Posts Tagged: profiling
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How to Profile Flask Applications with py-spy Without Adding Code Instrumentation
py-spy Flask profiling no code changes: Attach to gunicorn PID, py-spy top reveals 90% CPU in slow endpoint loop, flamegraph.svg export. 5x speedup fixes. Benchmarks: 200req/s → 1000req/s. Keywords: 'profile flask app py-spy', 'flask performance without instrumentation', 'py-spy gunicorn flask', 'flask cpu profiler no decorators'.
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Python Performance Optimization: Profile, Optimize, and Benchmark Code Speedups
Python performance optimization guide: Profile with cProfile/py-spy, fix memory leaks with memory_profiler, speed up with Numba JIT and multiprocessing. Examples demonstrate up to 5-10x speedups and memory savings in loops, pandas, and APIs. Tested with Python 3.13 tools. Keywords: python performance optimization, optimize python code, python profiling cProfile py-spy, reduce python memory usage, python numba speedup, python multiprocessing performance.
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Reducing Flask Application Startup Time from 8 Seconds to 800ms
Flask startup optimization: Diagnose slow imports/extensions with py-spy/cProfile, implement lazy loading, disable debug mode, gunicorn preload/app factory. Benchmarks: 8.2s → 0.82s (90% faster). Fix dev restarts, serverless cold starts, k8s deployments.