home | O'Reilly's CD bookshelfs | FreeBSD | Linux | Cisco | Cisco Exam  

UNIX Power Tools

UNIX Power ToolsSearch this book
Previous: 38.18 nohup Chapter 39 Next: 39.2 Timing Programs

39. Time and Performance

39.1 Which Time Is It?

When we talk about "time" on UNIX systems, we could be talking about two things:

  1. What time it is, as shown by the date ( 51.10 ) command, and recorded in countless ways - as file creation and modification times, as the time of last login, and so on.

  2. How long things take.

This chapter is concerned with the latter. It talks about how long programs take to run, what makes them faster or slower, and what you can (or more often can't) do about it.


Previous: 38.18 nohup UNIX Power Tools Next: 39.2 Timing Programs
38.18 nohup Book Index 39.2 Timing Programs

The UNIX CD Bookshelf Navigation The UNIX CD BookshelfUNIX Power ToolsUNIX in a NutshellLearning the vi Editorsed & awkLearning the Korn ShellLearning the UNIX Operating System