Is the technology of O-R mapping mature?

I have heard more than once that the technology of O-R ing is already very mature. Is that true?

Previously I told people that I want to optimize the existing O-R Mapping engine, improve speed, friends told me that O-R mapping is a very mature technology, there is no good research. I did not refute that when I found a better way to optimize the existing O-R mapping and improve performance several times later, another friend knows this afterwards, telling me, o-R mapping is a very mature technology, you can increase the speed of several times, the original design must be very bad.

In my opinion, their ideas are incorrect. O-R ing has been a problem, that is, speed, this problem is not resolved before, it cannot be said that the O-R mapping technology has been mature. O-R mapping also has another problem, is the ease of use. Entity Bean performs poorly in terms of performance and ease of use, and hibernate does not. I heard that toplink performs well, but it should not be too good. I have read some examples of toplink and think its interface is not intuitive.

Now the product of O-R mapping is in the Warring States period. In Xu shaochun's words, all of them are monkeys, and there is no such thing as King Kong ,...

I hope to make some breakthroughs in this respect and finally create a King Kong !!