**System Information**
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Graphics card: GeForce GTX 760M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 425.31
**Blender Version**
Broken: version: 3.1.2, branch: master, commit date: 2022-03-31 17:40, hash: `rBcc66d1020c3b`
Worked: version: 2.93.1, branch: master, commit date: 2021-06-22 05:57, hash: `rB1b8d33b18c2f`
This issue here is also caused by {rB7e712b2d6a0d}, same as {T97375}.
**Short description of error**
Setting `bpy.data.node_groups["NodeGroup"].inputs[0].default_value` is 29 times slower in 3.1.2 comparing to 2.93.1. It depends on a number of `bpy.types.NodeGroupInput` present. With a tree with only `NodeGroupInput` nodes the difference is more than 200 times.
**Exact steps for others to reproduce the error**
Open the file and run the test script.
{F13123166}