julia> smalltree = maketree("root" => [string(i) for i in 1:3]);

# Current main:
julia> @benchmark exec(FileTrees.load($Returns(1), $smalltree; lazy=true))
BenchmarkTools.Trial: 9588 samples with 1 evaluation.
 Range (min … max):  378.400 μs … 27.309 ms  ┊ GC (min … max): 0.00% … 64.64%
 Time  (median):     404.700 μs              ┊ GC (median):    0.00%
 Time  (mean ± σ):   518.627 μs ±  1.306 ms  ┊ GC (mean ± σ):  9.67% ±  3.79%
 Memory estimate: 158.53 KiB, allocs estimate: 2728.

# With PR:
julia> @benchmark exec(FileTrees.load($Returns(1), $smalltree; lazy=true))
BenchmarkTools.Trial: 6720 samples with 1 evaluation.
 Range (min … max):  488.200 μs … 44.203 ms  ┊ GC (min … max): 0.00% … 74.48%
 Time  (median):     532.850 μs              ┊ GC (median):    0.00%
 Time  (mean ± σ):   738.081 μs ±  1.742 ms  ┊ GC (mean ± σ):  9.43% ±  4.04%
 Memory estimate: 191.28 KiB, allocs estimate: 3320.

julia> mediumtree = maketree("root" => [string(i) for i in 1:1000]);

# Current main:
julia> @benchmark exec(FileTrees.load($Returns(1), $mediumtree; lazy=true))
BenchmarkTools.Trial: 75 samples with 1 evaluation.
 Range (min … max):  49.478 ms … 85.537 ms  ┊ GC (min … max):  0.00% … 21.06%
 Time  (median):     69.424 ms              ┊ GC (median):    21.73%
 Time  (mean ± σ):   66.818 ms ± 10.082 ms  ┊ GC (mean ± σ):  17.39% ± 10.23%
 Memory estimate: 41.53 MiB, allocs estimate: 572385.

# With PR:
julia> @benchmark exec(FileTrees.load($Returns(1), $mediumtree; lazy=true))
BenchmarkTools.Trial: 34 samples with 1 evaluation.
 Range (min … max):  136.017 ms … 174.173 ms  ┊ GC (min … max): 10.26% … 18.41%
 Time  (median):     143.190 ms               ┊ GC (median):    11.37%
 Time  (mean ± σ):   147.357 ms ±   9.639 ms  ┊ GC (mean ± σ):  13.47% ±  3.75%
 Memory estimate: 72.54 MiB, allocs estimate: 1133724.

julia> largetree = maketree("root" => [string(i) for i in 1:10000]);

# Current main:
julia> @benchmark exec(FileTrees.load($Returns(1), $largetree; lazy=true))
BenchmarkTools.Trial: 6 samples with 1 evaluation.
 Range (min … max):  806.612 ms …    1.073 s  ┊ GC (min … max): 22.84% … 35.78%
 Time  (median):     969.528 ms               ┊ GC (median):    31.32%
 Time  (mean ± σ):   960.597 ms ± 107.355 ms  ┊ GC (mean ± σ):  31.01% ±  6.69%
 Memory estimate: 489.02 MiB, allocs estimate: 6003015.

# With PR:
julia> @benchmark exec(FileTrees.load($Returns(1), $largetree; lazy=true))
BenchmarkTools.Trial: 3 samples with 1 evaluation.
 Range (min … max):  2.060 s …    2.708 s  ┊ GC (min … max): 25.88% … 31.11%
 Time  (median):     2.257 s               ┊ GC (median):    32.34%
 Time  (mean ± σ):   2.342 s ± 332.086 ms  ┊ GC (mean ± σ):  29.97% ±  3.43%
 Memory estimate: 928.02 MiB, allocs estimate: 11738336.

julia> addprocs(4; exeflags=["--project=.", "-t 1"], lazy=false);

# Current main:
julia> @benchmark exec(FileTrees.load($Returns(1), $smalltree; lazy=true))
BenchmarkTools.Trial: 1323 samples with 1 evaluation.
 Range (min … max):  2.479 ms … 48.137 ms  ┊ GC (min … max): 0.00% … 27.85%
 Time  (median):     3.161 ms              ┊ GC (median):    0.00%
 Time  (mean ± σ):   3.767 ms ±  3.109 ms  ┊ GC (mean ± σ):  2.54% ±  4.24%
 Memory estimate: 239.81 KiB, allocs estimate: 4244.

# With PR
julia> @benchmark exec(FileTrees.load($Returns(1), $smalltree; lazy=true))
BenchmarkTools.Trial: 803 samples with 1 evaluation.
 Range (min … max):  4.098 ms … 41.777 ms  ┊ GC (min … max): 0.00% … 0.00%
 Time  (median):     5.297 ms              ┊ GC (median):    0.00%
 Time  (mean ± σ):   6.220 ms ±  3.890 ms  ┊ GC (mean ± σ):  2.03% ± 4.23%
 Memory estimate: 294.66 KiB, allocs estimate: 5232.

# Current main:
julia> @benchmark exec(FileTrees.load($Returns(1), $mediumtree; lazy=true))
BenchmarkTools.Trial: 2 samples with 1 evaluation.
 Range (min … max):  3.096 s …   3.139 s  ┊ GC (min … max): 1.29% … 1.51%
 Time  (median):     3.117 s              ┊ GC (median):    1.40%
 Time  (mean ± σ):   3.117 s ± 30.027 ms  ┊ GC (mean ± σ):  1.40% ± 0.16%
 Memory estimate: 182.52 MiB, allocs estimate: 6762341.

# With PR:
julia> @benchmark exec(FileTrees.load($Returns(1), $mediumtree; lazy=true))
BenchmarkTools.Trial: 2 samples with 1 evaluation.
 Range (min … max):  3.978 s …    4.406 s  ┊ GC (min … max): 1.67% … 2.08%
 Time  (median):     4.192 s               ┊ GC (median):    1.88%
 Time  (mean ± σ):   4.192 s ± 302.113 ms  ┊ GC (mean ± σ):  1.88% ± 0.29%
 Memory estimate: 236.52 MiB, allocs estimate: 7776384.

# Current main:
julia> @benchmark exec(FileTrees.load($Returns(1), $largetree; lazy=true))
BenchmarkTools.Trial: 1 sample with 1 evaluation.
 Single result which took 406.002 s (1.05% GC) to evaluate,
 with a memory estimate of 14.73 GiB, over 607986258 allocations.

With PR:
julia> @benchmark exec(FileTrees.load($Returns(1), $largetree; lazy=true))
BenchmarkTools.Trial: 1 sample with 1 evaluation.
 Single result which took 401.316 s (1.57% GC) to evaluate,
 with a memory estimate of 15.45 GiB, over 619338178 allocations.