> Locking and unlocking a door two or three times a day adds up to a considerable amount of wasted time over the course of years Micro-optimizations are rarely

> Locking and unlocking a door two or three times a day adds up to a considerable amount of wasted time over the course of years Micro-optimizations are rarely useful in terms of software development or in real life (unless you're at considerable scale which is statistically unlikely in both cases). Granted I can't know for sure how long it takes you to lock or unlock a door. Going from my own experience locking and unlocking a door, combined, takes about 1-4 seconds depending on if I'm entering or leaving. So let's take the most (4 seconds). Let's say I unlock and lock 3 times a day (a busy day but again taking the highest numbers here). So that's 4,380 seconds (73 minutes) used per year at the maximum time. So yes it adds up but saving the 12 seconds per day wouldn't make me more productive that day (it's not like you gain that 73 minutes in a useful chunk of time) and statistically keeps myself, my family and our stuff safer. So yeah I get the convenience factor but I don't get the whole "wasted time" piece. Certainly depending on where you live it may be unnecessary but another thing to keep in mind is there are always times for firsts (so just because your area may be historically crime free doesn't mean it'll stay that way). Perhaps I'm just too paranoid but something so small seems fine to me :)