On heavy scenes, the function `get_graph_keyframe_extents`
takes up a considerable amount of the time (~50%) it takes to draw the Graph Editor.
This function is called to set the `View2D` extents which makes the scrollbars work properly.
I'd argue that level of precision isn't needed just to display scrollbars.
Passing the flag as `false` speeds up the drawing code by 22%.
Timings for `graph_main_region_draw`
| Before | After |
| - | - |
| 32ms | 25ms |
Timings for `get_graph_keyframe_extents`
| Before | After |
| - | - |
| ~16ms | ~8ms |
Test file used
https://download.blender.org/ftp/sybren/animation-rigging/heavy_mocap_test.blend
Pull Request: https://projects.blender.org/blender/blender/pulls/120519
0157fede80