In previous versions of Microsoft Outlook (the classic app), you could view the HTML code of an email by opening the email, right-clicking on it, and selecting “View source” from the context menu.

Facebook’s updated iPhone and iPad apps chose native iOS code for key functions over the HTML5 code that previous incarnations of the apps had been using. Facebook’s engineering team found speed and ...

Developers often take pride in finding elegant code that is easier to understand. But it can also lead to application performance bottlenecks and HTML5 downfalls.