Surrounded every log writing command with LOGIF macro, which tests if the given logfile id matches with those enabled. The comparison is done against local variable and expensive function call is avoided.

server/modules/protocol/telnetd.c

@@ -37,6 +37,8 @@
 #include <skygw_utils.h>
 #include <log_manager.h>
 
+extern int lm_enabled_logfiles_bitmask;
+
 /**
  * @file telnetd.c - telnet daemon protocol module
  *
@@ -107,7 +109,9 @@ version()
 void
 ModuleInit()
 {
-	skygw_log_write(LOGFILE_TRACE, "Initialise Telnetd Protocol module.\n");
+	LOGIF(LT, (skygw_log_write(
+                           LOGFILE_TRACE,
+                           "Initialise Telnetd Protocol module.\n")));
 }
 
 /**