Godot Performance Optimization

This is your troubleshooting kit for Godot frame drops and memory leaks. It covers the profiler-driven workflow you should always start with, then gives you ten scripts for common bottlenecks: object pooling, WorkerThreadPool offloading, MultiMesh instancing, manual culling with VisibleOnScreenNotifier, and direct RenderingServer calls to bypass scene tree overhead. The NEVER section is solid, especially the reminder to profile before optimizing and the shader precompilation differences between Forward+ and Compatibility renderer. Includes a pathfinding throttler pattern and VRAM compression guidance for desktop versus mobile. Useful when you're hunting CPU spikes in a bullet hell or optimizing AI crowd pathfinding.