Chomba]

Before opening them as discussion, I had tried to open issues but I can only edit title. all other sections (Summary, Minimal reproducer etc) aren't editable.

[shai-almog]

Odd. I just tried this on my machine and everything was editable. This is standard github functionality (not our code) so everything should work. Can you see if there are errors in the JavaScript console or if it works in a different browser?

[Eric-Chomba]

Yes it shows this error when I try to edit summary. I will have to install another browser to see if problem occurs there too

[shai-almog]

You need to update your version of firefox, you're using a very old version and that form uses a JavaScript function (Array.prototype.toSorted()) that was added in version 115 (back in 2023): https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Releases/115

Unfortunately, this form is from github and not under our control.

[Eric-Chomba]

You're right. Browser is the problem. I can open issue using Opera browser.