number of goroutine for decoding with regard to go-osmpbf

[kkdd]

When using go-osmpbf (https://github.com/qedus/osmpbf),
fmp.Printf("number of goroutines for decoding = %d", runtime.GOMAXPROCS(-1))
would print helpful information. I suspect it to be one.

Note that it is used in the code as follows:
err = d.Start(runtime.GOMAXPROCS(-1)) // use several goroutines for faster decoding

[missinglink]

hey @kkdd this is being set to -1 like you said, which is why it's the fastest from the test results, what makes you think it's still bound to a single core?

[kkdd]

I finally understand Goroutine's threads as follows:

ncpu := 2  // specifying the number of CPU which Golang uses
runtime.GOMAXPROCS(ncpu)  // Note that ncpu == runtime.GOMAXPROCS(-1)
err = d.Start(ncpu)  // specifying the number of Goroutine's threads