Updated
Maybe you need this command.
Needs["Benchmarking`"]
BenchmarkReport[]
I use Gentoo calculate Linux recently, it is faster then previous operation system.
Original
CPU: Intel i5-1035G4 (8) @ 3.700GHz
GPU: Intel Iris Plus Graphics G4
Memory: 2369MiB / 15773MiB (15%)
OS: ArcoLinux
DE: Plasma 5.20.3
{"MachineName" -> "cvgmt-950qcg",
"System" -> "Linux x86 (64-bit)", "BenchmarkName" ->
"WolframMark", "FullVersionNumber" -> "12.1.1",
"Date" -> "November 18, 2020", "BenchmarkResult" -> 3.22,
"TotalTime" -> 4.299, "Results" -> {{"Data Fitting", 0.22},
{"Digits of Pi", 0.312}, {"Discrete Fourier Transform",
0.357}, {"Eigenvalues of a Matrix", 0.303},
{"Elementary Functions", 0.185}, {"Gamma Function", 0.46},
{"Large Integer Multiplication", 0.371},
{"Matrix Arithmetic", 0.12}, {"Matrix Multiplication",
0.278}, {"Matrix Transpose", 0.324},
{"Numerical Integration", 0.449}, {"Polynomial Expansion",
0.059}, {"Random Number Sort", 0.181},
{"Singular Value Decomposition", 0.354},
{"Solving a Linear System", 0.326}}}