Array Index Vs Object Lookup

[Dan12]

Check if array search for array of length 48 is slower than object lookup

[Dan12]

Example from editor.js:

    // TODO: convert keypairs to dictionarys/objects

    // {49:0,50:1,51:2...}

    // ascii key mappings to array index
    var keyPairs = [49,50,51,52,53,54,55,56,57,48,189,187,
                    81,87,69,82,84,89,85,73,79,80,219,221,
                    65,83,68,70,71,72,74,75,76,186,222,13,
                    90,88,67,86,66,78,77,188,190,191,16,-1];