go - How the slice is enlarged by append? Is the capacity always doubled?

Question

When append a slice, the slice may be enlarged if necessary. Because the spec doesn't specify the algorithm, I am curious about it.

I try to find the append implementation in the Go source code, but can't find it.

Could anyone explain the specified algorithm for enlarging slice? Is the capacity always doubled? or Could anyone provide the source code position of append? I can check it myself.

Answer 1

Waitting for answers