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  1. ROOT
  2. ROOT-10860

IPython response gets very slow

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Details

    • Bug
    • Status: Closed (View Workflow)
    • High
    • Resolution: Clarified
    • 6.20/06
    • None
    • PyROOT
    • None

    Description

      Just typing the following commands make the response of the IPython session very slow.

      $ ipython
      In [0]: import ROOT
      In [1]: g = ROOT.TGraph()

      Once it is triggered, the terminal is not updated when typing keys many times quickly.

      You can see what I mean from the screen capture movie.

      https://www.dropbox.com/s/rpvruzctsa8dkg8/ipython.mov?dl=0

      The left terminal (Python PID = 446399) calls the TGraph constructor, and the response gets very slow at around 00:45, where "1111…111" is not shown in the terminal while the 1 key is kept pressed.

      At around 00:56, I repeated typing the 1 and enter keys, but the output behaviors are very different between the left and right windows.

      I confirmed that this unexpected behavior also happens on an almost clean virtual machine 10.15.5, on which only Python 3, IPython, and CMake via Homebrew are explicitly installed.

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            eguiraud Enrico Guiraud
            5634f7f540ef3ba1605e oxon@mac.com
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            Dates

              Created:
              Updated:
              Resolved: