> Even if it is the most common method in text books (I’m not sure that’s true), it’s also almost always wrong. The index must always be sized to fit what you’re indexing over.

"The code was wrong, so it was OK that I made it slower" is a message board argument, not a business argument.

> As for your compiler statement — yes. At least at Apple, there is ongoing clang compiler work, focused on security, that actively makes things slower, and there has been for years.

The performance of code that runs on consumer devices has less of a measurable economic impact than that of code that runs on the server.