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### 2.4 Work Faster: `-f`

``-f`' should only be used when assembling programs written by a (trusted) compiler. ``-f`' stops the assembler from doing whitespace and comment preprocessing on the input file(s) before assembling them. See Preprocessing.

> Warning: if you use ``-f`' when the files actually need to be preprocessed (if they contain comments, for example), `as` does not work correctly.