[lsllc]

There's a bit of a write-up here:

https://www.cockroachlabs.com/blog/the-cost-and-complexity-o...

In their benchmark, calling a `func() {}` in Go vs a `void foo() {}` in C (via CGo) is almost 100x faster.

  $ go test -bench . -gcflags '-l'    # disable inlining for fairness
  BenchmarkCGO-8  10000000              171 ns/op
  BenchmarkGo-8   2000000000           1.83 ns/op

EDIT: And then you still have the extra overhead when using `C.CString` and `C.GoBytes` if you're passing those sorts of arguments to C.

[_ph_]

But if the called function takes more than 200ns to execute, the overhead is less than 50%. Which probably is true for most relevant functions in an API