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tight loop

   Also found in: Wikipedia 0.04 sec.
(programming)tight loop - 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.


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To connect the ferries to the subway system, the best opportunity exists at the South Ferry Station with the #1 and the #9 lines, which is a very tight loop and doesn't function very well," he says.
Money in place, but plans for transportation hub lag behind by Misonzhnik, Elaine / Real Estate Weekly
These flags may be attached in several ways--glue, staples, or by sewing a tight loop along one edge of the flag, which may be firmly pulled over the ends of the flag shaft exactly 24 inches from an end.
A Multi-Purpose Flag System by Pilkington, Dr. James / Coach and Athletic Director
That leaves a sphere with a red outside and a tight loop that must be pulled through itself.
Inside moves: a new look at the mathematical problem of turning a ... by Peterson, Ivars / Science News
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