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https://github.com/coolbutuseless/yyjsonr
Fast JSON package for R
https://github.com/coolbutuseless/yyjsonr
Last synced: 26 days ago
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Fast JSON package for R
- Host: GitHub
- URL: https://github.com/coolbutuseless/yyjsonr
- Owner: coolbutuseless
- License: other
- Created: 2023-08-16T00:14:04.000Z (over 1 year ago)
- Default Branch: main
- Last Pushed: 2024-04-12T23:12:48.000Z (8 months ago)
- Last Synced: 2024-04-14T07:18:27.161Z (8 months ago)
- Language: C
- Homepage: https://coolbutuseless.github.io/package/yyjsonr/index.html
- Size: 4.51 MB
- Stars: 102
- Watchers: 6
- Forks: 5
- Open Issues: 15
-
Metadata Files:
- Readme: README.Rmd
- License: LICENSE
Awesome Lists containing this project
- jimsghstars - coolbutuseless/yyjsonr - Fast JSON package for R (C)
README
---
title: yyjsonr
output: github_document
---
```{r, include = FALSE}
knitr::opts_chunk$set(
collapse = TRUE,
comment = "#>",
fig.path = "man/figures/README-",
fig.height = 3,
out.width = "100%"
)
library(tidyr)
library(yyjsonr)
if (FALSE) {
covr::report(covr::package_coverage(
line_exclusions = list('src/yyjson.c', 'src/yyjson.h')
))
}
if (FALSE) {
pkgdown::build_site(override = list(destination = "../coolbutuseless.github.io/package/yyjsonr"))
}
# Makevars options to do some deep testing for CRAN
# Type conversions are sane
# PKG_FLAG=-Wconversion
# Pointer overflow checks i.e. dodgy pointer arithmetic
# PKG_CFLAGS+=-fsanitize=pointer-overflow -fsanitize-trap=pointer-overflow
# Then run in the debugger:
# R -d lldb
# run
# testthat::test_local()
```
# yyjsonr 
[](https://cran.r-project.org/package=yyjsonr)
[](https://github.com/coolbutuseless/yyjsonr/actions/workflows/R-CMD-check.yaml)
`{yyjsonr}` is a fast JSON parser/serializer, which converts R data to/from JSON.
In most cases it is around 2x to 10x faster than `{jsonlite}` at both reading and writing JSON.
It is a wrapper for the [`yyjson`](https://github.com/ibireme/yyjson) C library (v0.9.0 April 8, 2024).
`yyjson` is MIT licensed - see `LICENSE-yyjson.txt` in this package for more details -
`readLines(system.file('LICENSE-yyjson.txt', package = 'yyjsonr', mustWork = TRUE))`
### What's in the box
This package contains specialized functions for each type of operation (read/write/validate) and the
storage location of the JSON (string/file/raw vector/connection).
#### Vanilla JSON
| | string | file | raw | conn | options |
|----------|---------------------|----------------------|-----------------|------------------|----------------------|
| read | read_json_str() | read_json_file() | read_json_raw() | read_json_conn() | opts_read_json() |
| write | write_json_str() | write_json_file() | | | opts_write_json() |
| validate | validate_json_str() | validate_json_file() | | | |
#### NDJSON
| | string | file | raw | conn | options |
|----------|---------------------|----------------------|-----------------|------------------|----------------------|
| read | read_ndjson_str() | read_ndjson_file() | | | opts_read_json() |
| write | write_ndjson_str() | write_ndjson_file() | | | opts_write_json() |
#### GeoJSON
| | string | file | raw | conn | options |
|----------|---------------------|----------------------|-----------------|------------------|----------------------|
| read | read_geojson_str() | read_geojson_file() | | | opts_read_geojson() |
| write | write_geojson_str() | write_geojson_file() | | | opts_write_geojson() |
### Speed
In the following plots, bigger is better, with `yyjsonr` results in blue.
#### JSON
#### NDJSON
#### GeoJSON
Note: Benchmarks were run on Apple M2 Mac. See files `man/benchmark/benchmark*.Rmd` for details.
## Installation
This package can be installed from CRAN
``` r
install.packages('yyjsonr')
```
You can install the latest development version from [GitHub](https://github.com/coolbutuseless/yyjsonr) with:
``` r
# install.package('remotes')
remotes::install_github('coolbutuseless/yyjsonr')
```
Pre-built source/binary versions can also be installed from [R-universe](https://r-universe.dev)
``` r
install.packages('yyjsonr', repos = c('https://coolbutuseless.r-universe.dev', 'https://cloud.r-project.org'))
```
Simple JSON example
==============================================================================
```{r}
library(yyjsonr)
str <- write_json_str(head(iris, 3), pretty = TRUE)
cat(str)
read_json_str(str)
```
Simple GeoJSON example
==============================================================================
When parsing GeoJSON, `{yyjsonr}` returns an `sf` object.
```{r}
read_geojson_str(geojsonsf::geo_melbourne) |>
head() |>
sf:::print.sf()
```
## Limitations
* Some datatypes not currently supported. Please file an issue on GitHub if
these types are critical for you. Providing test cases also appreciated!:
* Complex numbers
* POSIXlt
* Matrices of POSIXct / Date
## Acknowledgements
* R Core for developing and maintaining the language.
* CRAN maintainers, for patiently shepherding packages onto CRAN and maintaining
the repository