I have read roadmap.md, v8worker2 and jsconf.pdf to understand deno's architecture.
after read, I have some questions and want to check my understanding.
Questions.

thanks to read foolish questions.
1) Yes 2) Yes 3) Yes. Dispatcher was set of routines in the prototype implementation which doesn't exist yet in the rewrite.
There are other details that we haven't worked out yet that aren't described in the above figure. Example: whether to dedicate a thread for V8 or use a single threaded Node-like design (you can see some discussion of this in #301).
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1) Yes 2) Yes 3) Yes. Dispatcher was set of routines in the prototype implementation which doesn't exist yet in the rewrite.
There are other details that we haven't worked out yet that aren't described in the above figure. Example: whether to dedicate a thread for V8 or use a single threaded Node-like design (you can see some discussion of this in #301).