Lines      Copies    Function name
  -----      ------    -------------
  40 (100%)  4 (100%)  (TOTAL)
  23 (57.5%) 1 (25.0%) jemallocator::layout_to_flags
  11 (27.5%) 1 (25.0%) core::num::<impl usize>::trailing_zeros
   3 (7.5%)  1 (25.0%) <jemallocator::Jemalloc as core::fmt::Debug>::fmt
   3 (7.5%)  1 (25.0%) jemalloc_sys::MALLOCX_ALIGN