WSL2 Performance Bug?

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Intro

During my testing of the 9900K I noticed an oddity. It was pure chance that I ran into this bug. I was messing around with Windows Subsystem for Linux which I already had enabled on my Windows 10 install. I got fed up with it for one reason or another which isn’t relevant and removed it. The next day when I continued with my frequency stepping tests, I saw lower clock speeds (with WSL2 related features disabled) beating higher clock speeds (that had WSL2 related features enabled) in AIDA64 and other tests I was running.

Setup

Test System

For my test system I’m using the same hardware as in my 9900K review:

Hardware Provided by Intel
- Intel Core i9-9900K
- Noctua NH-D15
- ASRock Z390 Taichi
- G.Skill Trident Z RGB F4-3466C16D-16GTZR
- Samsung 970 EVO Plus 250GB NVMe
- Fractal Design Define S2
- Seasonic 850w Focus Gold
My Personal Hardware
- EVGA RTX 2080Ti XC Black
- PNY CS1311 960GB SSD
- SanDisk Ultra II 480GB SSD

Software

For the quick tests as of now I’m using AIDA64 Extreme Edition version 6.00.5100 along with Windows 10 Pro Insider Fast Ring 18963.rs_prerelease.190814-0221. When WSL2 is enabled nothing is actually installed for it, as in, I don’t have a Linux distro set up or running or anything. The only thing that changed was these Windows 10 features being enabled or not. All testing is done with no internet access and I also wait for a completely idle CPU usage.