Deep Work: A welcome kick in the butt

The Pomodoro/25 minute approach your OP is advocating I think requires that you write software a different way. You can't write big source files that reference hundreds of data structures. You can't write modules that require other modules to be structured just-so in order for things to work. You can't throw hundreds of views, models, etc, into a big repo and let them all call each other. You have to spend time constantly creating new interfaces, shuffling responsibilities around, and generally keeping your codebase such that no particular module requires you to reason much about the modules other than its few neighbors.

Frameworks tend to discourage this way of programming, because they want to give you a small set of primitives and have you fit everything into one of those boxes.

But if you can manage it, by avoiding frameworks, learning about all of the component systems available to you, and getting comfortable writing your own middleware, the 25 minute requirement can actually help you, since if you find a problem that you can't wrap your head around in 25 minutes, you know your next task is to move some module boundaries around so that you can get a clearer view of the problem.

Many software teams choose to operate on the bleeding edge of "could a very smart, full-time programmer with a lot of coffee understand what's happening after poking around for a couple hours?" rather than "does this interface create a region of the codebase which can be independently understood?"

Is that true? Based on my own anecdotal evidence, I'd say it is, but I'm a sample size of 1...

- There's the technician skill, where you poke at your react elements and fiddle with CSS until it looks like the mockup the designers gave you. Every 20 minutes you need to trawl through stackoverflow to find the exact way to use flexbox to get the layout you want, or to work around a bug in safari. When you're done you do some refactoring and feel good about it and call it a day.

- And there's the engineering skill, where you scratch your head and read wikipedia & some academic papers until you know what search terms to use. And then you realise that really you want something like an invertible bloom filter, except there's some small % chance it will fail each time you query it so you need a fallback mechanism. Except then you realise that fallback mechanism will have O(n^2) - but if you use a slightly different data structure then it'll become O(nlogn + klogk). But that requires modifications to the bloom filter itself and a funky network protocol, so you write that.

If the only programming you do is the first type, thats fine. Thats where we all start. Thats the majority of work out there. 25 minute pomodoros are probably fine for that. I like pair programming, because I can stay focussed better with a friend. Sometimes I listen to excited music while I work.

But all the work I'm most proud of is the second type. I wrote a streaming incremental compiler for a 2d air pressure based language. I got 90% of the way to making an OT algorithm work for arbitrary JSON structures (including object move), only to realise that it absolutely needs conflict markers so I put it down for awhile. I wrote a nodejs server from scratch thats compatible with google's browserchannel protocol - basically reimplementing TCP in the process. I implemented a PEG parser - and I'm going to need a session like this to add the ability to pass realtime streaming text updates through the parser.

These sorts of things can't be reduced to 25 minute context increments. They just need too much mental state. Maybe once they're done they can be broken down into pieces that you could explain in 25 minute chunks. But figuring out that some particular abstraction is the right one requires fitting the entire system together in your head, so you can turn it around. And thats a spacing out in the shower followed by a day with a whiteboard kind of task.

I guess the way I see it is that large amounts of uninterrupted time doesn't simply make it easier to do hard engineering. It makes it possible. Is that what the book refers to as deep work? If so then I think pomodoros are an anathema to that.