what is the GOMAXPROCS default value

Question

Is it guaranteed that GOMAXPROCS is set to 1 when the environment variable of the same name is not set?

This code shows the value:

package main

import (         


        

Answer 1

As Go 1.5 Release Notes says

By default, Go programs run with GOMAXPROCS set to the number of cores available; in prior releases it defaulted to 1.

So starting from Go 1.5, the default value should be the number of cores.