I think no one can say for sure when, but CIC says that all applications in May will have results before September.
I joined a group of applications on telegram,
https://t.me/Canadapprgrp, "Canada visa timelines", where people update their results. Yesterday August 4, most PPR is May 11 file lodged, many from Apr and Mar, some from June and 1 from July (yes OMG). Hope CIC will keep their promises and clear all May applications in Aug. I applied on June 02 though