# simdjson

> JSON library

**Wikidata**: [Q104075634](https://www.wikidata.org/wiki/Q104075634)  
**Source**: https://4ort.xyz/entity/simdjson

## Summary
Simdjson is a free, cross-platform JSON library designed for high-performance parsing. It leverages SIMD (Single Instruction Multiple Data) instructions to accelerate JSON processing, making it particularly efficient for large-scale data applications. Released under the Apache Software License 2.0, it is widely used in systems requiring fast JSON parsing.

## Key Facts
- **License**: Apache Software License 2.0 (as of 2020-12-10)
- **Latest Version**: 0.4.7 (released on 2020-07-17)
- **Developer**: Milo Yip
- **Platform**: Cross-platform (compatible with multiple operating systems)
- **Programming Language**: C++ (as of 2025-07-06)
- **Package Names**: `dev-libs/simdjson` (Gentoo), `libsimdjson-dev`, `libsimdjson0` (Ubuntu)
- **Website**: [https://simdjson.org/](https://simdjson.org/)
- **Source Code**: Hosted on GitHub at [https://github.com/simdjson/simdjson](https://github.com/simdjson/simdjson)

## FAQs
### Q: What is simdjson used for?
A: Simdjson is primarily used for parsing JSON data efficiently, especially in applications requiring high-speed processing of large JSON files. Its SIMD-optimized design makes it ideal for performance-critical scenarios.

### Q: Is simdjson free to use?
A: Yes, simdjson is free software distributed under the Apache Software License 2.0, allowing users to run, study, modify, and distribute it freely.

### Q: What programming language does simdjson support?
A: Simdjson is primarily implemented in C++ and is designed to be integrated into C++ applications.

### Q: How does simdjson compare to other JSON libraries?
A: Unlike traditional JSON libraries, simdjson leverages SIMD instructions to parse JSON data in parallel, significantly improving performance for large datasets.

### Q: Where can I download simdjson?
A: Simdjson is available on GitHub ([https://github.com/simdjson/simdjson](https://github.com/simdjson/simdjson)) and can also be installed via package managers like Gentoo (`dev-libs/simdjson`) and Ubuntu (`libsimdjson-dev`, `libsimdjson0`).

## Why It Matters
Simdjson addresses the growing need for high-performance JSON parsing in modern applications, particularly in big data and cloud computing environments. Traditional JSON parsers often struggle with large datasets due to their sequential processing nature. Simdjson overcomes this limitation by utilizing SIMD instructions, which allow multiple data elements to be processed simultaneously. This makes it a valuable tool for developers working with large-scale JSON data, such as log files, API responses, and database exports. By providing faster parsing times, simdjson helps reduce latency and improve the overall efficiency of data processing pipelines. Its cross-platform compatibility and open-source nature further enhance its adoption and integration into diverse software ecosystems.

## Notable For
- **SIMD Optimization**: First to leverage SIMD instructions for JSON parsing, significantly improving performance.
- **Cross-Platform Support**: Works across multiple operating systems, ensuring broad compatibility.
- **Open-Source License**: Released under the Apache License 2.0, promoting widespread adoption and modification.
- **Package Availability**: Officially packaged for major distributions like Gentoo and Ubuntu, simplifying installation.
- **GitHub Integration**: Hosted on GitHub, facilitating community contributions and version tracking.

## Body
### Overview
Simdjson is a high-performance JSON parsing library designed to accelerate the processing of JSON data. It is implemented in C++ and optimized using SIMD (Single Instruction Multiple Data) instructions, allowing it to parse JSON files faster than traditional libraries. The project was developed by Milo Yip and is distributed under the Apache Software License 2.0, ensuring it remains free and open-source.

### Development and Releases
Simdjson has undergone multiple releases since its inception. Notable versions include:
- **0.3.0** (2020-03-31)
- **0.3.1** (2020-04-02)
- **0.4.0** to **0.4.7** (2020-06-24 to 2020-07-17)

Each release introduces improvements and bug fixes, enhancing the library's performance and reliability. The project's source code is hosted on GitHub, where developers can contribute and track changes.

### Technical Features
- **SIMD Optimization**: Simdjson uses SIMD instructions to parse JSON data in parallel, significantly reducing processing time.
- **Cross-Platform Compatibility**: The library is designed to work across different operating systems, ensuring broad compatibility.
- **Package Management**: Simdjson is available as a package in Gentoo (`dev-libs/simdjson`) and Ubuntu (`libsimdjson-dev`, `libsimdjson0`), making it easy to install and integrate into projects.

### Community and Adoption
Simdjson has gained traction in the developer community due to its performance benefits. It is used in various applications where fast JSON parsing is crucial, such as big data processing and cloud services. The library's open-source nature and active development cycle contribute to its growing popularity.

### Future Directions
While the provided data does not detail future plans, the project's GitHub repository suggests ongoing development and community engagement. Users and contributors can expect continued improvements and updates to the library.

## References

1. [Source](https://api.github.com/repos/simdjson/simdjson)
2. [2025](https://github.com/EvanLi/Github-Ranking/blob/master/Data/github-ranking-2025-07-06.csv)
3. [Release 0.3.0. 2020](https://github.com/simdjson/simdjson/releases/tag/v0.3.0)
4. [Release 0.3.1. 2020](https://github.com/simdjson/simdjson/releases/tag/v0.3.1)
5. [Release 0.4.0. 2020](https://github.com/simdjson/simdjson/releases/tag/v0.4.0)
6. [Release 0.4.1. 2020](https://github.com/simdjson/simdjson/releases/tag/v0.4.1)
7. [Release 0.4.2. 2020](https://github.com/simdjson/simdjson/releases/tag/v0.4.2)
8. [Release 0.4.3. 2020](https://github.com/simdjson/simdjson/releases/tag/v0.4.3)
9. [Release 0.4.4. 2020](https://github.com/simdjson/simdjson/releases/tag/v0.4.4)
10. [Release 0.4.5. 2020](https://github.com/simdjson/simdjson/releases/tag/v0.4.5)
11. [Release 0.4.6. 2020](https://github.com/simdjson/simdjson/releases/tag/v0.4.6)
12. [Release 0.4.7. 2020](https://github.com/simdjson/simdjson/releases/tag/v0.4.7)
13. [Release 0.5.0. 2020](https://github.com/simdjson/simdjson/releases/tag/v0.5.0)
14. [Release 0.6.0. 2020](https://github.com/simdjson/simdjson/releases/tag/v0.6.0)
15. [Release 0.6.1. 2020](https://github.com/simdjson/simdjson/releases/tag/v0.6.1)
16. [Release 0.7.0. 2020](https://github.com/simdjson/simdjson/releases/tag/v0.7.0)
17. [Release 0.7.1. 2020](https://github.com/simdjson/simdjson/releases/tag/v0.7.1)
18. [Release 0.8.0. 2021](https://github.com/simdjson/simdjson/releases/tag/v0.8.0)
19. [Release 0.8.1. 2021](https://github.com/simdjson/simdjson/releases/tag/v0.8.1)
20. [Release 0.8.2. 2021](https://github.com/simdjson/simdjson/releases/tag/v0.8.2)
21. [Release 0.9.0. 2021](https://github.com/simdjson/simdjson/releases/tag/v0.9.0)
22. [Release 0.9.1. 2021](https://github.com/simdjson/simdjson/releases/tag/v0.9.1)
23. [Release 0.9.2. 2021](https://github.com/simdjson/simdjson/releases/tag/v0.9.2)
24. [Release 0.9.3. 2021](https://github.com/simdjson/simdjson/releases/tag/v0.9.3)
25. [Release 0.9.4. 2021](https://github.com/simdjson/simdjson/releases/tag/v0.9.4)
26. [Release 0.9.5. 2021](https://github.com/simdjson/simdjson/releases/tag/v0.9.5)
27. [Release 0.9.6. 2021](https://github.com/simdjson/simdjson/releases/tag/v0.9.6)
28. [Release 0.9.7. 2021](https://github.com/simdjson/simdjson/releases/tag/v0.9.7)
29. [Release 1.0.1. 2021](https://github.com/simdjson/simdjson/releases/tag/v1.0.1)
30. [Release 1.0.2. 2021](https://github.com/simdjson/simdjson/releases/tag/v1.0.2)
31. [Release 1.1.0. 2022](https://github.com/simdjson/simdjson/releases/tag/v1.1.0)
32. [Release 2.0.0. 2022](https://github.com/simdjson/simdjson/releases/tag/v2.0.0)
33. [Release 2.0.1. 2022](https://github.com/simdjson/simdjson/releases/tag/v2.0.1)
34. [Release 2.0.2. 2022](https://github.com/simdjson/simdjson/releases/tag/v2.0.2)
35. [Release 2.0.3. 2022](https://github.com/simdjson/simdjson/releases/tag/v2.0.3)
36. [Release 2.0.4. 2022](https://github.com/simdjson/simdjson/releases/tag/v2.0.4)
37. [Release 2.1.0. 2022](https://github.com/simdjson/simdjson/releases/tag/v2.1.0)
38. [Release 2.2.0. 2022](https://github.com/simdjson/simdjson/releases/tag/v2.2.0)
39. [Release 2.2.1. 2022](https://github.com/simdjson/simdjson/releases/tag/v2.2.1)
40. [Release 2.2.2. 2022](https://github.com/simdjson/simdjson/releases/tag/v2.2.2)
41. [Release 2.2.3. 2022](https://github.com/simdjson/simdjson/releases/tag/v2.2.3)
42. [Release 3.0.0. 2022](https://github.com/simdjson/simdjson/releases/tag/v3.0.0)
43. [Release 3.0.1. 2022](https://github.com/simdjson/simdjson/releases/tag/v3.0.1)
44. [Release 3.1.0. 2023](https://github.com/simdjson/simdjson/releases/tag/v3.1.0)
45. [Release 3.1.1. 2023](https://github.com/simdjson/simdjson/releases/tag/v3.1.1)
46. [Release 3.1.2. 2023](https://github.com/simdjson/simdjson/releases/tag/v3.1.2)
47. [Release 3.1.3. 2023](https://github.com/simdjson/simdjson/releases/tag/v3.1.3)
48. [Release 3.1.4. 2023](https://github.com/simdjson/simdjson/releases/tag/v3.1.4)
49. [Release 3.1.5. 2023](https://github.com/simdjson/simdjson/releases/tag/v3.1.5)
50. [Release 3.1.6. 2023](https://github.com/simdjson/simdjson/releases/tag/v3.1.6)