Works on OS X, but seriously lagging to the extent of not usable

[x-ji]

It works on OS X with homebrew build, however it seems that inserting each character in FF takes about 1 second, making it not usable. Not sure if somebody knows the issue is, or would be able to come up with a fix to it, now that the project is no longer maintained by the original author.

[lukeyyang]

also, the significantly long wait between the first key stroke and the first appearance of characters.

[aandrieiev]

I noticed a lag in the text fields which are highly JS'ed (like Gmail compose window), while others (including this, where I'm writing this comment) work with almost immediate feedback.