Extents are somehow very slow

[asinghvi17]

On Julia 1.12

Setup

using Extents, GADM, Chairmarks
import GeometryOps as GO

switzerland = GI.geometry(GI.getfeature(GADM.get("CHE"), 1)) |> GO.tuples

Result

julia> @be GO.prepare_naturally($(switzerland.geom[1]))
Benchmark: 17 samples with 1 evaluation
 min    74.916 μs (29 allocs: 1.349 MiB)
 median 143.375 μs (29 allocs: 1.349 MiB)
 mean   12.350 ms (29.24 allocs: 1.349 MiB, 11.73% gc time)
 max    149.128 ms (33 allocs: 1.349 MiB, 99.86% gc time)

julia> @be GI.extent($(switzerland.geom[1].geom[1].geom |> GI.LinearRing); fallback = true)
Benchmark: 416 samples with 1 evaluation
 min    200.292 μs
 median 207.834 μs
 mean   225.360 μs
 max    384.791 μs

This means that creating a natural tree which allocates etc. is 1.3x faster than gettting the extent which is pretty insane. We should try to fix this somehow, because that means that any geometry without cached extent is getting clobbered in benchmarks.