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tight loop

tight loop in Technology
programming
A loop of code that executes without releasing any resources to other programs or the operating system.
Consider the following pointless BASIC loop that counts upward indefinitely
10 i = i + 1 20 GOTO 10
Run on a single-user system such as MS-DOS this will not cause any problems. Run on a cooperative multitasking operating system such as Windows 3, the system would appear to freeze.
A pre-emptive multitasking operating system such as UNIX or Windows NT would "steal" cycles away from the program and continue to run other programs.
See also busy-wait and multitasking.
(1999-05-06)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Examples from the Web for tight loop
Historical Examples
  • Larkin, in the plane ahead, brought his stick backward as he made ready to go over in a tight loop.

    Aces Up Covington Clarke
  • The rope is now drawn through the ring until it forms a tight loop, encircling the belly just in front of the hind limbs.

    Special Report on Diseases of Cattle U.S. Department of Agriculture

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