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Postings from February 2017
I've frequently used locking hash keys, and sometimes also hash values, as an effective defensive measure in $work code. (I've also used the Locked type constraint in Types::ReadOnly, which does the same thing with more sugar.) I'm a little surprised by the apparent willingness to break such code. I'd be very happy to see something like a vtable implementation for hashes that would allow features like locking to be removed from the core. Meanwhile, for those keen to squeeze the last ounce of performance, perhaps locking could be disabled via build option in the same way that tainting can be disabled. Tim.Thread Previous | Thread Next