Thanks for the very thorough answer! It really clarifies why, in Pichi's benchmarks, the immutable version creates objects about 10x faster than the mutable one. (And I'm always happy to provide someone with an excuse for an Iron Man post, seeing as I always seem to be looking for them myself.)

In reply to Re^4: Creating accessors on the fly, or not... by dsheroh
in thread Creating accessors on the fly, or not... by ~~David~~

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