use through

Dominictarr pointed out some state errors, maybe something like

``` js
var split = require('split');
return split('\n', function (d) { return d.split(',') });
```

could work and be just as performant.

The issue names no files or tests; start at the parser's public entry point and compare its state handling with the proposed split-based snippet. Confirm equivalent CSV behavior and performance before considering the work done.

Written by the indexing model from the issue text.