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-module(httpd_util_rfc1123_date). | |
-compile(export_all). | |
run() -> | |
CountPerProcess = 100, | |
L = erlang:localtime(), | |
io:format("Arity 0:"), | |
bmp0(fun() -> httpd_util:rfc1123_date() end, CountPerProcess, 10), | |
io:nl(), | |
io:format("Arity 1:"), | |
bmp0(fun() -> httpd_util:rfc1123_date(L) end, CountPerProcess, 10), | |
ok. | |
bmp0(Fun, CountPerProcess, Processes) -> | |
Self = self(), | |
ListOfPid = [spawn(fun() -> bmp_process(Self, Fun, CountPerProcess) end) || | |
_ <- lists:seq(1, Processes)], | |
[Pid ! start || Pid <- ListOfPid], | |
ListOfUSec = [receive {_, USec, _Count} -> USec end || _Pid <- ListOfPid], | |
%% ?debugVal(ListOfUSec), | |
io:nl(), | |
io:format("============ Turn around time ================~n"), | |
io:format("Minimum~n"), | |
bm_format(lists:min(ListOfUSec), CountPerProcess, msec), | |
io:format("Maximum~n"), | |
bm_format(lists:max(ListOfUSec), CountPerProcess, msec), | |
TotalUSec = lists:sum(ListOfUSec), | |
io:format("Average~n"), | |
bm_format(TotalUSec div Processes, CountPerProcess, msec), | |
io:format("============ Throughput ======================~n"), | |
io:format("~f [ops/msec]~n", [CountPerProcess * Processes / (TotalUSec / Processes / 1000)]), | |
io:nl(), | |
ok. | |
bmp_process(From, Fun, Count) -> | |
receive | |
start -> | |
{USec, _Value} = timer:tc(fun() -> bm0(Fun, Count) end), | |
From ! {self(), USec, Count} | |
end. | |
bm0(_Fun, 0) -> | |
ok; | |
bm0(Fun, Count) -> | |
Fun(), | |
bm0(Fun, Count - 1). | |
bm_format(USec, Count) -> | |
%% ?debugVal(USec), | |
io:nl(), | |
bm_format(USec, Count, both). | |
bm_format(USec, Count, usec) -> | |
io:format("total: ~B [usec] / ~B [ops]~n", [USec, Count]), | |
io:format("single: ~f [usec/op]~n", [USec / Count]); | |
bm_format(USec, Count, msec) -> | |
io:format("total: ~f [msec] / ~B [ops]~n", [USec / 1000, Count]), | |
io:format("single: ~f [msec/op]~n", [USec / 1000 / Count]); | |
bm_format(USec, Count, both) -> | |
io:format("============= [in micro seconds] =============~n"), | |
bm_format(USec, Count, usec), | |
io:format("============= [in milli seconds] =============~n"), | |
bm_format(USec, Count, msec), | |
io:format("==============================================~n"). |
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