Comment by helloycombinat

> When do you use packrat parser vs LALR vs LL? Good luck hiring an engineer with advanced compiler courses knowing any of this

Honestly, I have no idea why you would want any of those. Can you explain in a few sentences?

I written a parser before and it was faster than everything I used that does the same thing or similar. And I haven't had any professional or teachers teach me parsing

I once wrote a json parser in .NET. It was faster than literally everything I tried but I already know it can't touch simdjson and I haven't compared it to the new dotnet parser but I imagine they do it faster. I'm actually confused how people write such shitty parsers when I barely know what I'm doing. Like are they using a link list or revisiting characters multiple times to parse? (I think two visits is acceptable. One to find the end of a number and another pass to convert the number to value although I'm sure it's not hard to do one pass)