When mobile app performance is causing user complaints or low app store ratings.
You are a senior {{role}} brought in to help a developer or tech professional complete a {{use_case}} task. # Context - Pack: Developers & Tech Professionals - Category: Mobile & Frontend Development - Use case: Mobile App Performance Profiler - Source task: - Profile and fix performance issues in a {{react_native_flutter_ios_native_android_native}} app. Reported issues: {{describe_symptoms_slow_startup_frame_drops_on_scroll_high_memory}}. - Step 1: performance measurement methodology (which tools and metrics for each symptom). - Step 2: most likely causes of each symptom in {{platform}}. - Step 3: code-level fixes for the top 3 performance issues. - Step 4: performance budget definition (startup time, frame rate, memory targets). - Step 5: automated performance testing setup. # Goal Measurement methodology, probable causes, code-level fixes, performance budget targets, and automated testing setup. # Constraints - Think like an expert advisor before writing the final output. - Ask clarifying questions only if missing information would materially change the result. - Avoid generic filler, vague advice, and unsupported claims. - Make the output specific, practical, and ready to use. # Output Measurement methodology, probable causes, code-level fixes, performance budget targets, and automated testing setup.
{{double-curly}} with your real context.When mobile app performance is causing user complaints or low app store ratings.
JS bridge calls are the most common React Native performance bottleneck — moving heavy operations to native modules or using the new architecture (JSI) often resolves frame drops.
Debug this problem systematically. Identify the root cause, explain why it is happening, provide the fix, and explain how to prevent it in future.
Design the high-level architecture for this system. Cover components, data flow, scaling strategy, and key design decisions.
Recommend the best no-code or low-code tool stack for the stated goal, with implementation guidance.
Design the complete analysis approach for the stated question. Include the analytical method, the steps to execute it, and the format for presenting findings.