runtime
n. C / Un. the amount of time a movie, play, or computer program lasts from start to finish. In computing, runtime refers to the period when a program is actually being executed or running, rather than when it is being written or compiled.
n. the duration of a performance or the period during which a computer program is executing. Often written as one word in technical and cinematic contexts. In computing, runtime describes the phase during which a program is executing on a computer system, often used to discuss errors or resource usage that occur only while the code is active.
The movie has a runtime of two hours.
The software developer optimized the code to reduce the application's runtime and improve the user experience.
While the director's cut features a three-hour runtime, the theatrical version was edited down to two hours to ensure more frequent daily screenings at local cinemas.
Usually uncountable when referring to the general period of execution in computing; countable when referring to the specific duration of a film or performance.