AOSP build time on Ryzen 9 3900x

Probably somebody thinks to make his own build machine for Android. In the end of 2019 I bought next desktop PC:

Hardware:
AMD Ryzen 9 3900X
Gigabyte X570 Aorus Elite
HyperX Predator 2x16GB DDR4 PC4-25600 HX432C16PB3K2/32
Gigabyte Aorus NVMe Gen4 1TB GP-ASM2NE6100TTTD
Palit GeForce GT 1030 2GB DDR4

OS
Ubuntu 18.04.3

And here is some of build time logs

RAM: 2400mhz
make -j12
#### build completed successfully (54:13 (mm:ss)) ####

RAM: 2400mhz
-j18
#### build completed successfully (46:52 (mm:ss)) ####

RAM: 2400mhz
make -j24
#### build completed successfully (43:14 (mm:ss)) ####

RAM: 3200mhz
-j24
#### build completed successfully (41:55 (mm:ss)) ####

branch with tag
android-10.0.0_r_xx (don't remember android tag name))

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