Firstly I was surprised my manual does not say anything regarding warm ups, just starting procedure. However stop to think for a second, would you start your car or motorbike and rev the hell out of it before it was warmed up? Then don't do it to a saw, an extremely high revving with delicate parts machine. Inards have to heat up and take their operating size and shape, they need lubrication and at operating temp the machine will be using the proper air/fuel mix etc. (Stihl M-tronic counters this)
I did a quick google search to see what advice was floating out there and funny, there are plenty of forum Qs all asking the same thing. The first advice site I bothered to click on was -
https://www.gardentoolexpert.com/does-a-chainsaw-need-to-warm-up/And to be fair it makes some valid points as above but also interestingly it talks about air temperature/cold weather use, which adds a dimension to the start up for those not just with a cold machine but a cold environment adding to that.....even more so getting a machine out of cold winter storage at below zero and actually having to warm the thing up before even starting!
So from all the comments made by people, consensus is yes give it some warm up time. This varies with how cold the environment is around you too, if its colder give it more time (don't start a frozen machine fullstop).
Give it some time on idle (use this time to adjust your helmet, fasten gloves wipe your nose, scratch your ass etc.....once last check on the safety of your work area) and do not rev it up when on chain brake (Stihl manual). When it has had a moment or 3 on idle, blip it up do not go full throttle. If it speeds up unhindered on the blips (i.e. does not bog down or hesitate) then proceed to test full speed. You can add this full speed test into your oil fling test to save time if you are bothered. Then cut some **** up!