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A surprise? Char is a sortable type and Less Than is as fast as Equals and faster than Not Equals.
q)ts:100000 “quick brown fox”>” ”
13 752
q)ts:100000 “quick brown fox”<>” ”
27 880
q)ts:100000 “quick brown fox”=” ”
13 752
q)ts:100000 not”quick brown fox”=” ”
23 864