This tells the OS that your download process must run on cores 0-7 (or 0-15), preventing the scheduler from offloading it to a single little core.
: A common file manager used to rename, move, or execute system tweaks and scripts. extra quality download max all cpu core no root
aria2c -x16 -s16 -k5M "URL"
taskset -c 0-7 aria2c -x16 -s16 "URL"