Tags: elixir
If you are concating two lists xs & ys in elixir you can use the operator ++.
If you don’t care about the order of the result you should put the smaller list first, i.e.:
smaller_list ++ larger_list
ys = Enum.to_list(0..1000)
xs = Enum.to_list(0..100_000)
Benchee.run(%{
"native, larger first" => fn ->
xs ++ ys
end,
"native, smaller first" => fn ->
ys ++ xs
end
})mix run lib/benchee/conact.exs
Operating System: macOS
CPU Information: Apple M1 Pro
Number of Available Cores: 10
Available memory: 16 GB
Elixir 1.14.4
Erlang 25.3.2
Benchmark suite executing with the following configuration:
warmup: 2 s
time: 5 s
memory time: 0 ns
reduction time: 0 ns
parallel: 1
inputs: none specified
Estimated total run time: 14 s
Benchmarking native, larger first ...
Benchmarking native, smaller first ...
Name ips average deviation median 99th %
native, smaller first 645.67 K 1.55 μs ±1138.68% 1.21 μs 5.50 μs
native, larger first 3.59 K 278.26 μs ±152.66% 128 μs 1019.67 μs
Comparison:
native, smaller first 645.67 K
native, larger first 3.59 K - 179.67x slower +276.71 μs