Firstly benchmarking questions that take the form, "Which of these two things are fastest" are almost always closed, this is because only you can tell. Environmental factors make up such a huge part of code execution that there is no way for another party to objectively benchmark what would be fastest on your machine.
Furthermore, if the code is already written then it's something that the person asking can do themselves. Asking someone else to do it is fairly lazy and is pretty localized. There's no guarantees that what other people do will be relevant to others. It may, in fact, be incorrect for others, which is not a good outcome.
It doesn't seem like this is what you were asking. You commented:
I was asking for performance comparison of the most common regular expression engines
This is, firstly, a recommendation question, see the blog post Q&A is Hard, Let’s Go Shopping!. What defines "most common", did you define it? Next, "performance" needs to be defined, did you mean:
- Speed of execution. In batch? Individually?
- Amount of resources used?
- Many others
Lastly, it doesn't take into account any of my first points. Even assuming someone works out what the most common regular expression engines are, then decides what performance means the results may be completely wrong for your environment.
In essence, this is a recommendation question, which, under the new system of close reason, will be off topic.