libeatmydata ☆

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Description:
LD_PRELOAD library and wrapper to transparently disable fsync and related calls

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Developer tools

Tags: filesystem performance development ld-preload testing

Install: brew install libeatmydata

About:
Libeatmydata is an LD_PRELOAD library that intercepts filesystem calls to disable fsync, fdatasync, sync, and sync_file_range. This bypasses physical disk writes, allowing applications to run significantly faster at the risk of data loss. It includes a wrapper script to easily launch commands without manual environment variable configuration.

Key Features:

Transparently intercepts and nullifies fsync-related calls
Significant performance gains for I/O-heavy workloads
Includes a 'eatmydata' wrapper for easy execution
Low overhead and simple configuration

Use Cases:

Accelerating large software compilations and test suites
Speeding up database initialization or bulk loading in development environments
Improving performance of package managers during installation

Alternatives:

none – Libeatmydata is the standard tool for this specific purpose; manual LD_PRELOAD is the only alternative.

Version History

Detected	Version	Rev	Change	Commit
Sep 14, 2025 3:20am		0	VERSION_BUMP	7f7d93fa