R Observatory: Metrics for ndjson version 0.9.1

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

ndjson

0.9.1Package record

Wicked-Fast Streaming 'JSON' ('ndjson') Reader

1packages depend

43.4Kdownloads / year

39.3%test coverage

13/13flavors OK

Overview

About

Maintained by Bob RudisCRAN page ↗GitHub ↗Issues ↗

Streaming 'JSON' ('ndjson') has one 'JSON' record per-line and many modern 'ndjson' files contain large numbers of records. These constructs may not be columnar in nature, but it is often useful to read in these files and "flatten" the structure out to enable working with the data in an R 'data.frame'-like context. Functions are provided that make it possible to read in plain 'ndjson' files or compressed ('gz') 'ndjson' files and either validate the format of the records or create "flat" 'data.table' structures from them.

Install

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

install.packages("ndjson", 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("hrbrmstr/ndjson")

Development version from hrbrmstr/ndjson. 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-ndjson

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled. We list this channel from recorded r2u download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

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-ndjson

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-ndjson

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed). We list this channel from recorded autoCRAN download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

Health

CRAN checks

13OK

CRAN check page ↗

Slowest check: 2.6 min · r-devel-windows-x86_64

Status changes

OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK14 OK2026-04-22
ERROR13 OK, 1 ERROR2026-04-18
OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.9.1

README· In the repository, left out of the releaseVignettesNoNEWS· In the repository, left out of the releaseCitation fileNo

Help pages: 4includes a package overview page
Examples that run: 100%3 run in a plain check
Exported functions with examples: 100%
Documented parameters: 100%
Return-value docs: 100%
Help pages citing references: 50%

How these are measured

Downloads

43.4K

CRAN downloads in the past year

Rank #2,357 · ~119/day · ~3.6K/mo

Releases R versions

Daily download trend is not available in this view yet.

2.5K30 days

7K90 days

43.4K1 year

Compare downloads with other packages →

Also on637 r2u5 autocran3.5K conda_forge115 c2d4u

How downloads are counted

Repository

hrbrmstr/ndjson ↗Account: hrbrmstr

56Stars

10Forks

4Open issues

0Open PRs

2Releases

81Commits

4Commit identities

rndjsonrstatsjsonr-cyber

81 commits · Last activity 2022-10-16 · -1.8% stars, 30d · The default branch showed an older version (0.9.0) than CRAN on 2026-10-18

Responsiveness

How these are sampled

PRs merged (all time): 100%
Median days to close, 50 most recently updated closed issues: 104
Median days to close, 50 most recently updated closed PRs: 0

Stars over time

2026-07-14 · 562026-10-03 · 56

How these are measured

PracticesBeta

8 development-tooling and community-health practices detected across 5 families in the upstream repository

Checks run against github.com/hrbrmstr/ndjson on 2026-10-18.

Continuous integration (1)

Travis CI (config file)

Governance and community (2)

Code of conduct

The repository owner accepts GitHub Sponsors

Docs source (2)

README.Rmd

GitHub Pages site last deployed 2022-10-16

CRAN release process (2)

cran-comments.mdCRAN-SUBMISSION

Show all practicesHide 1 practice

Lint, format, editor (1)

RStudio project

How this is detected·Detection ruleset v3 (2026-09-26)

Dependencies

Declared dependencies

6 external dependencies (excludes base and recommended)

Installing ndjson adds 12 packages (9 with compiled code, 12 MB of source tarballs). Heaviest: data.table 5.7 MB, Rcpp 1.8 MB, vctrs 1.0 MB.

Depends (1)

R >= 3.2.0

Imports (3)

Rcpp data.table tibble

LinkingTo (1)

Rcpp

Suggests (2)

tinytest covr

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

1direct

8indirect

Depends 1

Depends, Imports or LinkingTo, most downloaded first

streamR

How these are counted

Code & Tests

People & History

People (6)

Bob Rudis

Author, Maintainer since 0.2.0 (2016)

Deepak Bandyopadhyay

Author

C++ gzstream

Lutz Kettner

Author

C++ gzstream

Niels Lohmann

Author

C++ json parser

Maarten Demeyer

Contributor · added in 0.8.0

dtplyr cleanup

Neal Fultz

Contributor · added in 0.8.0

Rcpp integration

Releases (7)

Pick two releases to compare their code metrics.

R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
0.9.1Latest
record
2025-03-06 · current release · diff ↗
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
0.9.0
record
2022-10-17 · diff ↗
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
R
R 4.0.0 released · 2020-04-24
0.8.0
record
2019-11-13 · diff ↗
R
R 3.6.0 released · 2019-04-26
0.7.0
record
2018-09-18 · diff ↗
R
R 3.5.0 released · 2018-04-23
0.6.0
record
2018-03-05 · diff ↗
0.5.0
record
2017-06-28 · diff ↗ ·
added 1 export
flatten
R
R 3.4.0 released · 2017-04-21

Show 2 earlier eventsHide 2 earlier events

0.2.0
record
2016-08-27
R
R 3.3.0 released · 2016-05-03

Package metadata

First published: 2016-08-27
Total releases: 7 / 10 yrs
License: MIT + file LICENSE OSI · relicensed from AGPL in 0.6.0
Minimum R: ≥ 3.2.0
Download size: 143 KB

Appears in task views

Web Technologies and Services

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("ndjson")

Format

Rudis, B., Bandyopadhyay, D., Demeyer, M., Fultz, N., Kettner, L., & Lohmann, N. (2025). ndjson: Wicked-Fast Streaming 'JSON' ('ndjson') Reader (Version 0.9.1) [Computer software]. https://doi.org/10.32614/CRAN.package.ndjson

This package has no citation file, so citation() returns this entry built from DESCRIPTION.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for ndjson version 0.9.1 [Data set]. HJJB, LLC. Data release v2026-10-21. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-21, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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