Profiling Tools In Unity

Profiling measures how long each part of your game takes to run. It helps you find what's slowing down your game instead of guessing.

• Shows which functions take the most time.
• Identifies memory leaks.
• Helps optimize the right things.

Opening the Profiler

Method 1: Window - Analysis - Profiler.

Method 2: Ctrl + 7 (Windows) / Cmd + 7 (Mac).

Profiler Window Overview

The Profiler has several sections:

• CPU Usage: Time in scripts, physics, rendering.
• GPU Usage: Graphics processing time.
• Rendering: Draw calls, batches, triangles.
• Memory: RAM usage & garbage collection.
• Audio: Sound performance.
• Physics: 3D & 2D physics time.

Finding the Bottleneck

Click on a spike in the graph. Below, see exactly what caused it. Common spikes:

• Scripts: Your code taking too long (optimize!).
• Physics: Too many rigidbodies or complex collisions.
• Rendering: Too many draw calls.
• Garbage Collector: Too many Instantiate/Destroy calls.

Using Profile in Build (Test on Real Device)

Sometimes problems only happen in actual build, not Editor.

• File - Build Settings.
• Check "Development Build" and "Autoconnect Profiler".
• Build and run on device.
• Profiler automatically connects.

Memory Profiler

Find memory leaks (memory that keeps growing).

• Window -> Analysis -> Memory Profiler (install if needed).
• Take snapshots at different times.
• Compare snapshots to see what's not being freed.

Common memory issues:

• Not destroying objects.
• Event listeners not unsubscribed.
• Large textures not compressed.

Common Problems and Fixes