The time required to download toolchain for esp32 is about 1 hour and 40 minutes.
Is it normal?
When I installed a toolchain for ESP8266, it took less than 10 minutes.
I installed HAOS on raspberry PI 3B+ with Samsung bar plus 256 GB USB.
Although the booting medium is the USB drive, it is faster than other USB drives.
According to benchmark using CrystalDiskMark, read/write for RAND4K was around 20MB/s.
So, I believe that the USB drive is not a bottleneck of this problem.
I did not include sensors for monitoring system, but settings/system/hardware menu shows CPU and RAM utilization.
CPU ram utilizations are 6% and 0.7GB/1GB, respectively.