If you need case-insensitive keys, just lc() the name and store the unaltered name as part of the value (which is itself a hash). An object wrapper for all of this is generally a fine idea because it encapsulates all of the gory details into one module so they won’t spread. Why give any second thought to “performance?” Next year’s hardware will always be faster. (This is not a performance-critical edge case.) If the software is unmaintainable over the course of several years, it will be counted vastly more expensive than the “iron.”
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