Context switching

Context switching, or task switching, is when a developer is working on multiple projects, or in different languages, at the same time and has to switch between them regularly.

"Doing more than one task at a time, especially more than one complex task, takes a toll on productivity."                                               
                – Multitasking: Switching costs (American Psychological Association)
                     ( http://www.apa.org/research/action/multitask.aspx)
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