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

If you create a shortcut to the console in a common core script, eg:

var con = console;

and then use con.log("message") or con.error("error message") throughout your code, on production you can simply rewire con in the core location to:

var con = {
    log: function() {},
    error: function() {},
    debug: function() {}
}