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Joel Spolsky beskriver det så här:

programming is the kind of task where you have to keep a lot of things in your head at once. The more things you remember at once, the more productive you are at programming. A programmer coding at full throttle is keeping zillions of things in their head at once: everything from names of variables, data structures, important APIs, the names of utility functions that they wrote and call a lot, even the name of the subdirectory where they store their source code. If you send that programmer to Crete for a three week vacation, they will forget it all. The human brain seems to move it out of short-term RAM and swaps it out onto a backup tape where it takes forever to retrieve. ¹

²

or you can be a bit more blunt, like Kathy Sierra

Referenser

¹. Human Task Switches Considered Harmful ↩

². Is Multitasking More Efficient? Shifting Mental Gears Costs Time, Especially When Shifting to Less Familiar Tasks (American Psychological Association) ↩

³. Om myndigheter reste som de bygger IT ↩