The new beta (see http://www.jsoftware.com/download/jengine)
contains the first steps towards general support for
operations-in-place. Verb executions that can reuse an argument block
do so. Previously operations in place were supported only for sentences
matching a small number of restrictive templates.
An example is the phrase
,~/ i. 1000000
which used to take 10 seconds but now takes about 0.01 seconds.
I have tested this as much as I can, but I would be very grateful if J
users would take the time to try it on their favorite code and report
any problems.
The next release will see inplace execution supported for many more verbs.
Henry Rich
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