diff --git a/src/testCase/tc.erl b/src/testCase/tc.erl
new file mode 100644
index 0000000..28d9e12
--- /dev/null
+++ b/src/testCase/tc.erl
@@ -0,0 +1,137 @@
+-module(tc).
+
+-compile([export_all, nowarn_unused_function, nowarn_unused_vars, nowarn_export_all]).
+
+%% 单进程循环测试：LoopTimes是循环次数
+%% tc:t(Module, Function, ArgsList, LoopTimes).
+%% 多进程并发测试：SpawnProcessesCount是并发的进程数
+%% tc:ct(Module, Function, ArgsList, SpawnProcessesCount).
+
+t1() ->
+   [ X || X <- lists:seq(1, 5000) ].
+
+t2() ->
+   t2(lists:seq(1, 5000)).
+t2([H|T]) ->
+   H,
+   t2(T);
+t2([]) ->
+   ok.
+
+tc(M, F, A) ->
+   {Microsecond, _} = timer:tc (M, F, A),
+   Microsecond.
+
+distribution(List, Aver) ->
+   distribution(List, Aver, 0, 0).
+distribution([H|T], Aver, Greater, Less) ->
+   case H > Aver of
+      true ->
+         distribution(T, Aver, Greater + 1, Less);
+      false ->
+         distribution(T, Aver, Greater, Less + 1)
+   end;
+distribution([], _Aver, Greater, Less) ->
+   {Greater, Less}.
+
+%% ===================================================================
+%% test: one process test N times
+%% ===================================================================
+
+t(M, F, A, N) ->
+   {Max, Min, Sum, Aver, Greater, Less} = loop ({M, F, A}, N),
+   io:format ("=====================~n"),
+   io:format ("execute [~p] times of {~p, ~p, ~p}:~n", [N, M, F, A]),
+   io:format ("Maximum: ~p(μs)\t~p(s)~n", [Max, Max / 1000000]),
+   io:format ("Minimum: ~p(μs)\t~p(s)~n", [Min, Min / 1000000]),
+   io:format ("Sum: ~p(μs)\t~p(s)~n", [Sum, Sum / 1000000]),
+   io:format ("Average: ~p(μs)\t~p(s)~n", [Aver, Aver / 1000000]),
+   io:format ("Greater: ~p~nLess: ~p~n", [Greater, Less]),
+   io:format ("=====================~n").
+
+
+loop({M, F, A}, N) ->
+   loop ({M, F, A}, N, 1, 0, 0, 0, []).
+
+loop({M, F, A}, N, I, Max, Min, Sum, List) when N >= I ->
+   Microsecond = tc (M, F, A),
+   NewSum = Sum + Microsecond,
+   if
+      Max == 0 ->
+         NewMax = NewMin = Microsecond;
+      Max < Microsecond ->
+         NewMax = Microsecond,
+         NewMin = Min;
+      Min > Microsecond ->
+         NewMax = Max,
+         NewMin = Microsecond;
+      true ->
+         NewMax = Max,
+         NewMin = Min
+   end,
+   loop ({M, F, A}, N, I + 1, NewMax, NewMin, NewSum, [Microsecond|List]);
+loop({_M, _F, _A}, N, _I, Max, Min, Sum, List) ->
+   Aver = Sum / N,
+   {Greater, Less} = distribution(List, Aver),
+   {Max, Min, Sum, Aver, Greater, Less}.
+
+%% ===================================================================
+%% Concurrency test: N processes each test one time
+%% ===================================================================
+
+ct(M, F, A, N) ->
+   {Max, Min, Sum, Aver, Greater, Less} = cloop ({M, F, A}, N),
+   io:format ("=====================~n"),
+   io:format ("spawn [~p] processes of {~p, ~p, ~p}:~n", [N, M, F, A]),
+   io:format ("Maximum: ~p(μs)\t~p(s)~n", [Max, Max / 1000000]),
+   io:format ("Minimum: ~p(μs)\t~p(s)~n", [Min, Min / 1000000]),
+   io:format ("Sum: ~p(μs)\t~p(s)~n", [Sum, Sum / 1000000]),
+   io:format ("Average: ~p(μs)\t~p(s)~n", [Aver, Aver / 1000000]),
+   io:format ("Greater: ~p~nLess: ~p~n", [Greater, Less]),
+   io:format ("=====================~n").
+
+
+cloop({M, F, A}, N) ->
+   CollectorPid = self(),
+   ok = loop_spawn({M, F, A}, CollectorPid, N),
+   collector(0, 0, 0, N, 1, []).
+
+
+loop_spawn({M, F, A}, CollectorPid, N) when N > 0 ->
+   spawn_link(fun() -> worker({M, F, A}, CollectorPid) end),
+   loop_spawn({M, F, A}, CollectorPid, N - 1);
+loop_spawn(_, _, 0) ->
+   ok.
+
+collector(Max, Min, Sum, N, I, List) when N >= I ->
+   receive
+      {result, Microsecond} ->
+         NewSum = Sum + Microsecond,
+         if
+            Max == 0 ->
+               NewMax = NewMin = Microsecond;
+            Max < Microsecond ->
+               NewMax = Microsecond,
+               NewMin = Min;
+            Min > Microsecond ->
+               NewMax = Max,
+               NewMin = Microsecond;
+            true ->
+               NewMax = Max,
+               NewMin = Min
+         end,
+         collector(NewMax, NewMin, NewSum, N, I + 1, [Microsecond|List])
+   after
+      10000 ->
+         ok
+   end;
+collector(Max, Min, Sum, N, _, List) ->
+   Aver = Sum / N,
+   {Greater, Less} = distribution(List, Aver),
+   {Max, Min, Sum, Aver, Greater, Less}.
+
+
+worker({M, F, A}, CollectorPid) ->
+   Microsecond = tc(M, F, A),
+   CollectorPid ! {result, Microsecond}.
+
diff --git a/src/testCase/utTryCatchCase.erl b/src/testCase/utTryCatchCase.erl
index a54d170..9114d63 100644
--- a/src/testCase/utTryCatchCase.erl
+++ b/src/testCase/utTryCatchCase.erl
@@ -1,7 +1,7 @@
 -module(utTryCatchCase).
 
 -compile([export_all, nowarn_unused_function, nowarn_unused_vars, nowarn_export_all]).
-
+-export([loopTest/4, testTryCatch/1, testTryCatch/2, testCatch/1, testCatch/2, testTryCatch2/1, testTryCatch2/2]).
 
 t1() ->
    Pid = spawn(fun() -> do_t1(1) end),
@@ -211,5 +211,84 @@ do_exit1() ->
    end.
 
 
+loopTest(0, _, _, _) -> ok;
+loopTest(Times, Fun, Type, IsLoop) ->
+   ?MODULE:Fun(Type, IsLoop),
+   loopTest(Times - 1, Fun, Type, IsLoop).
+
+testTryCatch(Type) -> testTryCatch(Type, false).
+
+testTryCatch(Type, TestLoop) ->
+   try
+      makeException(Type)
+   catch
+      Type:Reason ->
+         case TestLoop of
+            true -> ok;
+            false -> io:format("try .. catch block caught exception of ~p: ~p~n", [Type, Reason])
+         end
+   end.
+
+testTryCatch2(Type) -> testTryCatch(Type, false).
+
+testTryCatch2(Type, TestLoop) ->
+   try
+      makeException(Type)
+   catch
+      Type:Reason:Strace ->
+         case TestLoop of
+            true -> ok;
+            false -> io:format("try .. catch block caught exception of ~p: ~p: ~p:~n", [Type, Reason, Strace])
+         end
+   end.
+
+testCatch(Type) -> testCatch(Type, false).
+
+testCatch(Type, TestLoop) ->
+   case catch makeException(Type) of
+      ignore -> ignore;
+      Exception ->
+         case TestLoop of
+            true -> ok;
+            false -> io:format("catch block caught exception of ~p~n", [Exception])
+         end
+   end.
+
+
+makeException(Type) ->
+   case Type of
+      throw -> erlang:throw(test);
+      error -> erlang:error(test);
+      exit -> erlang:exit(test);
+      _ -> ignore
+   end.
+
+comRet() ->
+   ok.
+
+throwRet() ->
+   throw(ok).
+
+comRet1() ->
+   A = {tuple, 11},
+   F = A,
+   case F of
+      {tt, 44} ->
+         ok;
+      _ ->
+         A
+   end,
+   ok.
+
+throwRet1() ->
+   A = {tuple, 11},
+   F = A,
+   case F of
+      {tt, 44} ->
+         ok;
+      _ ->
+         A
+   end,
+   throw(ok).