This is part of the Semicolon&Sons Code Diary - consisting of lessons learned on the job. You're in the logging category.
Last Updated: 2024-11-21
Say I have this line of code:
logger.debug "#{current_user.name}"
Even if I am using the info level logger, which would not log this line, the
program still evaluates that string prior to deciding whether to log. Because
fetching the current_user performs a DB query, this can slow the program down
enormously despite the logging being off.
What you really want to do is delay execution by using a lambda/anon function-like structure:
logger.debug { "#{current_user.name}" }
Ensure that your logging doesn't cause unnecessary slow-down by using lambdas which can be switched off for execution during the quieter log levels.