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Preview vs Readahead - What's the difference?

preview | readahead |

As nouns the difference between preview and readahead

is that preview is a foretaste of something while readahead is the operation of reading data from a storage medium in advance so that it is immediately available when requested.

As a verb preview

is to show or watch something, or part of it, before it is complete.

preview

English

Noun

(wikipedia preview) (en noun)
  • A foretaste of something.
  • *{{quote-magazine, date=2013-06-07, author=David Simpson
    • , volume=188, issue=26, page=36, magazine=(The Guardian Weekly) , title= Fantasy of navigation , passage=It is tempting to speculate about the incentives or compulsions that might explain why anyone would take to the skies in [the] basket [of a balloon]: perhaps out of a desire to escape the gravity of this world or to get a preview of the next; […].}}
  • (colloquial) An advance showing of a film, exhibition etc.
  • Something seen in advance.

    • Synonyms

    * forelook

    Verb

    (en verb)
  • To show or watch something, or part of it, before it is complete.

    • readahead

    English

    Noun

    (-)
  • (computing) The operation of reading data from a storage medium in advance so that it is immediately available when requested.