Fast, memory constant hashing of R objects
The object to generate a hash digest for
(optional) A serializer for reference-style
obj will be hashed using R's internal serialization logic
with a custom target which applies applying Jenkins' SpookyHash (v2) in a
streaming fashion. This avoids (ever) copying the data out of the R object
itself, providing both speed and memory constancy.
It also guarantees that the "representation" of the R object being hashed is the same as the serialized version would be, if created.
Jenkins, B. (2012). SpookyHash: a 128-bit noncryptographic hash. http://burtleburtle.net/bob/hash/spooky.html.
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