This thesis studies the Weberian notion of rationality in the context of speedrunning and the speedrunning community. By contrasting the instrumental rationality of the speedrunning practice with the value-oriented rationality of the community, it crystallizes the difference between "performing the metrics" as an extension of community values and as a function of externally imposed constraints. The former is an expression of autonomy, while the latter an expression of heteronomy. This difference, it is argued, is found in many different areas of society, sometimes in the guise of "audit culture", at other times as an unintended side-effect of established forms of practice. In either case, a return to communal values (e.g. the sociological imagination) is seen as an antidote to becoming an extension of someone else’s metrics; autonomy is not a function of performing to external specifications, but of being able to rationally choose which measurements to use and which to leave aside. Speedrunners, in their endeavor to go fast, express such autonomy, albeit implicitly. By analyzing YouTube videos wherein runners explain their tactics and methods, this thesis endeavors to make this aspect of autonomy ever so slightly more explicit.