Doc Comments / Phobos /
Std Mmfile
std.mmfile
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I'd love to see 2 things added to the documentation.
First, a mention as to when to use a memory mapped file, especially compared to just loading a file in memory, changing it and finally writing it back. (Yes, of course if the file is big. But any other considerations, pro/con.)
Second, a short example of a typical use wouldn't hurt.
Links
See the corresponding page in the D Specification: 
DigitalMars:d/phobos/std_mmfile.html