I noticed a much longer execution time in J807-beta compared with J806
concerning the calculation of Bell polynomials.
Verbs:
mndiff=:[:;<@(({.*(#~0<])@}.),.( +/@:,:"1 -@I.@:~:&0 |."0 1 {.&_1
1@#)@}.)@,&0"1
mnmul=: +/@:,:&0 1"1
mnsum=:(+/@:({."1),}.@{.)/.~}."1
diffM=: mnsum@(mnmul,mndiff)
BellP=: diffM&.>^:(<`(<@,:@1 0x"_)) f.
JVERSION
Engine: j807/j64/linux
Beta-d: commercial/2018-04-17T16:06:53
Library: 8.07.13
Qt IDE: 1.7.1/5.5.1
Platform: Linux 64
Installer: J807 install
6!:2 'BellP 30'
26.1978
JVERSION
Engine: j806/j64/linux
Release: commercial/2017-11-06T09:54:01
Library: 8.06.09
Qt IDE: 1.6.2/5.3.2
Platform: Linux 64
Installer: J806 install
6!:2 'BellP 30'
2.34475
This all of course apart from bad programming practice. :-)
@@i
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