(time (split-sequence:split-sequence-if (lambda (x) (= 0 (mod x 5))) (alexandria:iota 100000)))
Evaluation took: 3.724 seconds of real time 3.718900 seconds of total run time (3.711284 user, 0.007616 system) 99.87% CPU 12,263,698,176 processor cycles 1,605,632 bytes consed
Evaluation took: 0.003 seconds of real time 0.003513 seconds of total run time (0.003513 user, 0.000000 system) 133.33% CPU 11,559,720 processor cycles 1,900,544 bytes consed
I will write more later when I am less exhausted. It's been a marathon - ten or eleven hours of coding in total to make this PR happen over the last twenty four hours.