Exact Search and Graph Construction for 'bigmemory' Matrices R package bigKNN version 0.3.0 Exact nearest-neighbour and radius-search routines that operate directly on 'bigmemory::big.matrix' objects. The package streams row blocks through 'BLAS' kernels, supports self-search and external-query search, exposes prepared references for repeated queries, and can build exact k-nearest-neighbour, radius, mutual k-nearest-neighbour, and shared-nearest-neighbour graphs. Version 0.3.0 adds execution plans, serializable prepared caches, resumable streamed graph jobs, coercion helpers, exact candidate reranking, and recall summaries for evaluating approximate neighbours. Software Depends: R (>= 3.5.0) Imports: Matrix, Rcpp (>= 1.0.12), methods LinkingTo: Rcpp, bigmemory, BH Suggests: bigmemory, knitr, rmarkdown, testthat (>= 3.0.0) Frederic Bertrand <frederic.bertrand@lecnam.net> Comprehensive R Archive Network (CRAN) Frederic Bertrand [aut, cre] GPL (>= 2) 2026-04-01 application/tgz https://CRAN.R-project.org/package=bigKNN doi:10.32614/CRAN.package.bigKNN