py-spy> Sampling process 500 times a second for 14 seconds. Press Control-C to exit.
[2026-11-09T03:59:22.035877254Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 12 native and 13 python)
[2026-11-09T03:59:22.037108411Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 12 native and 13 python)
[2026-11-09T03:59:22.037790288Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 12 native and 13 python)
[2026-11-09T03:59:22.038429632Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 12 native and 13 python)
[2026-11-09T03:59:22.039039879Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 12 native and 13 python)
[2026-11-09T03:59:22.042359571Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 12 native and 13 python)
[2026-11-09T03:59:22.044735759Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 12 native and 13 python)
[2026-11-09T03:59:22.792297832Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:23.023090104Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:23.269367462Z WARN py_spy] Failed to get stack trace from 53921: UNW_EINVAL: unsupported operation or bad value
[2026-11-09T03:59:23.270143097Z WARN py_spy] Failed to get stack trace from 53921: UNW_EINVAL: unsupported operation or bad value
[2026-11-09T03:59:23.270819340Z WARN py_spy] Failed to get stack trace from 53921: UNW_EINVAL: unsupported operation or bad value
[2026-11-09T03:59:23.271966722Z WARN py_spy] Failed to get stack trace from 53921: UNW_EINVAL: unsupported operation or bad value
[2026-11-09T03:59:23.272629093Z WARN py_spy] Failed to get stack trace from 53921: UNW_EINVAL: unsupported operation or bad value
[2026-11-09T03:59:23.284496040Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:23.612864335Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:23.615444862Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:23.615798902Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:23.616383838Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:23.616792515Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:23.617212972Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:24.764551105Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:24.908140421Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:25.094766125Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:25.139246489Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:25.383822941Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:25.384594393Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:25.385820870Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:25.466829932Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:25.949502499Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:26.043298740Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:27.000113064Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:27.055202969Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:27.056145860Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:27.713508792Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:28.236607686Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:28.537169212Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:28.537662141Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:28.683441607Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:29.614083526Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:29.614391547Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:29.736520082Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:29.742419891Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:30.347465195Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:30.683512246Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:30.736748088Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:30.922533405Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:30.923007959Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:31.745289813Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:32.610334301Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:33.103125446Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:33.794274287Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
[2026-11-09T03:59:33.794835838Z WARN py_spy] Failed to get stack trace from 53921: Failed to merge native and python frames (Have 1 native and 7 python)
py-spy> Wrote raw flamegraph data to 'bench/profiles/before-raw/stacks.txt'. Samples: 6195 Errors: 53
py-spy> You can use the flamegraph.pl script from https://github.com/brendangregg/flamegraph to generate a SVG