Fair enough. I said "allegedly" because I had never personally measured the performance difference. Even though you could construe map as "half as fast" (or tw

Fair enough. I said "allegedly" because I had never personally measured the performance difference. Even though you could construe map as "half as fast" (or twice as slow) as the equivalent comprehension, I don't see a difference of ~1 usec making any difference in my code thus far. Good to know, though.