I mean, the study I remember (from when I was in some class 20 years ago or something, where we would have analyzed this sort of paper) showed that developers listening to music 1) completed the tasks at the same rate as the developers who were not listening to music, 2) reported the task being less boring than the developers who were not listening to music, and... 3) were much much less likely to notice that the code they had been asked to write was an elaborate maze of math that could be replaced with "return 0"; I thereby only listen to music while coding when I need to keep my morale up typing something I already pre-planned myself.

From Brian Hook[0], who worked with John Carmack at id Software:

> I remember Carmack talking about productivity measurement. While working he would play a CD, and if he was not being productive, he'd pause the CD player. This meant any time someone came into his office to ask him a question or he checked email he'd pause the CD player. He'd then measure his output for the day by how many times he played the CD (or something like that -- maybe it was how far he got down into his CD stack). I distinctly remember him saying "So if I get up to go to the bathroom, I pause the player".

> You know what's pretty hardcore? Thinking that going to the bathroom is essentially the same as fucking off.

0: http://bookofhook.blogspot.com/2013/03/smart-guy-productivit...

And what’s the coffee machine running too ? wouldn’t be surprised to see armv7 in use there.