Coding & Debugging
PromptBeginner5 minmarkdown
- **Synchronous blocking in async code**: Blocking the event loop or thread pool with synchronous operations
destroying concurrency benefits
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Coding & Debugging
PromptBeginner5 minmarkdown
Write all proposed optimizations and any code snippets to `TODO_perf-tuning.md` only. Do not create any other files. If specific files should be created or edited
include patch-style diffs or clearly labeled file blocks inside the TODO.
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Data
PromptBeginner5 minmarkdown
- **N+1 query patterns**: Fetching related data in loops instead of using joins or batch queries
multiplying database round-trips linearly
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Data
PromptBeginner5 minmarkdown
- **Missing database indexes**: Full table scans on frequently queried columns
causing query times to grow linearly with data volume
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Data
PromptBeginner5 minmarkdown
### Database (Query Analyzers
Index Tuning)
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Coding & Debugging
PromptBeginner5 minmarkdown
- Use language-specific CPU and memory profilers (pprof for Go
py-spy for Python
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Data
PromptBeginner5 minmarkdown
- Deploy Application Performance Monitoring (Datadog
New Relic
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Productivity
PromptBeginner5 minmarkdown
- Run Lighthouse for automated audits covering LCP
FID
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Data
PromptBeginner5 minmarkdown
- Use reproducible benchmarks with consistent hardware
data volume
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Coding & Debugging
PromptBeginner5 minmarkdown
- [ ] API response times meet SLA: <200ms (p95) for standard endpoints
<50ms (p95) for database queries
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Coding & Debugging
PromptBeginner5 minmarkdown
- Correlate bottlenecks with specific code paths
queries
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Coding & Debugging
PromptBeginner5 minmarkdown
- **API**: Payload size reduction
compression (gzip
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Communication
PromptBeginner5 minmarkdown
- **Microservices**: gRPC for inter-service communication
message queues for decoupling
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Coding & Debugging
PromptBeginner5 minmarkdown
- **Frontend**: Code splitting
tree shaking
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Productivity
PromptBeginner5 minmarkdown
- **Async**: Promise.all() for parallel operations
worker threads for CPU-bound tasks
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Coding & Debugging
PromptBeginner5 minmarkdown
- **Techniques**: Dynamic programming
memoization
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Data
PromptBeginner5 minmarkdown
- **Data Structures**: Map vs Object for lookups
Set vs Array for uniqueness
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Coding & Debugging
PromptBeginner5 minmarkdown
- Define performance budgets for critical paths (API response times
page load metrics
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Data
PromptBeginner5 minmarkdown
- Apply specific optimizations based on profiling data: select optimal data structures
implement caching
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Data
PromptBeginner5 minmarkdown
- Analyze database query patterns for N+1 problems
unnecessary joins
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Data
PromptBeginner5 minmarkdown
- Record reproducible benchmark conditions (hardware
data volume
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Data
PromptBeginner5 minmarkdown
- Collect database query execution plans to identify slow operations
missing indexes
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Coding & Debugging
PromptBeginner5 minmarkdown
Follow this systematic approach to deliver measurable
data-driven performance improvements while maintaining code quality and reliability.
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Data
PromptBeginner5 minmarkdown
- **Tune database query performance** by analyzing execution plans
eliminating N+1 problems
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