What is "run time"

n. 1 (context computing English) The time during which a program is execute. 2 (context media English) The length of a film, television program or audio track in minutes, usually with end credits included

In computer science, run time, runtime or execution time is the time during which a program is running ( executing), in contrast to other program lifecycle phases such as compile time, link time and load time.

A run-time is detected after or during the execution (running state) of a program, whereas a compile-time error is detected by the compiler before the program is ever executed. Type checking, register allocation, code generation, and code optimization are typically done at compile time, but may be done at run time depending on the particular language and compiler.

Run time, run-time, or runtime may refer to:

• Run time (program lifecycle phase), the period during which a computer program is executing
• Runtime system, software designed to support the execution of computer programs
• Runtime library, a program library designed to implement functions built into a programming language
• Software execution, the process of performing instructions one by one during the run time phase
• The duration of a film or television program