FlatPagemap: Stop allocating way more space than needed #236
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FlatPagemap computes the size of its internal `top` array as if it needed an entry per byte, rather than an entry per instance of its template type T. In practice. T has always been uint8_t so far, so this hasn't mattered, but when we use a larger type, suddenly FlatPagemap balloons to much larger than needed.
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FlatPagemap computes the size of its internal
toparray as if it needed anentry per byte, rather than an entry per instance of its template type T. In
practice. T has always been uint8_t so far, so this hasn't mattered, but when
we use a larger type, suddenly FlatPagemap balloons to much larger than needed.