2026-06-24T15:42:07.243116000+0200 maurycy@gimel /Users/maurycy/work/cpython (rle-overlow-fixed ee78d43+) % ./python.exe -c "
import time
time.sleep(3600)
" & TARGET=$!

sudo ./python.exe -m profiling.sampling attach --binary -r 1000khz -d 300 -o /tmp/rle.bin $TARGET &
sleep 2; PROF=$(pgrep -fn "profiling.sampling attach")
for i in $(seq 5); do printf "t=%2dmin  RSS=%d MB\n" $i $(($(ps -o rss= -p $PROF|tr -d ' ')/1024)); sleep 60; done
[1] 65625
[2] 65626
t= 1min  RSS=32 MB
t= 2min  RSS=33 MB
t= 3min  RSS=33 MB
t= 4min  RSS=33 MB
t= 5min  RSS=33 MB
Captured 99,316,092 samples in 300.00 seconds
Sample rate: 331,053.64 samples/sec
Error rate: 0.00
  Binary Encoding:
    Records:          12,131
      RLE repeat:     12,130 (100.0%) [99,308,159 samples]
      Full stack:     1 (0.0%)
      Suffix match:   0 (0.0%)
      Pop-push:       0 (0.0%)
  Frame Efficiency:
    Frames written:   1
    Frames saved:     99,308,159 (100.0%)
    Bytes (pre-zstd): 189.6 MB
Warning: missed 200683909 samples from the expected total of 300000001 (66.89%)
Binary profile written to /tmp/rle.bin (99316092 samples)

[2]  + done       sudo ./python.exe -m profiling.sampling attach --binary -r 1000khz -d 300 -o 
2026-06-24T15:47:52.516465000+0200 maurycy@gimel /Users/maurycy/work/cpython (rle-overlow-fixed ee78d43+) % ./python.exe -VV
Python 3.16.0a0 (heads/main-dirty:ee78d4323c1, Jun 24 2026, 12:32:26) [Clang 21.0.0 (clang-2100.1.1.101)]