Tested with the looping going up to n <= 65
node-simplelogger: 12.2s (with slight delay after it finished printing before the process ended)
no logging: 10.6s
console.log: 12.8s
These measurements came from adjust line 33 of this file: https://github.com/dsernst/ProjectEuler/blob/67a9c17f0810ff6a5da5c20c027e8c11c7a0c304/53%20Combinatoric%20selections.js#L33
The point of these tests were to see if using an asyncronous logger would be faster than node's built in console
. In this case, it did not make a meaningful difference.