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"Longest" seemed clear to me. (Over "largest" and "slowest".)

But you wrote it, so of course it's clear to you. To me, when someone says "the longest part of the program" I immediately think of the routine that stretches over the most lines. That's the longest part of the code.

IDK, "longest part of code" to me clearly seems to refer to length of the code (i.e. lines of code), not to length of its execution time; so I'd say that there definitely seems to be some confusion caused by the choice of words.

Just to further these two posts, that is why I asked my question at the top here. "Hottest" code, I thought, was already well established for most executed. I had never seen "longest" for anything.

To that end, I was taking it to mean that longest "synchronous" path through your system. Not necessarily a single method, by any measure. But, systems have plenty of what I will call "checkpoints" where code can be restarted/rerun with no hard to recover penalty. That is what I took to mean by longest.

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