Fix R18 erlang:now() deprecation warning

[mkurkov]

HI, here is simple fix to remove R18 warning about deprecated erlang:now().

[hmmr]

+1

[zyro]

+1

[novabyte]

+1

[pichi]

What is preventing pulling this request? It's half of year for two lines fix which effect doesn't escape from one function. It's ridiculous.

[hmmr]

@pichi Thanks for bumping this PR. There's no active development happening in erlang_js these days, and it keeps passing under radar while we are still stuck at OTP-16.

@mkurkov Can you rewrite it to use timer:tc/1, which seems to be a little more to the point? Like so:

{Elapsed, _ } = timer:tc(fun do_calls/2, [Ctx, Count]),
Elapsed / Count.

[pichi]

@hmmr You are right. This is a way better solution.
See #55

[JeetKunDoug]

Will close this and get #55 merged. Thanks, and sorry for the delay in looking at the PR.