[jsarch]

Can you clarify what you mean by "70-90% of the speed of generated C++"?

Suppose that the generated C++ takes 1.0 seconds. Does your implementation take 0.7-0.9s or 1.7-1.9s or something else?

[haberman]

If the generated C++ can parse 1MB/s, I can parse at 700-900kB/s. 70-90% of the speed, not the time. So 1.1-1.4 seconds, in your example.