Of course (!) on most TDs my saw runs between cuts, chain brake on. The time between cuts is less than thirty seconds, often more like five or ten seconds. The chainbrake plus the operator presence throttle lock out make most issues of unintended acceleration moot. Even if your chainbrake got disengaged it would take the conspiracy of two twigs to make the saw rev up, one to cleverly depress the lock-out and one to manage the throttle. (The throttle lock-out is working on your saw, isn't it?) I look at what I am hanging my saw into, if its clear near my hip, I let it idle. Why not? If it looks like the tree will make my next cut 60 seconds or more away, I'll shut it off, but just because I'm not a fan of two-stroke smoke.
If I'm pruning, the chainsaw is usually only for stubs, if I take it up at all. It hangs near the center of the tree, if I want it. I get a better cut from a sharp handsaw, and I can more clearly hear myself singing perverted lyrics to old Stones and Beatles tunes.
On any drop start, I snug the pull cord until the dogs get a grip and I can feel the engine is up against a compression, then pull smoothly through. The compression bump can be felt even with the de-comp engaged. Better on my joints and better for the saw. I see a lot of guys just yanking on pull-cords with no mechanical sympathy, not for the saws mechanisms nor their own. The abuse will tell, but the saw can be fixed for a couple of bucks, elbows are not so cheap to come by.
RedlineIt