fastdigest: Fast, Low Memory Footprint Digests of R Objects

Provides an R interface to Bob Jenkin's streaming, non-cryptographic 'SpookyHash' hash algorithm for use in digest-based comparisons of R objects. 'fastdigest' plugs directly into R's internal serialization machinery, allowing digests of all R objects the serialize() function supports, including reference-style objects via custom hooks. Speed is high and scales linearly by object size; memory usage is constant and negligible.

Version: 0.6-4
Suggests: RUnit
Published: 2024-04-05
DOI: 10.32614/CRAN.package.fastdigest
Author: Gabriel Becker, based on SpookyHash algorithm and C++ code by Bob Jenkins
Maintainer: Gabriel Becker <gabembecker at>
License: Artistic-2.0
NeedsCompilation: yes
Materials: README
CRAN checks: fastdigest results


Reference manual: fastdigest.pdf


Package source: fastdigest_0.6-4.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
macOS binaries: r-release (arm64): fastdigest_0.6-4.tgz, r-oldrel (arm64): fastdigest_0.6-4.tgz, r-release (x86_64): fastdigest_0.6-4.tgz, r-oldrel (x86_64): fastdigest_0.6-4.tgz
Old sources: fastdigest archive


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