I have download a golang package from github. it is in middle size. when compiling it from source, my computor gets slow down for i have more than one golang compile process and it takes much of the cpu.
how does golang make it to do concurrent compile? any params to turn the number of cpu it use when compile?
Go is using a lot of CPU because it's trying to build as fast as possible, like any other compiler. It may also be because you're using a package that is using cgo, which can drastically increase compiling times as compiling medium to large C libraries is often quite intensive.
You can control the number of processes Go is using by setting the GOMAXPROCS environment variable. Such as GOMAXPROCS=1 go get ... to limit Go to only use 1 process (and thus only 1 CPU core). This however does not affect the number of processes used by external compilers that cgo may invoke.
If you need further CPU control, on Unix based systems you can use the nice command to change the priority of processes such that other programs have higher CPU priority, making your computer less sluggish.