Guid.CreateNew() has regressed a lot on macOS #50897
Description
It looks like Guid.CreateNew() has become few times slower compared to 5.0. This regression is specific to macOS, Linux is not affected.
Repro
git clone https://github.com/dotnet/performance.git
python3 ./performance/scripts/benchmarks_ci.py -f net5.0 net6.0 --filter 'System.Tests.Perf_Guid.NewGuid`Full data from the most recent comparison
Details
| Result | Base | Diff | Ratio | Alloc Delta | Modality | Operating System | Bit | Processor Name | Base V | Diff V |
|---|---|---|---|---|---|---|---|---|---|---|
| Same | 66.26 | 67.29 | 0.98 | +0 | Windows 10.0.19042 | X64 | AMD Ryzen Threadripper 2990WX | 5.0.421.11614 | 6.0.21.16201 | |
| Same | 51.51 | 49.42 | 1.04 | +0 | Windows 10.0.21337 | X64 | AMD Ryzen 9 3900X | 5.0.421.11614 | 6.0.21.16701 | |
| Same | 53.08 | 51.65 | 1.03 | +0 | Windows 10.0.21337 | X64 | AMD Ryzen Threadripper 3990X | 5.0.421.11614 | 6.0.21.16701 | |
| Same | 79.78 | 79.45 | 1.00 | +0 | Windows 10.0.18363.1440 | X64 | Intel Xeon CPU E5-1650 v4 3.60GHz | 5.0.421.11614 | 6.0.21.16201 | |
| Slower | 357.46 | 688.03 | 0.52 | +0 | several? | Windows 10.0.21337 | X64 | Intel Core i5-4300U CPU 1.90GHz (Haswell) | 5.0.421.11614 | 6.0.21.16701 |
| Same | 67.36 | 68.43 | 0.98 | +0 | Windows 10.0.19042 | X64 | Intel Core i7-6700 CPU 3.40GHz (Skylake) | 5.0.421.11614 | 6.0.21.16201 | |
| Same | 67.60 | 68.24 | 0.99 | +0 | Windows 10.0.19042 | X64 | Intel Core i7-7700 CPU 3.60GHz (Kaby Lake) | 5.0.421.11614 | 6.0.21.16201 | |
| Same | 78.69 | 79.37 | 0.99 | +0 | Windows 10.0.19042 | X64 | Intel Core i7-8650U CPU 1.90GHz (Kaby Lake R) | 5.0.421.11614 | 6.0.21.16408 | |
| Same | 59.24 | 59.51 | 1.00 | +0 | Windows 10.0.19042 | X64 | Intel Core i7-8700 CPU 3.20GHz (Coffee Lake) | 5.0.421.11614 | 6.0.21.16201 | |
| Same | 60.07 | 59.47 | 1.01 | +0 | Windows 10.0.19042 | X64 | Intel Core i7-8700 CPU 3.20GHz (Coffee Lake) | 5.0.421.11614 | 6.0.21.16408 | |
| Same | 245.99 | 244.95 | 1.00 | +0 | Windows 10.0.19042 | X64 | Intel Atom x7-Z8700 CPU 1.60GHz | 5.0.421.11614 | 6.0.21.16309 | |
| Same | 745.46 | 713.66 | 1.04 | +0 | ubuntu 18.04 | X64 | Intel Xeon CPU E5-1650 v4 3.60GHz | 5.0.421.11614 | 6.0.21.16309 | |
| Same | 1912.05 | 1873.51 | 1.02 | +0 | alpine 3.11 | X64 | Intel Core i7-7700 CPU 3.60GHz (Kaby Lake) | 5.0.421.11614 | 6.0.21.16601 | |
| Same | 820.20 | 823.64 | 1.00 | +0 | ubuntu 16.04 | Arm64 | Unknown processor | 5.0.421.11614 | 6.0.21.17806 | |
| Same | 825.06 | 779.20 | 1.06 | +0 | ubuntu 16.04 | Arm64 | Unknown processor | 5.0.421.11614 | 6.0.21.17806 | |
| Same | 94.51 | 90.38 | 1.05 | +0 | Windows 10.0.19042 | Arm64 | Microsoft SQ1 3.0 GHz | 5.0.421.11614 | 6.0.21.16309 | |
| Same | 94.68 | 92.58 | 1.02 | +0 | Windows 10.0.19042 | Arm64 | Microsoft SQ1 3.0 GHz | 5.0.421.11614 | 6.0.21.16201 | |
| Same | 249.69 | 247.84 | 1.01 | +0 | Windows 10.0.18363.1440 | X86 | Intel Xeon CPU E5-1650 v4 3.60GHz | 5.0.421.11614 | 6.0.21.16701 | |
| Same | 248.07 | 231.92 | 1.07 | +0 | Windows 10.0.19042.867 | Arm | Microsoft SQ1 3.0 GHz | 5.0.421.11614 | 6.0.21.17905 | |
| Slower | 116.40 | 874.96 | 0.13 | +0 | macOS 11.2 | X64 | Intel Core i5-4278U CPU 2.60GHz (Haswell) | 5.0.421.11614 | 6.0.21.16408 | |
| Slower | 95.66 | 717.08 | 0.13 | +0 | macOS 11.2.2 | X64 | Intel Core i7-4870HQ CPU 2.50GHz (Haswell) | 5.0.421.11614 | 6.0.21.16601 | |
| Slower | 216.78 | 994.44 | 0.22 | +0 | macOS Mojave 10.14.5 | X64 | Intel Core i7-5557U CPU 3.10GHz (Broadwell) | 5.0.421.11614 | 6.0.21.16309 |