The Unity Profiler is built into the Unity Editor itself and provides an expedient way of narrowing down our search for performance bottlenecks by generating usage and statistics reports on a multitude of Unity3D subsystems during runtime. The different subsystems for which it can gather data are listed as follows:
- CPU consumption (per-major subsystem)
- Basic and detailed rendering and GPU information
- Runtime memory allocations and overall consumption
- Audio source/data usage
- Physics engine (2D and 3D) usage
- Network messaging and operation usage
- Video playback usage
- Basic and detailed user interface performance
- Global Illumination (GI) statistics
There are generally two approaches to making use of a profiling tool: instrumentation and benchmarking (although, admittedly, the two terms are often used interchangeably).
Instrumentation...