I have a couple of these. The big ones (Klymit Static V insulated, Thermarest insulated, and thermarest normal neoair) all require 16-20 breathes to inflate. The smallest, a Klymit Inertia(?) weighs only 8oz, and inflates in about 10 breathes, but it's thinner and only designed to support parts of you. I don't like doing any of it manually.
I've seen people use an air bag, and that seems better.
I recently got a notice from Amazon that a 3oz USB-rechargable pump was on sale down from $30-something to $23, so I bought it. Supposed to be good for 5-6 inflations. We'll see.