Hello,

attached a patch that optimize 2 unneeded lookups in both AddKey and
RemoveKey. In the case of AddKey, I used the first overload of
map::insert[1], which returns a pair "consisting of an iterator to the
inserted element (or to the element that prevented the insertion) and
a bool denoting whether the insertion took place."

Regards,
Francesco

[1] https://en.cppreference.com/w/cpp/container/map/insert

Attachment: PdfDictionary-optimize-AddKey-RemoveKey.diff
Description: Binary data

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