B4J Question JAR startup slowly

[carycai]

I write a B4J UI program running in Raspberry pi,use the command: java -jar xx.jar.It takes about 10 seconds to startup completely.It is too slowly.Is there any solution?
Ps:the same program run in windows just need 1 second to show the UI.

 

[KMatle]

Increase the memory for the graphics (card): https://www.raspberrypi.org/documentation/configuration/config-txt/memory.md

 

[carycai]

Increase the memory for the graphics (card): https://www.raspberrypi.org/documentation/configuration/config-txt/memory.md

I use raspi-config command,menu:memory-split,set the memory to 256,nohting improved,even slower.
My pi model is 3B,mem is 895M

 

[carycai]

Is there any other solutions?

 

[tchart]

What JRE/JDK are you using on each system?

I noticed on another application I adminster (not a B4X application) slowed down considerably when the vendor switched from Oracle JDK to Open JDK.

Also, why dont you add some logging to see what is taking so long during start up.

I'm surprised you get 1 second launch times. I have a new laptop (32gb RAM, Ryzen 5, SSD, 1060 GTX) and any B4X UI app I launch takes around 3-5 seconds.

 

[carycai]

JDK:
openjdk 11.0.1-BellSoft 2018-10-16
OpenJDK Runtime Environment (build 11.0.1-BellSoft+0)
OpenJDK Server VM (build 11.0.1-BellSoft+0, mixed mode)

Loading log -> attach file(two files);

 

[tchart]

@carycai have you manually timed it with all logging turned off?

I have also experienced slow start ups with some app if you are writing to disk - for example I had a web app on Azure App Service which has very slow disk read/write, when Imoved it to another Linux host it was very fast. I bring this up since your Pi is most likley writing to an SD card which is not as fast as true disk.