   PerfTop:    4812 irqs/sec  kernel:12.3%  exact: 100.0% [4000Hz cycles:ppp],  (all, 12 CPUs)
-------------------------------------------------------------------------------

    30.11%  lyon                [.] FillTessellator::update_intersections
    24.77%  lyon                [.] math_utils::segment_intersection
    16.25%  lyon                [.] alloc::slice::merge_sort
    11.26%  lyon                [.] FillTessellator::handle_intersections
     7.22%  libc-2.27.so        [.] __memmove_avx_unaligned_erms
     6.77%  lyon                [.] FillTessellator::tessellate_events
     0.28%  lyon                [.] MonotoneTessellator::vertex
     0.12%  lyon                [.] sdallocx
     0.12%  lyon                [.] mallocx
     0.11%  lyon                [.] alloc::slice::merge_sort
     0.11%  lyon                [.] FillTessellator::insert_edge
     0.08%  lyon                [.] FillTessellator::end_span
     0.08%  lyon                [.] FillTessellator::insert_span
