> I don't get it. Wouldn't going from 1 second to 0 seconds add the same amount of money to the yearly profit as going from 2 seconds to 1 second did? Namely, $1M

Of course the joke was silly. But perhaps I should have provided some context. We were making industrial automation software. This stuff runs in factories. Every saved second shrinks the manufacturing time of a part, leading to increase of the total factory output. When extrapolating to abusrd levels, zero time to manufacture means infinite output per factory (sans raw materials).

Unfortunately, there wasn't a single bottleneck. A bunch of us, not just me, worked our asses off improving performance by a little bit in several places. The compounded improvement IIRC was satisfactory to the customer.

Fun story time!

Early in my career as a software engineer, I developed a reputation for speeding things up. This was back in the day where algorithm knowledge was just as important as the ability to examine the output of a compiler, every new Intel processor was met with a ton of anticipation, and Carmak and Abrash were rapidly becoming famous.

Anyway, the 22 year old me unexpectedly gets invited to a customer meeting with a large multinational. I go there not knowing what to expect. Turns out, they were not happy with the speed of our product.

Their VP of whatever said, quoting: "every saved second here adds $1M to our yearly profit". I was absolutely floored. Prior to that moment I couldn't even dream of someone placing a dollar amount on speed, and so directly. Now 20+ years later it still counts as one of the top 5 highlights of my career.

P.S. Mentioning as a reaction to the first sentence in the blog post. But the author is correct when she states that this happens rarely.

P.P.S. There was another engineer in the room, who had the nerve to jokingly ask the VP: "so if we make it execute in 0 seconds, does it mean you're going to make an infinite amount of money?". They didn't laugh, although I thought it was quite funny. Hey, Doug! :)

May I ask: why not use Synology's own photo stack? The web UI is pretty good, the iPhone app is great, it runs locally without depending on Synology servers, and does have face recognition and all other features.