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Masking is nice but as an alternative & still taking care not to remove leading blanks
q){x where 1b,1_not” “~’:x}s:” the quick brown fox ” ” the quick brown fox ”
Appears to be faster
q)S:10000000#s q)ts:5 {x where not n&prev n:null x}S 197 100663904 q)ts:5 {x where 1b,1_not" "~':x}S 147 83886816caching taking place?
q)ts:5 {x where not n&prev n:null x}S 144 100663904 q)ts:5 {x where 1b,1_not" "~':x}S 148 83886816