On this basis, I'm changing my general rule-of-thumb to use concatenation over join.
Go with the most readable alternative. The slowest of your examples happens 300,000 times per second. I very much doubt you do enough concatenatons in you progams for a 15% improvment of that to matter.

In reply to Re^2: Is there a reason to use "join" instead of just using the period? (Benchmark results.) by lidden
in thread Is there a reason to use "join" instead of just using the period? by qazwart

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