Performance Profiler

Performance profiler

Performance profiling helps you see where your app or game slows down. It watches the cpu, memory, and loading time while the program runs. With clear numbers and charts, you can spot heavy functions, big images, or loops that waste time. This matters because small delays add up and make users feel the app is sticky or broken. By measuring first and guessing less, you fix the right things and keep the experience smooth for everyone, even on older devices.

How do I start profiling?

Start by picking a scene or screen that feels slow, then run your app with the profiler open. Record a short session while you click, scroll, or play as normal. Stop recording and look for spikes, which are tall peaks that mark delays. Click a spike to see the function list and sort by time. Note the biggest items and repeat to confirm the pattern. This simple loop—record, read, and repeat—keeps you focused on fixes that matter instead of random changes.

What should I measure first?

• Check frame time to see if each frame is smooth.
• Watch cpu usage during heavy actions.
• Track memory growth after repeated steps.
• Measure loading time for big assets.

How can I read the charts?

Look for steady parts and noisy parts. Steady parts mean your code is fine. Noisy parts show jumps that users can feel. Zoom into a jump and read which functions took the most time. If one call repeats many times, try caching. If one step allocates many objects, reuse them. If draw calls are high, batch them. Reading the chart is like reading a story: who did the work, how long it took, and how often it happens.

Which fixes give fast wins?

Focus on the biggest blocker first. Reduce image sizes, skip hidden work, and move slow tasks off the main thread. Replace slow loops with lookups, and avoid doing the same calculation twice. Use lazy loading so heavy parts wait until needed. After each change, run the profiler again to make sure the fix truly helps. One clear win is better than ten tiny tweaks that no one notices.

How do I test on different devices?

Create a short test path, like opening the app, browsing a list, and starting a level. Run this path on a low end phone, a mid device, and a strong one. Record the frame time and memory for each. If the low end device drops frames, try lighter textures or simpler effects there. Testing across devices keeps the experience fair, so kids with older phones can enjoy the app too.

What habits keep performance healthy?

Profile early and often, not only at the end. Keep assets tidy, remove unused files, and set budgets for image size and memory. Add small tests that warn you when frame time jumps. Write notes about each fix so the team learns what worked. These habits turn performance into a normal part of building, not a scary rush right before release.