Series

The measurement problem

Each entry breaks a tool the previous one used: what the profiler charges, what the benchmark harness turns off, and what the measurement allocates.

In reading order · 1 entry

  1. Part 1

    cProfile Slowed It 2.9x and Moved the Ranking by One Point

    cProfile adds a flat 25 to 30 ns to every call it observes. That inflates a 47 ns function's reported time by 1.57x and a one-microsecond function's by nothing at all.

Python, its runtimes, frameworks, and the systems beneath them — read from source, measured, not assumed.

Arrow keys to move, Enter to open.