[Tails-dev] Quicker memory erasure

Hello devs,

today I used tails for the first time. Amazing work! But the shutdown took quite a while.. I was running it on my laptop with 16 gigs of ram. Erasing all this seems pretty time waisting to me. Wouldn't it be better to log all used memory addresses and clear only those which really were used?

Thanks for your work anyway!

Morosko