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

Context Switching

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

Multitasking vs. Serial

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