Help / Release / J 6.02 / (2;a)$.y and $.y Improved
< Help
Jump to navigation
Jump to search
>> << Pri JfC LJ Phr Dic Voc !: Rel NuVoc wd Help Release
|
(2;a)$.y and $. y Improved |
initial writing: 2007-01-29 |
(2;a)$.y and $.y (equivalent to (2;i.#$y)$.y ) have been more efficient, in particular for matrix or boolean y . The following benchmarks demonstrate the improvement:
b2=: 1e5 10 ?@$ 2 x2=: b2 * 1e5 10 ?@$ 0 b3=: 313 317 11 ?@$ 2 x3=: b3 * 313 317 11 ?@$ 0 ts=: 6!:2 , 7!:2@] NB. time and space ts 'Expression'
| Expression | J 6.02 | J 6.01 | Ratio | |||||||||
| $.b2 | 0.0274254 | 4.72032e6 | 0.0799200 | 1.52066e7 | 2.91 | 3.22 | ||||||
| $.x2 | 0.0670972 | 1.04876e7 | 0.1179362 | 3.35567e7 | 1.76 | 3.20 | ||||||
| $.b3 | 0.0569772 | 9.43891e6 | 0.1119333 | 3.04109e7 | 1.96 | 3.22 | ||||||
| $.x3 | 0.0941701 | 2.09733e7 | 0.1662019 | 6.71111e7 | 1.76 | 3.20 | ||||||
| (2;0 1)$.b3 | 0.0105079 | 5.50778e6 | 0.0185355 | 8.65350e6 | 1.76 | 1.57 | ||||||
| (2;0 1)$.x3 | 0.0404309 | 3.48680e7 | 0.0631660 | 5.26938e7 | 1.56 | 1.51 | ||||||