Qt5 - QJSEngine for module architekture, debugging

[dorny]

Hi, i'm looking for advice...

I'm going to use QJSEngine for module architekture inside own (http) server .
Each request is processed in new thread with new QJSEngine instance.
QJSEngine instance evalutes cached javascirpt file, process request and generate response.

Questions:

1. Is QJSEngine good choice?
2. Will be there some noticeable performance issue with this architecture (new QJSEngine in each request) ?
3. It's possible to debug javascript inside QJSEngine?

Thanks