What's the length limit for the “text” field on HN's submission page?

I am the developer of HACK client for iOS and MacOS for HN and need this info for it.

I am aware that the HN titles have a length limit of 80 characters. Was able to figure it out using the submission page as well as multiple discussions on it. And the HTML of the page has this function too:

    function tlen(el) { var n = el.value.length - 80; el.nextSibling.innerText = n > 0 ? n + ' too long' : ''; }

I am curious about the same length limit for the "Text" post. I don't see a tlen function in that field's HTML. What's the limit of that field - both for posts as well as comments/replies?