I don't think we should worry so much about performance. Yeah it's nice to know and be aware of it, but we should not be conditioned to use a "way" instead of another just because it scores 10% more in some random benchmark. Also as many people pointed out, it differs from browser to browser, and from machine to machine.
We are almost never doing so many operation that we need to worry about these minor performance improvements. User's will not even realize it. Better to worry about UX, page load speed, etc... Though if your doing some intensive work (games, machine learning, etc...) you might benefit from these improvements in some way, but there are other areas where you could benefit more (using efficient data structures that fit your needs for example, instead of just arrays).
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I don't think we should worry so much about performance. Yeah it's nice to know and be aware of it, but we should not be conditioned to use a "way" instead of another just because it scores 10% more in some random benchmark. Also as many people pointed out, it differs from browser to browser, and from machine to machine.
We are almost never doing so many operation that we need to worry about these minor performance improvements. User's will not even realize it. Better to worry about UX, page load speed, etc... Though if your doing some intensive work (games, machine learning, etc...) you might benefit from these improvements in some way, but there are other areas where you could benefit more (using efficient data structures that fit your needs for example, instead of just arrays).