Enhance logging performance

OTP-9575

2 files changed, 18 insertions, 12 deletions

diff --git a/lib/common_test/src/ct_framework.erl b/lib/common_test/src/ct_framework.erl
index 089d5be871..63a7c37fa6 100644
--- a/lib/common_test/src/ct_framework.erl
+++ b/lib/common_test/src/ct_framework.erl
@@ -116,7 +116,7 @@ init_tc1(Mod,Func,[Config0],DoInit) when is_list(Config0) ->
     Config = lists:keydelete(watchdog,1,Config1),
     if Func /= init_per_suite, DoInit /= true ->
 	    ok;
-	true ->
+       true ->
 	    %% delete all default values used in previous suite
 	    ct_config:delete_default_config(suite),
 	    %% release all name -> key bindings (once per suite)
@@ -133,7 +133,7 @@ init_tc1(Mod,Func,[Config0],DoInit) when is_list(Config0) ->
     ct_config:delete_default_config(testcase),
     case add_defaults(Mod,Func,TestCaseInfo,DoInit) of
 	Error = {suite0_failed,_} ->
-	    ct_logs:init_tc(),
+	    ct_logs:init_tc(false),
 	    FuncSpec = group_or_func(Func,Config0),
 	    ct_event:notify(#event{name=tc_start,
 				   node=node(),
@@ -143,7 +143,7 @@ init_tc1(Mod,Func,[Config0],DoInit) when is_list(Config0) ->
 	{SuiteInfo,MergeResult} ->
 	    case MergeResult of
 		{error,Reason} when DoInit == false ->
-		    ct_logs:init_tc(),
+		    ct_logs:init_tc(false),
 		    FuncSpec = group_or_func(Func,Config0),
 		    ct_event:notify(#event{name=tc_start,
 					   node=node(),
@@ -194,8 +194,11 @@ init_tc2(Mod,Func,SuiteInfo,MergeResult,Config,DoInit) ->
 	Conns ->
 	    ct_util:silence_connections(Conns)
     end,
-    
-    ct_logs:init_tc(),
+    if Func /= init_per_suite, DoInit /= true ->
+	    ct_logs:init_tc(false);
+       true ->
+	    ct_logs:init_tc(true)
+    end,
     FuncSpec = group_or_func(Func,Config),
     ct_event:notify(#event{name=tc_start,
 			   node=node(),
diff --git a/lib/common_test/src/ct_logs.erl b/lib/common_test/src/ct_logs.erl
index 0580a814c4..3798f26f7b 100644
--- a/lib/common_test/src/ct_logs.erl
+++ b/lib/common_test/src/ct_logs.erl
@@ -28,7 +28,7 @@
 
 -module(ct_logs).
 
--export([init/1,close/2,init_tc/0,end_tc/1]).
+-export([init/1,close/2,init_tc/1,end_tc/1]).
 -export([get_log_dir/0,log/3,start_log/1,cont_log/2,end_log/0]).
 -export([set_stylesheet/2,clear_stylesheet/1]).
 -export([add_external_logs/1,add_link/3]).
@@ -197,15 +197,14 @@ cast(Msg) ->
 	    ?MODULE ! Msg
     end.
 
-
 %%%-----------------------------------------------------------------
-%%% @spec init_tc() -> ok
+%%% @spec init_tc(RefreshLog) -> ok
 %%%
 %%% @doc Test case initiation (tool-internal use only).
 %%%
 %%% <p>This function is called by ct_framework:init_tc/3</p>
-init_tc() ->
-    call({init_tc,self(),group_leader()}),
+init_tc(RefreshLog) ->
+    call({init_tc,self(),group_leader(),RefreshLog}),
     ok.
 
 %%%-----------------------------------------------------------------
@@ -505,11 +504,15 @@ logger_loop(State) ->
 		    [begin io:format(Fd,Str,Args),io:nl(Fd) end || {Str,Args} <- List],
 		    logger_loop(State#logger_state{tc_groupleaders=TCGLs})
 	    end;
-	{{init_tc,TCPid,GL},From} ->
+	{{init_tc,TCPid,GL,RefreshLog},From} ->
 	    print_style(GL, State#logger_state.stylesheet),
 	    set_evmgr_gl(GL),
 	    TCGLs = add_tc_gl(TCPid,GL,State),
-	    make_last_run_index(State#logger_state.start_time),
+	    if not RefreshLog ->
+		    ok;
+	       true ->
+		    make_last_run_index(State#logger_state.start_time)
+	    end,
 	    return(From,ok),
 	    logger_loop(State#logger_state{tc_groupleaders=TCGLs});
 	{{end_tc,TCPid},From} ->