dragonbox ☆

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Description:
Reference implementation of Dragonbox in C++

Type: Formula | Latest Version: 1.1.3@0 | Tracked Since: Dec 17, 2025

Links: Homepage | formulae.brew.sh

Category: Developer tools

Tags: c++ library formatting floating-point header-only

Install: brew install dragonbox

About:
Dragonbox is a C++ library providing a reference implementation for converting binary floating-point numbers to decimal strings. It achieves this with round-trip guarantees and optimal performance, often outperforming existing standard library implementations. The library is header-only and focuses on providing the fastest and most accurate method for number formatting.

Key Features:

Header-only C++ library for easy integration
Provides shortest decimal representation with round-trip guarantees
Optimized for high performance, often faster than standard library implementations
IEEE 754 compliant

Use Cases:

High-performance logging systems requiring fast number formatting
Data serialization and export tools
Scientific computing applications needing precise number output

Alternatives:

ryu – Ryu is a similar fast floating-point to string algorithm, with Dragonbox often cited as a successor or competitor with specific optimizations.
std::to_chars – The C++17 standard library function, which Dragonbox aims to outperform in speed while maintaining correctness.

License: BSL-1.0 OR (Apache-2.0 WITH LLVM-exception)

Bottles available for: arm64_tahoe, arm64_sequoia, arm64_sonoma, arm64_ventura, sonoma, ventura, arm64_linux, x86_64_linux

Version History

Detected	Version	Rev	Change	Commit
Nov 24, 2024 3:04pm		0	VERSION_BUMP	4f5a8790
Nov 24, 2024 9:48am		0	NEW	760f3227