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very slow playback if activated thee Auto normalization
Closed, ResolvedPublicBUG

Description

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: AMD FirePro D700 (FireGL V) ATI Technologies Inc. 4.5.13399 Core Profile Context FireGL 15.200.1060.0

Blender Version
Broken: version: 2.83 (sub 9), branch: master, commit date: 2020-03-18 23:49, hash: rBf70241deba0e
Worked: (newest version of Blender that worked as expected)

Short description of error
if I

activate the "Auto normalization" button, the 3d view goes very slow, this issue does not exist in blender 2.80, you could test it by using the blend file
by the way the issue appear only in the long time f-curves, as long as the f-curve is small the issue will be small but in long time it makes the speed gose down from 60 fps to 7 fps as shown in the blend file

Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]

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