Depends what your outland country is.. some are as long as inland.. and some outland countries are so fast!
Outland
http://www.cic.gc.ca/english/information/times/international/05-fc-spouses.aspInland
You would look at CPC Vegreville
First step is 6 months if approved.. you can get an open work permit which you apply for at the same time as your application
Than if you are approved another year usually
If you are not approved it gets transferred to a local office pending furthur investigation and some offices have a delay of another 12-24 months.. so it can be long.. and if you are not approved in the first step you can't work.
So depending on your country for your outland process some you can get in as little as 3 months.. but if you are requested for an interview you would have to fly out to that office. There would also be a chance that you wont get accepted back into Canada until your process is finished. But if you don't have an interview it won't be a problem.
Also the main reasons for being called into an interview is to furthur question your relationship with your spouse.. They sometimes believe the marriage to not be genuine. You must supply them with lots of evidence to show it is genuine.
Side note I just noticed you are from Pakistan so Islamabad takes between 6-13 months.
So both sides have pros and cons.. best of luck to you..