Jackson stream parser position

Question

I am building a tool to parse huge JSON around 1GB. In that logic, I am creating JsonParser object keep reading till it reaches expected JsonToken . Now I create another JsonParser (called child), which should be starting from previous JsonParser token position without much overhead. Is there a way to do that in JasonParser API for that? I am using skipChildren() , which is also taking time in my scenario.

Answer 1

You can try to call releaseBuffered(...) to get the data that are read but not consumed by the parser, and then prepend these data to the input stream ( getInputSource() ) to somehow parse the resulting stream (one way to do this might be to use an input stream that supports marks when constructing the parser).

However, since you're already using a stream based API, you probably won't get better performance than with skipChildren() .