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-rw-r--r--lib/stdlib/test/rand_SUITE.erl101
1 files changed, 80 insertions, 21 deletions
diff --git a/lib/stdlib/test/rand_SUITE.erl b/lib/stdlib/test/rand_SUITE.erl
index 36bc283aec..c264a65521 100644
--- a/lib/stdlib/test/rand_SUITE.erl
+++ b/lib/stdlib/test/rand_SUITE.erl
@@ -485,12 +485,12 @@ do_measure(_Config) ->
{int, rand:uniform_s(Range, State)}
end) || Algo <- Algos],
%%
- ct:pal("~nRNG uniform integer 2^(N-1) performance~n",[]),
- RangeTwoPowFun = fun (State) -> quart_range(State) bsl 1 end,
+ ct:pal("~nRNG uniform integer half range performance~n",[]),
+ HalfRangeFun = fun (State) -> half_range(State) end,
TMark2 =
measure_1(
random,
- RangeTwoPowFun,
+ HalfRangeFun,
undefined,
fun (Range, State) ->
{int, random:uniform_s(Range, State)}
@@ -498,18 +498,18 @@ do_measure(_Config) ->
_ =
[measure_1(
Algo,
- RangeTwoPowFun,
+ HalfRangeFun,
TMark2,
fun (Range, State) ->
{int, rand:uniform_s(Range, State)}
end) || Algo <- Algos],
%%
- ct:pal("~nRNG uniform integer 3*2^(N-2)+1 performance~n",[]),
- RangeLargeFun = fun (State) -> 3 * quart_range(State) + 1 end,
+ ct:pal("~nRNG uniform integer half range + 1 performance~n",[]),
+ HalfRangePlus1Fun = fun (State) -> half_range(State) + 1 end,
TMark3 =
measure_1(
random,
- RangeLargeFun,
+ HalfRangePlus1Fun,
undefined,
fun (Range, State) ->
{int, random:uniform_s(Range, State)}
@@ -517,17 +517,18 @@ do_measure(_Config) ->
_ =
[measure_1(
Algo,
- RangeLargeFun,
+ HalfRangePlus1Fun,
TMark3,
fun (Range, State) ->
{int, rand:uniform_s(Range, State)}
end) || Algo <- Algos],
%%
- ct:pal("~nRNG uniform integer 2^128 performance~n",[]),
+ ct:pal("~nRNG uniform integer full range - 1 performance~n",[]),
+ FullRangeMinus1Fun = fun (State) -> (half_range(State) bsl 1) - 1 end,
TMark4 =
measure_1(
random,
- fun (_) -> 1 bsl 128 end,
+ FullRangeMinus1Fun,
undefined,
fun (Range, State) ->
{int, random:uniform_s(Range, State)}
@@ -535,17 +536,18 @@ do_measure(_Config) ->
_ =
[measure_1(
Algo,
- fun (_) -> 1 bsl 128 end,
+ FullRangeMinus1Fun,
TMark4,
fun (Range, State) ->
{int, rand:uniform_s(Range, State)}
end) || Algo <- Algos],
%%
- ct:pal("~nRNG uniform integer 2^128 + 1 performance~n",[]),
+ ct:pal("~nRNG uniform integer full range performance~n",[]),
+ FullRangeFun = fun (State) -> half_range(State) bsl 1 end,
TMark5 =
measure_1(
random,
- fun (_) -> (1 bsl 128) + 1 end,
+ FullRangeFun,
undefined,
fun (Range, State) ->
{int, random:uniform_s(Range, State)}
@@ -553,16 +555,73 @@ do_measure(_Config) ->
_ =
[measure_1(
Algo,
- fun (_) -> (1 bsl 128) + 1 end,
+ FullRangeFun,
TMark5,
fun (Range, State) ->
{int, rand:uniform_s(Range, State)}
end) || Algo <- Algos],
%%
- ct:pal("~nRNG uniform float performance~n",[]),
+ ct:pal("~nRNG uniform integer full range + 1 performance~n",[]),
+ FullRangePlus1Fun = fun (State) -> (half_range(State) bsl 1) + 1 end,
TMark6 =
measure_1(
random,
+ FullRangePlus1Fun,
+ undefined,
+ fun (Range, State) ->
+ {int, random:uniform_s(Range, State)}
+ end),
+ _ =
+ [measure_1(
+ Algo,
+ FullRangePlus1Fun,
+ TMark6,
+ fun (Range, State) ->
+ {int, rand:uniform_s(Range, State)}
+ end) || Algo <- Algos],
+ %%
+ ct:pal("~nRNG uniform integer double range performance~n",[]),
+ DoubleRangeFun = fun (State) -> half_range(State) bsl 2 end,
+ TMark7 =
+ measure_1(
+ random,
+ DoubleRangeFun,
+ undefined,
+ fun (Range, State) ->
+ {int, random:uniform_s(Range, State)}
+ end),
+ _ =
+ [measure_1(
+ Algo,
+ DoubleRangeFun,
+ TMark7,
+ fun (Range, State) ->
+ {int, rand:uniform_s(Range, State)}
+ end) || Algo <- Algos],
+ %%
+ ct:pal("~nRNG uniform integer double range + 1 performance~n",[]),
+ DoubleRangePlus1Fun = fun (State) -> (half_range(State) bsl 2) + 1 end,
+ TMark8 =
+ measure_1(
+ random,
+ DoubleRangePlus1Fun,
+ undefined,
+ fun (Range, State) ->
+ {int, random:uniform_s(Range, State)}
+ end),
+ _ =
+ [measure_1(
+ Algo,
+ DoubleRangePlus1Fun,
+ TMark8,
+ fun (Range, State) ->
+ {int, rand:uniform_s(Range, State)}
+ end) || Algo <- Algos],
+ %%
+ ct:pal("~nRNG uniform float performance~n",[]),
+ TMark9 =
+ measure_1(
+ random,
fun (_) -> 0 end,
undefined,
fun (_, State) ->
@@ -572,7 +631,7 @@ do_measure(_Config) ->
[measure_1(
Algo,
fun (_) -> 0 end,
- TMark6,
+ TMark9,
fun (_, State) ->
{uniform, rand:uniform_s(State)}
end) || Algo <- Algos],
@@ -582,7 +641,7 @@ do_measure(_Config) ->
_ = [measure_1(
Algo,
fun (_) -> 0 end,
- TMark6,
+ TMark9,
fun (_, State) ->
{normal, rand:normal_s(State)}
end) || Algo <- Algos],
@@ -1043,7 +1102,7 @@ range({#{max:=Max}, _}) -> Max; %% Old incorrect range
range({_, _, _}) -> 51. % random
-quart_range({#{bits:=Bits}, _}) -> 1 bsl (Bits - 2);
-quart_range({#{max:=Max}, _}) -> (Max bsr 2) + 1;
-quart_range({#{}, _}) -> 1 bsl 62; % crypto
-quart_range({_, _, _}) -> 1 bsl 49. % random
+half_range({#{bits:=Bits}, _}) -> 1 bsl (Bits - 1);
+half_range({#{max:=Max}, _}) -> (Max bsr 1) + 1;
+half_range({#{}, _}) -> 1 bsl 63; % crypto
+half_range({_, _, _}) -> 1 bsl 50. % random