bfetch

A lightweight, ultra-optimized system fetch tool written in C.

bfetch is designed for absolute maximum speed. It utilizes low-level techniques like inline assembly and memory mapping to achieve performance levels that exceed even purpose-built "fast" tools.

Features

• Blazing Performance: Execution time is typically ~2ms (up to 55x faster than fastfetch).
• Accurate Memory: Directly parses /proc/meminfo to calculate available memory correctly, excluding cache.
• Instant GPU Detection: Scans /sys/class/drm for cards instead of traversing the entire PCI bus, using mmap for instant model lookup.
• Buffered Output: Builds the entire output in memory and flushes with a single write() syscall.
• Universal Package Counting:
  • Nix: Deep manifest scanning via mmap substring search.
  • Pacman: Optimized directory entry counting.
  • Flatpak & Snap: Native filesystem-based counting.
• Zero-Copy Architecture: Minimal memory allocations and no subprocess spawning.
• Aesthetic: Custom professional ASCII art for CachyOS, Gentoo, and Bedrock Linux.

Usage

# Build (defaults to fast mode)
make

# Run
./bfetch

# Show Help
./bfetch --Help

Comparisons

Tool	Approx. Time	Approach
bfetch	~0.002s	ASM + DRM Lookup + Direct I/O
fastfetch	~0.10s	Optimized C / libpci
neofetch	~0.80s	Shell script

Technical Implementation

• CPU: Uses cpuid inline assembly to fetch the processor brand string.
• GPU: Direct /sys/class/drm/card* lookup to identifying vendor/device IDs, then memory-maps pci.ids for model name resolution.
• Memory: Parses /proc/meminfo to calculate Used = Total - Available without sysinfo() syscall overhead.
• I/O: Combined /etc/os-release read for both distro name and system type detection.
• Packages: optimized recursive directory counting and memory-mapped manifest scanning.

Installation

From Source

git clone https://github.com/Mjoyufull/bfetch.git
cd bfetch
make
./bfetch

Nix

nix run github:Mjoyufull/bfetch

License

AGPL License