Performance Optimization Wins in JME

Also, you might need some work on the diffs, because this PR, for example, seems legitimate ⚡️ Speed up method FluidSimHeightMap.load by 52% by codeflash-ai[bot] · Pull Request #24 · codeflash-ai/jmonkeyengine · GitHub , but it is very hard to review because the AI moved things around and basically the diff looks like a full rewrite of the file

This is another good PR ⚡️ Speed up method BufferRegion.getData by 6% by codeflash-ai[bot] · Pull Request #23 · codeflash-ai/jmonkeyengine · GitHub , but the diff is broken