Just wanted to share my experience for sponsoring my wife who I married in April 2015
June 25, 2015: Sponsorship application sent to CPC-M
June 26, 2015: Sponsorship application received by CPC-M
July 29, 2015: Email from CPC-M advising sponsorship application processing begins
September 1, 2015: Online file updated stating permanent residence application processing begins in Singapore office
September 9, 2015: Email from High Commission of Canada in Singapore stating processing of PR application has started
October 5, 2015: Email from High Commission of Canada in Singapore summoning my wife to send her Bangladeshi passport for Canadian PR Visa stamp
October 16, 2015: Parcel from High Commission of Canada in Singapore received containing our supporting documents
October 29, 2015: My wife picked up her Bangladeshi passport with Canadian PR Visa stamp from VFS Dhaka
Whole process took 4 months plus a few days from start to end, got a lot of help by using an immigration consultant (a Bangladeshi himself) to help fill in the forms and ensure all supporting documents were included. Will be bringing her to Canada in January in'sha'Allah.