Alex Crichton a83c3af4bf Ensure our JS heap is a dense array
Turns out `heap.fill(undefined)` is required to ensure it's a dense
array, otherwise we'll accidentally be a sparse array and much slower
than necessary!
2018-11-30 13:23:41 -08:00
..
2018-11-30 13:23:41 -08:00
2018-11-12 09:28:01 -08:00