Game running at 18 fps in exported jar, and 40 fps in Eclipse?

Question

I'm currently making a 3d game in Java. My problem is when I run it through Eclipse, I'm getting about 40 fps, which is fine. Though when I run it in an exported jar file, I'm getting 18 fps?

I'm not really sure what's wrong, does anyone know what the problem could be?

Answer 1

Hard to tell without more info but some possibilities are:

• different JVM being used by Eclipse than your default system JVM
• different command-line parameters (especially ones relating to graphics) between your commandline invocation and your Eclipse run profile
• copies of the application still 'live' within Eclipse and stealing resources from the external copy