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Install

pip install scalene

Run (on CLI)

$ scalene <yourapp.py>

Example output

If you run the mlp.py

$ scalene mlp.py

You may see something like,

scalene-1

Features

Here are some of the cool features of Scalene. Most of them are self-explanatory and can be gauged from the screenshot above,

  • Lines or functions: Reports information both for entire functions and for every independent code line
  • Threads: It supports Python threads.
  • Multiprocessing: supports use of the multiprocessing library
  • Python vs. C time: Scalene breaks out time spent in Python vs. native code (e.g., libraries)
  • System time: It distinguishes system time (e.g., sleeping or performing I/O operations)
  • GPU: It also can report the time spent on an NVIDIA GPU (if present)
  • Copy volume: It reports MBs of data being copied per second 
  • Detects leaks: Scalene can automatically pinpoint lines responsible for likely memory leaks!