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Warning, Regression, slow vertex selection
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Description

System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: AMD Radeon HD 7600M Series ATI Technologies Inc. 4.5.13399 Core Profile Context 0

Blender Version
Broken: version: 2.81 (sub 14), branch: master, commit date: 2019-10-08 22:16, hash: rB0812949bbc3d
blender-2.81- a856c5eccffb -windows64 already broken
Worked:
blender-2.81- 54a9649e2636 -windows64

Short description of error
vertex selection became terribly slow, worked well in the previous build.

Exact steps for others to reproduce the error

Event Timeline

noki paike (amonpaike) updated the task description. (Show Details)
Germano Cavalcante (mano-wii) lowered the priority of this task from Needs Triage by Developer to Confirmed, High.Wed, Oct 9, 1:53 PM

just some more info on what I found,
before I was able to select vertices quite smooth even in render eevee mode ..
now it is practically impossible.

just another useful info, I re-checked for security on that build that worked well, that test-bug T70302 on my gpu didn't crash, and it still doesn't crash, maybe that bug is related only on the gpu nvidia or gpu that have no workaround.
Someone who has a Radeon GPU with recent drivers should do a check.