Bat vs Fd

Bat and Fd are both popular developer tools tools. This page compares their internal architecture, technology stack, data flow patterns, and system behavior — based on automated structural analysis of their source code. They share 1 technologies including clap.

sharkdp/bat

58,379

Stars

Rust

Language

Components

0.0

Connectivity

sharkdp/fd

42,613

Stars

Rust

Language

Components

0.0

Connectivity

Technology Stack

Shared Technologies

clap

Only in Bat

syntect git2 console encoding_rs minus bincode globset

Only in Fd

ignore regex crossbeam-channel lscolors tikv-jemallocator aho-corasick jiff

Architecture Layers

Bat (4 layers)

CLI Application

Parses command-line arguments, manages configuration files, handles input discovery (files/stdin), and orchestrates the display pipeline through the Controller

Core Library

Provides the PrettyPrinter API and Controller that coordinate syntax highlighting, git integration, output formatting with decorations (line numbers, headers), and paging decisions

Asset Management

Loads, caches, and provides access to syntax definitions (from syntect) and color themes, with build-time compilation of bundled assets and runtime loading of user themes

Output Processing

Handles the final rendering pipeline including ANSI escape sequence processing, line wrapping, paging integration (less/more), and terminal capability detection

Fd (5 layers)

CLI Interface

Parses command-line arguments using clap, validates options, and converts them into a Config struct that drives all other components

Configuration & Validation

Creates search patterns from user input, compiles regex patterns, builds ignore rules from gitignore files, and validates file type filters

Parallel Walker

Traverses directory trees using multiple threads via the ignore crate, applies ignore rules, and sends discovered paths to processing channels

Filtering Pipeline

Applies pattern matching, file type filters, size constraints, time constraints, and owner filters to determine which paths should be included in results

Output & Execution

Formats matched paths using templates, applies color schemes, generates hyperlinks, or executes user-specified commands on each result

Data Flow

Bat (8 stages)

Parse command arguments and load configuration
Discover and validate input files
Load syntax highlighting assets
Open and inspect file contents
Map file to syntax definition
Apply syntax highlighting
Add line decorations and formatting
Output to terminal or pager

Fd (5 stages)

Parse CLI arguments into configuration
Walk filesystem in parallel threads
Filter paths through constraint pipeline
Execute commands on matched paths
Format output with colors and templates

System Behavior

Dimension	Bat	Fd
Data Pools	3	3
Feedback Loops	2	0
Delays	3	3
Control Points	4	5

Code Patterns

Unique to Bat

lazy asset loading builder api multi-source configuration input abstraction

Unique to Fd

parallel pipeline lazy caching template substitution builder configuration

When to Choose

Choose Bat when you need

Unique tech: syntect, git2, console
More detailed pipeline (8 stages)

View full analysis →

Choose Fd when you need

Unique tech: ignore, regex, crossbeam-channel
Streamlined pipeline (5 stages)

View full analysis →

Frequently Asked Questions

What are the main differences between Bat and Fd?

Bat has 8 components with a connectivity ratio of 0.0, while Fd has 9 components with a ratio of 0.0. They share 1 technologies but differ in 14 others.

Should I use Bat or Fd?

Choose Bat if you need: Unique tech: syntect, git2, console; More detailed pipeline (8 stages). Choose Fd if you need: Unique tech: ignore, regex, crossbeam-channel; Streamlined pipeline (5 stages).

How does the architecture of Bat compare to Fd?

Bat is organized into 4 architecture layers with a 8-stage data pipeline. Fd has 5 layers with a 5-stage pipeline.

What technology does Bat use that Fd doesn't?

Bat uniquely uses: syntect, git2, console, encoding_rs, minus. Fd uniquely uses: ignore, regex, crossbeam-channel, lscolors, tikv-jemallocator.

Explore the interactive analysis

See the full architecture maps, code patterns, and dependency graphs.

Bat Fd

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Compared on April 20, 2026 by CodeSea. Written by Karolina Sarna.