captplaystation
Assuming the cabin diff was near zero then, at 1,000fpm it would take 7 or 8 mins to repressurise the cabin to where it should be. You have no idea of what is going on in the cabin (eg masks not dropped) and you are up there with no more 02 for the pax and cabin crew. To avoid alarm and inconvenience? And to possibly deservedly lose your job.
To my mind the best way is for the FO to carry out the sudden depressurisation checklist while the captain switches on the igniters, sets the lower FL in the altitude window and checks the msa - all to save vital seconds.
The sudden depressurisation checklist needs to be gone through but it is really for an immediately containable pressurisation glitch and to prepare the aircraft for the emergency descent.