func deepStack(depth int, b *testing.B) stack.Trace {
if depth > 0 {
return deepStack(depth-1, b)
}
b.StartTimer()
s := stack.Callers()
b.StopTimer()
return s
}
func BenchmarkCallers(b *testing.B) {
for i := 0; i < b.N; i++ {
stack.Callers()
}
}