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For anything but small hashes, the total time will be dominated by the time to free all the hash elements (which uses the same code path for both methods). Other than that, the assign will generally have a slightly higher overhead as it has to create an empty list first. In perl 5.26.0, the actual list assign operator has been optimised so that it handles an empty RHS lists more efficiently.

Dave.


In reply to Re: '%hash = ()' is slower than 'undef %hash' by dave_the_m
in thread '%hash = ()' is slower than 'undef %hash' by rsFalse

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