re: What JS Logging library / tool do you use? VIEW POST

re: This code has a weird smell. Can you give me an example of an expensive function call where the only thing you would want to do is log the output i...

It is an example. The point is that if you do expensive things to produce the arguments of a log call, the fact that the log function is a no-op does not help with performance. In such cases you need the if. The example is there to demonstrate the if.

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