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Copy-on-mutate isn't the same as pointer assigment.
With lazy evaluation you have the *semantics* of a = b[:] but the
performance of a = b. As far as the user can tell, the individual
elements get copied over. The actual copy gets delayed until the
latest possible moment. This is a performance gain because sometimes
the latest possible moment is never.
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- Re: MATLAB
- From: Michael Vanier <email@example.com>