Low-effort, high-impact app optimization - Ajesh Pai | droidcon india 2025

🎤 Talk: Low-effort, high-impact app optimization
👤 Speaker: Ajesh Pai
📍 Event: droidcon India 2025
📅 Date: December 13th, 2025

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This session provides a practical, low effort steps to inspect and improve performance.

- We will start with why you should care about performance
- Look at the benefits of R8
- We will enable R8, and intentionally trigger a common crash (e.g., from reflection).
- Use R8's tools like retrace to de-obfuscate the stack trace and find the true root cause.
- Analyze R8's configuration path and output files (like configuration.txt) to understand why R8 removed the specific class or method.
- Write a specific, narrow keep rule that fixes the bug without unnecessarily bloating your app.
- Look at how to test R8 enabled builds
- Add Profile guided optimizations to improve startup performance
- Wrap it up

This session will give you the tools and confidence to diagnose any R8-related issue and write precise, efficient keep rules.

Attendees will leave this session knowing how to:

- Implement R8 in a new or existing Android project correctly.
- Debug minified apps by de-obfuscating stack traces to find the real source of a crash.
- Analyze R8's build outputs to understand what code was kept, removed, and why.
- Identify the root cause of common R8 issues, especially those related to reflection, serialization, or JNI.
- Write effective, narrow keep rules that target the specific problem instead of using broad rules that harm optimization.
- Verify R8's configuration to ensure your rules are being applied as expected and are having the intended effect.
- Implement Profile guided optimizations
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Hashtags:
#AndroidDev #R8 #AppOptimization #droidcon #MobileEngineering

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