Help / Release / J 6.02 / (+/%#)/. Improved
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(+/%#)/. Improved |
initial writing: 2007-07-27 |
The dyad (+/%#)/. has been made more efficient. The following benchmarks demonstrate the improvement.
xi1=: 1e6 ?@$ 10000 xj1=: 1e4 * xi1 y1 =: 0.1 * 1e6 ?@$ 2e9 xi2=: 1e5 ?@$ 1000 xj2=: 1e4 * xi2 y2 =: 0.1 * 1e5 10 ?@$ 2e9 ts=: 6!:2 , 7!:2@] NB. time and space ts 'Expression'
| Expression | J 6.02 | J 6.01 | Ratio | |||||||||
| xi1 (+/%#)/. y1 | 0.0157986 | 329216 | 0.1443095 | 22900480 | 9.13 | 69.56 | ||||||
| xj1 (+/%#)/. y1 | 0.1069233 | 12584448 | 0.2223472 | 22900480 | 2.08 | 1.82 | ||||||
| xi2 (+/%#)/. y2 | 0.0074975 | 267776 | 0.0330664 | 10365696 | 4.41 | 38.71 | ||||||
| xj2 (+/%#)/. y2 | 0.0113118 | 1574400 | 0.0373405 | 10365696 | 3.30 | 6.58 | ||||||