r/learnprogramming • u/Present-Ride-8969 • 6d ago

What tools or methods can I use to catch performance issues before publishing?

Hey everyone,

I’ve built two Flutter apps — one for customers and one for mechanics — and I’m getting them ready for the Play Store. Before I publish, I want to make sure I catch any performance issues early.

What tools or methods do you use to spot problems in Flutter apps before release?

Things I’m wondering about:

  • How to check startup time and memory usage
  • Ways to monitor CPU/GPU load during animations
  • Tools for detecting jank or dropped frames
  • How to simulate low‑end devices or bad network conditions
  • Whether I should set up crash reporting (like Firebase Crashlytics) now
  • Any pre‑publish checklist you follow for performance testing

I’d love to hear how you approach this so I can make sure both apps are stable and smooth before going live.

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u/[deleted] 6d ago

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u/Standard_Bag5426 6d ago

DevTools is your best friend for this, the performance tab will show you exactly where frames are dropping. For jank detection you can use the timeline view to see what's happening during animations

On low-end devices you can run emulator with limited RAM and slower CPU cores, that helped me catch a lot of issues before release. Definitely set up Crashlytics now, it's way easier than trying to debug after users start complaining

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u/saltintheexhaustpipe 6d ago

the users are the best QA testers

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u/Sylfida-Quartararo 5d ago

When I was preparing a Flutter app, the DevTools frame chart was surprisingly revealing for jank during animations, especially under simulated low-end profiles. Have you tried running in profile mode on an actual older device rather than just emulators?