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stephengold / jme-vehicles

A tech demo and library for simulating vehicles in jMonkeyEngine
BSD 3-Clause "New" or "Revised" License
17 stars 7 forks source link

RAM Usage and Low FPS after playing few minutes. At start 60 FPS but after few time 18 FPS. #8

Closed IndieDev99 closed 1 year ago

stephengold commented 1 year ago

How much RAM usage? And how measured? Which JVM (i.e. OpenJDK 64-Bit Server VM build 11.0.17+8)? Which platform (i.e. Windows or Linux)? How built (per instructions in the README? downloaded v1.5.0 release? built from top-of-tree?)

IndieDev99 commented 1 year ago

How much RAM usage? And how measured? Which JVM (i.e. OpenJDK 64-Bit Server VM build 11.0.17+8)? Which platform (i.e. Windows or Linux)? How built (per instructions in the README? downloaded v1.5.0 release? built from top-of-tree?)

JRE 8 Windows 8.1 64 bit Nvidia Quadro 2000 1gb ddr5 graphics OpenGL 4.3 16GB RAM 4.2 GB Usage on start and 5 GB Usage with stuttering issues on 18 fps. I am running demo. "Maven demo". I am new to Java game development. Just wanted to test "how much optimized jmonkeyengine is ".

stephengold commented 1 year ago

Since you're evaluating JMonkeyEngine, I hope you tested other applications as well!

Thank you for the details provided. However, you didn't answer all my questions.

  1. How was RAM usage measured?
  2. Did you download the pre-built MavDemo1.zip? Or did you build the demo from the source code?

I have a couple ideas what might be causing the performance issue, but first I want to reproduce your test as closely as I can.

IndieDev99 commented 1 year ago

Since you're evaluating JMonkeyEngine, I hope you tested other applications as well!

Thank you for the details provided. However, you didn't answer all my questions.

  1. How was RAM usage measured?
  2. Did you download the pre-built MavDemo1.zip? Or did you build the demo from the source code?

I have a couple ideas what might be causing the performance issue, but first I want to reproduce your test as closely as I can.

-) I didn't measured RAM by jme tools I measured it using windows 8.1 task manager. -) No. I just downloaded old 2021 maven demo. Which is a .bat file in a sub directory of demo. I installed 64 bit JRE 1.8. -) Yes I tested other applications those were great like Post Water and Physics tests.

....... I am Unity game engine user. I don't know much about java and jmonkeyengine but I want to learn. Jmonkeyengine is a great platform for 3D games.

stephengold commented 1 year ago

Thanks for working with me. I'll investigate and report back here.

At the very least, I should publish an updated release of this project!

IndieDev99 commented 1 year ago

Thanks for working with me. I'll investigate and report back here.

At the very least, I should publish an updated release of this project!

I will be waiting ! And will try when you upload demo again !

stephengold commented 1 year ago

I tried to reproduce this issue on my Windows 11 laptop. I downloaded the v1.5 release of MavDemo1.zip and ran MavDemo1.bat from Explorer. I played with it for 20 minutes and didn't observe any stutter or frame drops. At the end of 20 minutes, Task Manager showed the app ("OpenJDK platform binary") to be using 1876 MB of memory. I have several versions of Java installed; the one actually used was Temurin-17.0.3

There are many differences that might account for the negative result:

I suspect that the Java version is the key difference here. I believe garbage collection in Java 17 is more efficient than in 1.8.

@IndieDev99 Is there any possibility of installing a later version of Java on your test machine? You can download recent Java from https://adoptium.net/temurin/releases/

IndieDev99 commented 1 year ago

Thank You very much for everything ( for your time and kind reply). I will try it !!

IndieDev99 commented 1 year ago

The problem was old dated graphics drivers and Windows 8.1 was not updated !

stephengold commented 1 year ago

Thank you for reporting the resolution of this issue. I'm glad it's solved.