Will console.log reduce JavaScript execution performance?

Question

Will use of the debugging feature console.log reduce JavaScript execution performance? Will it affect the speed of script execution in production environments?

Answer 1

I do it this way to maintain original signature of console methods. In a common location, loaded before any other JS:

var DEBUG = false; // or true 

Then throughout code

if (DEBUG) console.log("message", obj, "etc");
if (DEBUG) console.warn("something is not right", obj, "etc");