Client crash; "calculating differences" on restart

So I'm in a lobby. My client locks up. Here's what happens next:

• In most games I'd just restart, but I don't want a queue dodge penalty, so I don't.
• I wait until I think the lobby has probably started loading
• I close client
• When I reopen, I get "calculating differences" and have to wait until the patcher figures out it's complete programmatic lineage through all its generations, or whatever the fuck it does
• It takes me a long, long time to get to lane

Is there anything we can do about that? I've gotten "calculating differences" more than once when I've had to restart a crashed client, usually from loading screen. It's an automatic full tilt in a ranked game.