Sparse can never be virtual. Boxed is indirect but allows recursive
usecounts that avoids revisiting boxes repeatedly. In this release most
boxed arrays are going to be created recursive rather than waiting to be
referenced.
After all that is working the same ideas can be extended to
rational/extended precisions.
Henry Rich
On 4/27/2018 5:10 PM, bill lam wrote:
perhaps all indirect data types including sparse data types.
On Sat, Apr 28, 2018, 12:40 AM Henry Rich <[email protected]> wrote:
It turns out that virtual blocks sometimes don't perform well on
extended/rational. I am going to disable virtual blocks for
extended/rational until that is fixed. The problem is that the system
spends too much time twiddling usecounts; the solution is to do for
extended/rational what has been done for boxes.
Henry Rich
On 4/24/2018 5:31 AM, Arie Groeneveld wrote:
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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