General
PromptBeginner5 minmarkdown
- Baseline metrics: response time (p50
p95
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General
PromptBeginner5 minmarkdown
In `TODO_perf-tuning.md`
include:
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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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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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General
PromptBeginner5 minmarkdown
- **Memory leaks under load**: Allocations growing without bound in long-running processes
leading to OOM crashes in production
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General
PromptBeginner5 minmarkdown
- Monitor slow query logs and set appropriate thresholds (e.g.
>50ms for OLTP queries)
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General
PromptBeginner5 minmarkdown
- Implement distributed tracing (Jaeger
Zipkin) to identify cross-service latency bottlenecks
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General
PromptBeginner5 minmarkdown
- Run load tests with k6
JMeter
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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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General
PromptBeginner5 minmarkdown
### Backend (APM
Profilers
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General
PromptBeginner5 minmarkdown
### Frontend (Chrome DevTools
Lighthouse
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General
PromptBeginner5 minmarkdown
- Provide alternative solutions when trade-offs exist (in-place vs additional memory
speed vs memory)
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General
PromptBeginner5 minmarkdown
- Address scalability: proactively consider expected input size
memory limitations
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General
PromptBeginner5 minmarkdown
- Identify constraints
input/output requirements
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General
PromptBeginner5 minmarkdown
- Remember that premature optimization is counterproductive
but strategic optimization is essential
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General
PromptBeginner5 minmarkdown
- Consider the full system impact of optimizations
not just local improvements
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General
PromptBeginner5 minmarkdown
- Capture percentiles (p50
p95
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General
PromptBeginner5 minmarkdown
- [ ] All optimizations are documented with rationale
measured impact
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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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General
PromptBeginner5 minmarkdown
After completing optimization
verify:
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General
PromptBeginner5 minmarkdown
- [ ] Frontend metrics meet targets: LCP <2.5s
FID <100ms
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General
PromptBeginner5 minmarkdown
- Implement optimizations incrementally
measuring after each change
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General
PromptBeginner5 minmarkdown
- Document trade-offs: readability vs performance
memory vs CPU
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Coding & Debugging
PromptBeginner5 minmarkdown
- Correlate bottlenecks with specific code paths
queries
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