clessg / eslint_d.js

Makes eslint the fastest linter on the planet

eslint_d

Makes eslint the fastest linter on the planet.

"But eslint is pretty fast already, right?"

Yes, it's actually super fast. But the node.js startup time and loading all the required modules slows down linting times for a single file to ~700 milliseconds. eslint_d reduces this overhead by running a server in the background. It brings the linting time down to ~160 milliseconds. If you want to lint from within your editor whenever you save a file, eslint_d is for you.

Install

This will install the eslint_d command globally:

$ npm install -g eslint_d

Usage

To start the server and lint a file, just run:

$ eslint_d lint file.js

On the initial call, the eslint_d server is launched and then the given file is linted. Subsequent invokations are super fast.

Commands

Controll the server like this:

$ eslint_d <command>

Available commands:

• start: start the server
• stop: stop the server
• status: print out whether the server is currently running
• restart: restart the server
• lint <file1> <file2> ...: lint one or more files. The eslint engine will be created in the current directory. If the server is not yet running, it is started.

eslint_d will select a free port automatically and store the port number is ~/.eslint_d_port.

Editor integration

If you're a vim user and have the syntastic plugin installed, download plugins/eslint_d.vim and save it in ~/.vim/bundle/syntastic/syntax_checkers/javascript/.

If you're using eslint_d in any other editor, please tell me!

Moar speed

If you're really into performance and want the lowest possible latency, talk to the eslint_d server with netcat. This will also eliminate the node.js startup time.

$ echo '. file.js' | nc localhost `cat ~/.eslint_d_port`

This runs eslint in under 50ms!

Compatibility

• 1.0.0: eslint 1.4+

License

MIT