Depends on the application. If submitted application is complete and VO was able to verify the submitted documents, then decision will come out soon. However, if incomplete or VO cannot verify immediately, then there will be a delay in the decision.
Each case is unique. Some applicants here got their approval in just a few days. While some, including me, got the approval in just a month. And yet others got theirs after several months. Same thing with rejection.
The official IRCC website will only give you the average estimated processing time: