m4: Frozen files
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1 15 Fast loading of frozen state
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1 Some bigger 'm4' applications may be built over a common base containing
1 hundreds of definitions and other costly initializations. Usually, the
1 common base is kept in one or more declarative files, which files are
1 listed on each 'm4' invocation prior to the user's input file, or else
1 each input file uses 'include'.
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1 Reading the common base of a big application, over and over again,
1 may be time consuming. GNU 'm4' offers some machinery to speed up the
1 start of an application using lengthy common bases.
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