Figure out if pushbackreader optimization by @chrisn helps

[borkdude]

Port by @slipset: https://github.com/slipset/data.json/commits/with-char-reader
@chrisn: https://github.com/cnuernber/charred/blob/master/java/charred/CharReader.java#L82

I don't know if clojure code needs to push back more than one character, I guess we'll figure out by trial and error, so let's be very careful before we use this in anything production.

[slipset]

That's the wrong chrisn, you're looking for @cnuernber

[borkdude]

Whoops, sorry :)

[chrisn]

👋 😕