Re: move constructors likely a requirement

[John W. Eaton]

I pushed the following changesets

  http://hg.savannah.gnu.org/hgweb/octave/rev/7335ebd4c798
  http://hg.savannah.gnu.org/hgweb/octave/rev/b00ddc40b89a

to add move constructors and move assignment operators for the 
dim_vector, Array, string_vector, and octave_value classes.  For me, 
these changes and the others that have been made for performance since 
bug #56752 was reported drops the time to run the bm_toeplitz.m file 
from about 39 seconds down to about 26 seconds.  With version 4.4.1, I 
see a time of about 31 seconds.

jwe