fastgrep - a faster "grep -r"

A utility similar to grep -r ... but focused on raw speed and utilization of system resources. This tool is useful for quickly scanning large directories for files containing a specific string.

The intro gif is fastgrep scanning the entire, un-indexed, 1.15.1 craftbukkit sources on a Kali Linux install running on an 4-core laptop CPU (the i7-8550U @ 1.8GHz) for the string "createInventory". That is around 1 million lines of code searched in under 100ms. The same scan would take grep several minutes.

$ cd ~/craftbukkit-1.15.1-src
$ cloc .
-------------------------------------------------------------------------------
Language                     files          blank        comment           code
-------------------------------------------------------------------------------
Java                          8099         200332           4926         959246
-------------------------------------------------------------------------------
SUM:                          8099         200332           4926         959246
-------------------------------------------------------------------------------

This functionality can be very useful for developing or modding large, documented, codebases (e.g. open-source or reverse engineered games, operating systems, etc.).

IntelliJ IDEA Tool Integration

For more info see this.

Building

Requirements

• Building: cmake, gcc
• Running: argp, pthread

Installing from binary release - Linux (Debian/Ubuntu)

curl -fsSL https://raw.githubusercontent.com/divisionind/fastgrep/master/get_fastgrep.sh -o get_fastgrep.sh
sudo sh get_fastgrep.sh

Installing from source - Linux

1. Clone repo git clone --recursive https://github.com/divisionind/fastgrep.git
2. Enter directory cd fastgrep
3. Build locally and install sudo sh install.sh

NOTE: The install script assumes apt as the package manager. If you are running a different package manager, install the requirements and remove that section of the install script.

Windows

1. Download the latest windows installer from the releases page
2. Run the installer, make sure you select Add fastgrep to the system PATH for all users, complete installation

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