100000 ts 'i. 100'
2.82902e_6 1152
100000 ts 'i. 400'
3.51904e_6 2688
100000 ts 'i. 800'
4.16341e_6 4736
Yes, it's fast; but it appears that monad i. actually creates an array.
Wouldn't it be better to have a single copy of i. 16384 (or so), with
data headers of all the sizes from 0 to 16384 pre-built, so that
executing i. merely pointed to the correct header? If you started the
use count of each of the canned headers at 1, there would be no
possibility of a primitive's modifying the shared i. vector.
This optimization seems obvious, so I await enlightenment from someone
who knows how the interpreter works.
Henry Rich
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
