After moving to Appium v1.3.1 tests duration increased

Earlier we were using Xcode 5, iPhone 5, iOS 7.1 and Appium 0.15-018, the duration of running tests was about 1,5 hours, now we moved to Appium 1.3.1, XCode 6.1, iPhone 5s, iOS 7.1 and the duration increased to 4 hours.
We suspect that this happens because searching elements with help of locators takes too much time, or is there another reason?

We faced the same problem. Using the latest version of software.
Can anybody help please?