Integrated Rank Support (IRS)

   data
1 7 4 5
2 0 6 6
9 3 5 8

   0 {"1 data
1 2 9

   x=: 1e2 1e5 ?@$ 0

   ts=: 6!:2 , 7!:2@]  NB. time & space

   ts '0 {"1 x'        NB. IRS
1.53651e_5 1856

   ts '0 ([ { ])"1 x'  NB. no IRS
0.0423858 1.05094e6

   y=: 1e5 ?@$ 0

   ts '0 { y'
7.26349e_6 640

   ts '0 ([ { ]) y'
1.00571e_5 960