CPU: AMD Ryzen 9 5900HX with Radeon Graphics

```
CPU: AMD Ryzen 9 5900HX with Radeon Graphics
Cores: 16
Freq: 3293.699 MHz
Ram: 7.5Gi
Disk: Msft Virtual Disk
OS: Linux (5.10.16.3-microsoft-standard-WSL2)
Cc: gcc (Debian 10.2.1-6) 10.2.1 20210110
103.607 seconds: ./build_all.sh CC=gcc
34.890 seconds: ./koch temp -d:release --cc:gcc
```