fastdigest: Fast, memory constant hashing of R objects

In fastdigest: Fast, Low Memory Footprint Digests of R Objects

Fast, memory constant hashing of R objects

Description

Fast, memory constant hashing of R objects

Usage

fastdigest(obj, ref_serializer = NULL)

Arguments

obj	The object to generate a hash digest for
ref_serializer	(optional) A serializer for reference-style objects, see serialize

Details

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.

Author(s)

Gabriel Becker

References

Jenkins, B. (2012). SpookyHash: a 128-bit noncryptographic hash. http://burtleburtle.net/bob/hash/spooky.html.

See Also

serialize

Examples

fastdigest(1:5)
fastdigest(list("what", 1:2))

fastdigest documentation built on May 29, 2024, 10:05 a.m.