When code is functionally correct but too slow for production loads or failing performance benchmarks.
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: Code Writing & Debugging - Use case: Performance Optimisation Advisor - Source task: - Analyse the following {{language}} code for performance issues: {{code}}. Context: this runs {{how_often}}. - Step 1: identify the top 3 performance bottlenecks (with Big-O analysis where relevant). - Step 2: for each bottleneck, explain why it is slow and what the optimised approach is. - Step 3: rewrite the performance-critical sections. - Step 4: estimate the improvement (e.g., '10x faster for 1M inputs'). # Goal Top-3 bottleneck analysis, optimised rewrites, and estimated performance improvement for each fix. # 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 Top-3 bottleneck analysis, optimised rewrites, and estimated performance improvement for each fix.
{{double-curly}} with your real context.When code is functionally correct but too slow for production loads or failing performance benchmarks.
Profile before optimising — guessing which part is slow is wrong 70% of the time. Even a simple timing wrapper before you use AI is better than nothing.
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.