Comment by ac42

> Instead, this feature should be implemented as part of some safe parser generator

Which safe parser generator would you recommend for writing a protobuf parser (preferably one that yields at least 25% of the throughput claimed by the OP)?

Full disclosure: I believe there is no such thing, and if what you're asking the OP is to write one, it would likely benefit greatly from generating code that leverages tail recursion. Yeehaw!