What is a “tight loop”?

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From Wiktionary:

  1. (computing) In assembly languages, a loop which contains few instructions and iterates many times.
  2. (computing) Such a loop which heavily uses I/O or processing resources, failing to adequately share them with other programs running in the operating system.

For case 1 it is probably like

for (unsigned int i = 0; i < 0xffffffff; ++ i) {}

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