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  1. Qt
  2. QTBUG-79142

Maya 2020 PR109 performance degrades due to lengthy memory operations caused by Qt when using a dual-display setup on macOS.

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Details

    • Bug
    • Resolution: Unresolved
    • P2: Important
    • None
    • 5.12.4
    • None
    • macOS Catalina Beta 9 or newer.
    • macOS

    Description

      Maya 2020 PR109 performance degrades due to lengthy memory operations caused by Qt when using a dual-display setup on macOS.
       
      For Maya 2020 PR109:

      • Single display setups running on Catalina Beta 9 or newer work well. 
      • Dual display setups on Catalina Beta 9 or newer show the issue talked about. The frames are not smooth and jitter.
      • When using the Pro Display XDR in a dual display setup the problem becomes a lot more severe and Maya is deemed unusable.
      • Both single and dual display setups on latest Mojave show the same or a simlar issue. I have not verified the callstack is the same however.
         

      • STEPS TO REPRODUCE
      1) Attach two displays to machine
      2) Launch Maya 2020 beta
      3) Create an object
      4) Use 3-button mouse to pan in viewport (middle mouse click and drag to pan)

      See attached files for callstacks.

      Attachments

        1. callstack1.txt
          3 kB
          Abraham Soethoudt
        2. callstack2.txt
          3 kB
          Abraham Soethoudt
        3. callstack3.txt
          3 kB
          Abraham Soethoudt
        4. image001.png
          255 kB
          Abraham Soethoudt
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            Unassigned Unassigned
            jsoethoudt Abraham Soethoudt
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            Dates

              Created:
              Updated:

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