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Lag in "File View"
Open, Needs Triage by DeveloperPublic


System Information
Operating system: Windows-10-10.0.16299 64 Bits
Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.15

Blender Version
Broken: version: 2.81 (sub 8), branch: master, commit date: 2019-09-05 02:56, hash: rB6fc6f2504dfd

Short description of error
"File View" window noticeably lags when moved around. After some time it stops lagging and becomes smooth.

Exact steps for others to reproduce the error

  • Start new session of Blender
  • "File" > "Open" (or "ctrl+o")
  • Move the "Blender File View" around rather quickly.

Lagging is quite noticeable, as if something was loading to memory, but after some time it stops and becomes buttery smooth.

Edit: Tested on a weaker machine:
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 750 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.15

The performance drop is more noticeable and doesn't seem to get better over time.
Also, if you move main window around, while file menu is open you'll notice the same issue. If you minimize the file menu and then move main window around, it performs smooth.