note enigma <p>Thanks for quick response.</p><p>In my openion <code>use constant;</code> is a good solution for debug/info/error msgs. But if we are talking about tracing ...</p> <p>it is like in log file ... </p> <code> [<date_time>] TRACE: entering sub for ... [<date_time>] TRACE: parameters passed ... [<date_time>] TRACE: exiting sub for ... </code> <p>as core module add attribute features during compilation only, there is less performance issue...less cluttering in your code. as compared to explicitly writing entry/exit for each module.</p> 1000101 1000104