WATIR 5.0.0 is entering text value in textbox slower than WATIR 3.0.0

I was using Ruby 1.8.7 and WATIR 3.0.0 and now I have changed to Ruby
2.0.0 and WATIR 5.0.0, the problem I have here is, It’s entering the
value in textbox very slowly compared to WATIR 3.0.0, What is the
problem here? how would I resolve this problem? Can anyone suggest me?
Or is it a problem in WATIR 5.0.0