noun
execution time; run time
Computing term for the time a program or process takes to complete.
このプログラムの実行時間は約5秒です。
The execution time of this program is about 5 seconds.
実行時間を短縮するためにコードを最適化した。
I optimized the code to reduce the run time.
処理時間 is a broader term for processing time, while 実行時間 specifically refers to the time a program or command is actually running.
Compound of 実行 (execution) and 時間 (time).