Deterministic, Zero-Copy Parallel Execution for R R package shard version 0.1.0 Provides a parallel execution runtime for R that emphasizes deterministic memory behavior and efficient handling of large shared inputs. 'shard' enables zero-copy parallel reads via shared/memory-mapped segments, encourages explicit output buffers to avoid large result aggregation, and supervises worker processes to mitigate memory drift via controlled recycling. Diagnostics report peak memory usage, end-of-run memory return, and hidden copy/materialization events to support reproducible performance benchmarking. Software Depends: R (>= 4.1.0) Imports: methods, parallel, stats, tools, utils Suggests: knitr, pkgload, rmarkdown, testthat (>= 3.0.0), ps, jsonlite, tibble, withr Bradley Buchsbaum <brad.buchsbaum@gmail.com> Comprehensive R Archive Network (CRAN) Bradley Buchsbaum [aut, cre, cph] MIT + file LICENSE (https://CRAN.R-project.org/package=shard/LICENSE) 2026-04-03 application/tgz https://CRAN.R-project.org/package=shard doi:10.32614/CRAN.package.shard en-US