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(f,) Improved |
initial writing: 2000-12-01 |
For some time, the dyad hook ($,) has been supported
by special code. Special code has now been implemented
for the dyads {, {., }., e., .
Time and space comparisons are as follows:
b=: ?(6$10)$2 c=: a.{~?(6$10)$#a. y=: ($c)$'y' a=: a.{~ ?13 17 19$#a. i=: _1e6+?13 17 19$2e6 ts=: 6!:2 , 7!:2@] ts 'Expression'
Expression | J 4.06 | J 4.05 | Time Ratio |
1 (e.,) b | 0.000032 1024 | 0.008775 1049728 | 274 |
0 (e.,) b | 0.000028 1024 | 0.008578 1049728 | 306 |
'x' (e.,) c | 0.000023 1152 | 0.008736 1049856 | 380 |
'x' (e.,) y | 0.007173 1152 | 0.018425 1049856 | 2.57 |
a (e.,) c | 0.013079 43072 | 0.020343 1090624 | 1.56 |
i ({,) c | 0.000437 43008 | 0.009308 1090560 | 21.3 |
2000 ({.,) c | 0.000051 4160 | 0.008711 1051712 | 171 |
2000 (}.,) c | 0.009629 1050752 | 0.016291 2098304 | 1.69 |