Skip to content

@legoscia /timestamp_vs_now.erl forked from manuel-rubio/timestamp_vs_now.erl
Last active

Embed URL

HTTPS clone URL

Subversion checkout URL

You can clone with
or
.
Download ZIP
#!/usr/bin/env escript
-mode(compile).
epoch() ->
{Mega,Sec,Mili} = os:timestamp(),
(Mega * 1000000) + Sec + (Mili / 1000000).
measure(F) ->
Ini = epoch(),
F(),
epoch() - Ini.
main(_Args) ->
Times = lists:seq(1,1000000),
Test1 = fun() -> [ os:timestamp() || _ <- Times ] end,
Test2 = fun() -> [ now() || _ <- Times ] end,
io:format("os:timestamp = ~5.2f ~5.2f ~5.2f~n", [
measure(Test1), measure(Test1), measure(Test1)
]),
io:format("erlang:now = ~5.2f ~5.2f ~5.2f~n", [
measure(Test2), measure(Test2), measure(Test2)
]),
0.
@manuel-rubio

Good point!, thanks Magnus. Looks like the interpreted code is slower than compiled. Is It due to hipe?

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Something went wrong with that request. Please try again.