In Chrome 71 level2Sum is still 88% slower than a C-style for loop.
jsperf.com/chained-maps-vs-for-loop
In Edge 42 the level3Sum is just as slow as the original chained maps.
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In Chrome 71 level2Sum is still 88% slower than a C-style for loop.
jsperf.com/chained-maps-vs-for-loop
In Edge 42 the level3Sum is just as slow as the original chained maps.