Monitoring performance with time
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The time command is an excellent tool for analyzing the performance of a shell script or command. Simply type time followed by the command that you wish to time. Three results are printed when the program or script finishes executing: the actual length of time (real-world time spent on the program), the total time spent in the program, and the total time spent on CPU overhead. The first figure is perhaps the most useful, but the third figure will tell you how busy your CPU is.
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The time command is an excellent tool for analyzing the performance of a shell script or command. Simply type time followed by the command that you wish to time. Three results are printed when the program or script finishes executing: the actual length of time (real-world time spent on the program), the total time spent in the program, and the total time spent on CPU overhead. The first figure is perhaps the most useful, but the third figure will tell you how busy your CPU is.
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