fastmap

1.2.0

Fast Data Structures

25packages depend

13.1Mdownloads / year

89.4%test coverage

13/13checks pass

Overview

About

Maintained by Winston ChangFirst published 2019-07-285 releasesCRAN page ↗GitHub ↗

Fast implementation of data structures, including a key-value store, stack, and queue. Environments are commonly used as key-value stores in R, but every time a new key is used, it is added to R's global symbol table, causing a small amount of memory leakage. This can be problematic in cases where many different keys are used. Fastmap avoids this memory leak issue by implementing the map using data structures in C++.

Install

R (CRAN)pak (dev)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("fastmap", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("r-lib/fastmap")

Development version from r-lib/fastmap. Installs pak first if it is not already available.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-fastmap

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-fastmap

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-fastmap

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

13OK

Slowest check: 1.3 min · r-oldrel-windows-x86_64

Code health

Yes

Tests · ratio 1.04

89.4%

Coverage · measured lines

100%

Documentation · exports

Dependencies · direct

Check history

OK2026-05-11
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-05-10
12 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-04-30
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-04-28
12 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-04-18
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Show 4 earlier snapshots

ERROR2026-04-16
13 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-03-30
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-03-29
13 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 1,124 wordsVignettesNopkgdown siteNoNEWSYes · 33% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 100%
Return-value docs: 0%
References docs: 0%

Downloads

13.1M

CRAN downloads in the past year

Rank #59 · ~35.9K/day · ~1.1M/mo

Releases R versions

Daily download trend is not available in this view yet.

1.1M30 days

3.2M90 days

13.1M1 year

Compare downloads with other packages →

Also on153.1K r2u124 autocran1.2M conda_forge5.2K c2d4u

Repository

GitHub ↗ r-lib/fastmap

135Stars

9Forks

3Open issues

3Open PRs

5Releases

181Commits

4Contributors

181 commits · Last activity 2026-04-20 · 0% stars, 30d

Stars over time

2025-07-15 · 1352026-07-07 · 135

Repository practices

Upstream repositoryBeta

2 development-tooling and community-health practices detected across 2 families in the upstream repository

Checks run against github.com/r-lib/fastmap on 2026-07-26.

Continuous integration (1)

GitHub Actions

Lint, format, editor (1)

RStudio project

How this is detected·Detection ruleset v1 (2026-07-18)

Dependencies

Declared dependencies

1 external dependency (excludes base and recommended)

Depends (0)

none

Imports (0)

none

LinkingTo (0)

none

Suggests (1)

testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

25direct

4,117indirect

ResultModelManager TreeSearch bidsr bslib cachem chromote dipsaus filearray htmltools hydroloom ieegio keras3 keyATM ompr opencesp promises rang ravepipeline readNSx rpymat shidashi shiny shinychat shinymeta jmvcore

Code & Tests

People & History

People (3)

Maintainer (1)

Winston Chang

Author, Maintainer

Authors (1)

Author, Maintainer

Funders (1)

Listed in earlier versions (1)

RStudio

no longer listed · 1.0.0 to 1.1.1

Package Timeline

5 releases. Pick two to compare their code metrics. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
1.2.0Latest
2024-05-15 · current release · diff ↗
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
1.1.1
2023-02-24 · diff ↗
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
1.1.0
2021-01-25 · diff ↗
R
R 4.0.0 released · 2020-04-24
1.0.1
2019-10-08 · diff ↗
1.0.0
2019-07-28
R
R 3.6.0 released · 2019-04-26

Package metadata

First published: 2019-07-28
Total releases: 5 / 7 yrs
License: MIT + file LICENSE OSI
Download size: 46 KB
Installed size: not tracked yet
With dependencies: not tracked yet

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