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loc is a tool for counting lines of code. It's a rust implementation of cloc, but it's more than 100x faster. There's another rust code counting tool called tokei, loc is ~2-10x faster than tokei, depending on how many files are being counted.

I can count my 400k file src directory (thanks npm) in just under 7 seconds with loc, in a 1m14s with tokei, and I'm not even willing to try with cloc.

Counting just the dragonflybsd codebase (~9 million lines):

  • loc: 1.09 seconds
  • tokei: 5.3 seconds
  • cloc: 1 minute, 50 seconds

Installation

There are binaries available on the releases page, thanks to the wonderful rust-everywhere project and travisci. For anyone familiar with Rust there's cargo install loc. If you want to install Rust/Cargo, this is probably the easiest way: https://www.rustup.rs/.

Windows

loc should now compile on Windows, but you can also run it under Windows using linux emulation:

You can run `loc` on Windows 10 Anniversary Update build 14393 or later using the [Windows Subsystem for Linux](https://msdn.microsoft.com/de-de/commandline/wsl/install_guide?f=255&MSPPError=-2147217396). Simply download the Linux distribution from the [releases page](https://github.com/cgag/loc/releases), and run it in `bash` using a WSL-compatible path (e.g. `/mnt/c/Users/Foo/Repo/` instead of `C:\Users\Foo\Repo`).

Known Issues

Fortran has a rule that comments must start with the first character of a line. I only check if it's the first non-whitespace character of a line. I don't know how often this is a problem in real code. I would think not often.

Comments inside string literals: You can get incorrect counts if your code has something like this:

x = "/* I haven't slept \ 
for 10 days \
because that would be too long \
*/";

loc counts the first line and last lines correctly as code, but the middle lines will be incorrectly counted as comments.

Supported Languages

  • ActionScript
  • Ada
  • Agda
  • ASP
  • ASP.NET
  • Assembly
  • Autoconf
  • Awk
  • Batch
  • Bourne Shell
  • C
  • C Shell
  • C/C++ Header
  • C#
  • C++
  • Clojure
  • CoffeeScript
  • ColdFusion
  • ColdFusionScript
  • Coq
  • CSS
  • CUDA
  • CUDA Header
  • D
  • Dart
  • DeviceTree
  • Erlang
  • Forth
  • FORTRAN Legacy
  • FORTRAN Modern
  • GLSL
  • Go
  • Handlebars
  • Haskell
  • Hex
  • HTML
  • Idris
  • INI
  • Intel Hex
  • Isabelle
  • Jai
  • Java
  • JavaScript
  • JSON
  • Jsx
  • Julia
  • Kotlin
  • Lean
  • Less
  • LinkerScript
  • Lisp
  • Lua
  • Make
  • Makefile
  • Markdown
  • Mustache
  • Nim
  • Objective-C
  • Objective-C++
  • OCaml
  • Oz
  • Pascal
  • Perl
  • PHP
  • Plain Text
  • Polly
  • Prolog
  • Protobuf
  • Pyret
  • Python
  • Qcl
  • QML
  • R
  • Razor
  • reStructuredText
  • Ruby
  • RubyHtml
  • Rust
  • SaltStack
  • Sass
  • Scala
  • SML
  • SQL
  • Stylus
  • Swift
  • Tcl
  • TeX
  • Toml
  • TypeScript
  • Tsx
  • UnrealScript
  • VimL
  • Wolfram
  • XML
  • Yacc
  • YAML
  • Z Shell

Attributions

This project contains code from Tokei by Aaronepower and ripgrep by BurntSushi.