Improved performance in the lwjgx backend (AWT and OpenGL)

[JNightRider]

Hello everyone, after a long time, I finally have some free time so I started working on the performance problem that lwjglx has when supporting OpenGL with AWT.

• In Linux, if the CPU doesn't have time to breathe, the context starts to fail. If this time is too long, it creates a bottleneck by causing a drop in FPS, which severely impacts performance.
• In Windows, if there is a pause to allow the CPU to breathe, the same synchronization problem arises because there are drastic drops in FPS; by removing that pause, things return to normal and the context problem is no longer present.
• Regarding macOS, I cannot comment since I do not have the equipment to perform performance tests, so it should continue to work the same way (works fine).

[ Screenshots ]

Linux

Before

With a maximum of 85 pfs, in theory it should reach the 144 pfs that this machine supports.

After

Then with the applied changes it can reach 145, (which is the maximum that this machine offers, so a high-end model should work as in a normal context without AWT)

Windows

Before

~ 60 fps

After

~140 fps