I didn’t look real hard at it, but my first impressions were that the API didn’t seem that friendly, and the documentation/tutorial wasn’t that illuminating. I tried reading through the source code a bit, because I was curious how you implemented the parser, but had a hard time finding my way around. I never did find where the actual logic for the parser started. So I’ll admit that to some extent my library was born out of Not Invented Here, but I was more interested in the usability aspect than performance, at least initially.
And I will say that rojff is fast enough to be usable, if not necessarily the fastest.