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Add breaking sample from @michalmuskala see #213
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defmodule BenchKeyword do | ||
@compile :inline_list_funcs | ||
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# def pop_throw(keywords, key, default \\ nil) when is_list(keywords) do | ||
# do_pop(keywords, key, []) | ||
# catch | ||
# :not_found -> {default, keywords} | ||
# end | ||
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# defp do_pop([{key, value} | rest], key, acc), | ||
# do: {value, :lists.reverse(acc, delete(rest, key))} | ||
# defp do_pop([{_, _} = pair | rest], key, acc), | ||
# do: do_pop(rest, key, [pair | acc]) | ||
# defp do_pop([], _key, _acc), | ||
# do: throw(:not_found) | ||
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# def pop_ret(keywords, key, default \\ nil) when is_list(keywords) do | ||
# do_pop(keywords, key, [], keywords, default) | ||
# end | ||
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# defp do_pop([{key, value} | rest], key, acc, _keywords, _default), | ||
# do: {value, :lists.reverse(acc, delete(rest, key))} | ||
# defp do_pop([{_, _} = pair | rest], key, acc, keywords, default), | ||
# do: do_pop(rest, key, [pair | acc], keywords, default) | ||
# defp do_pop([], _key, _acc, keywords, default), | ||
# do: {default, keywords} | ||
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# def pop(keywords, key, default \\ nil) when is_list(keywords) do | ||
# case fetch(keywords, key) do | ||
# {:ok, value} -> | ||
# {value, delete(keywords, key)} | ||
# :error -> | ||
# {default, keywords} | ||
# end | ||
# end | ||
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# def pop2(keywords, key, default \\ nil) when is_list(keywords) do | ||
# case :lists.keyfind(key, 1, keywords) do | ||
# {^key, value} -> {value, delete2(keywords, key)} | ||
# false -> {default, keywords} | ||
# end | ||
# end | ||
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# def fetch(keywords, key) when is_list(keywords) and is_atom(key) do | ||
# case :lists.keyfind(key, 1, keywords) do | ||
# {^key, value} -> {:ok, value} | ||
# false -> :error | ||
# end | ||
# end | ||
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def delete_v0(keywords, key) when is_list(keywords) and is_atom(key) do | ||
:lists.filter(fn {k, _} -> k != key end, keywords) | ||
end | ||
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def delete_v1(keywords, key) when is_list(keywords) and is_atom(key) do | ||
do_delete(keywords, key, _deleted? = false) | ||
catch | ||
:not_deleted -> keywords | ||
end | ||
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defp do_delete([{key, _} | rest], key, _deleted?), | ||
do: do_delete(rest, key, true) | ||
defp do_delete([{_, _} = pair | rest], key, deleted?), | ||
do: [pair | do_delete(rest, key, deleted?)] | ||
defp do_delete([], _key, _deleted? = true), | ||
do: [] | ||
defp do_delete([], _key, _deleted? = false), | ||
do: throw(:not_deleted) | ||
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def delete_v2(keywords, key) when is_list(keywords) and is_atom(key) do | ||
delete_v2_key(keywords, key, []) | ||
end | ||
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defp delete_v2_key([{key, _} | tail], key, heads) do | ||
delete_v2_key(tail, key, heads) | ||
end | ||
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defp delete_v2_key([{_, _} = pair | tail], key, heads) do | ||
delete_v2_key(tail, key, [pair | heads]) | ||
end | ||
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defp delete_v2_key([], _key, heads) do | ||
:lists.reverse(heads) | ||
end | ||
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def delete_v3(keywords, key) when is_list(keywords) and is_atom(key) do | ||
case :lists.keymember(key, 1, keywords) do | ||
true -> delete_v3_key(keywords, key, []) | ||
_ -> keywords | ||
end | ||
end | ||
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defp delete_v3_key([{key, _} | tail], key, heads) do | ||
delete_v3_key(tail, key, heads) | ||
end | ||
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defp delete_v3_key([{_, _} = pair | tail], key, heads) do | ||
delete_v3_key(tail, key, [pair | heads]) | ||
end | ||
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defp delete_v3_key([], _key, heads) do | ||
:lists.reverse(heads) | ||
end | ||
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def delete_v4(keywords, key) when is_list(keywords) and is_atom(key) do | ||
case :lists.keymember(key, 1, keywords) do | ||
true -> delete_v4_key(keywords, key) | ||
_ -> keywords | ||
end | ||
end | ||
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defp delete_v4_key([{key, _} | tail], key) do | ||
delete_v4_key(tail, key) | ||
end | ||
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defp delete_v4_key([{_, _} = pair | tail], key) do | ||
[pair | delete_v4_key(tail, key)] | ||
end | ||
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defp delete_v4_key([], _key) do | ||
[] | ||
end | ||
end | ||
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# benches = %{ | ||
# "pop_throw" => fn {kv, key} -> BenchKeyword.pop_throw(kv, key) end, | ||
# "pop_ret" => fn {kv, key} -> BenchKeyword.pop_ret(kv, key) end, | ||
# "pop" => fn {kv, key} -> BenchKeyword.pop(kv, key) end, | ||
# "pop2" => fn {kv, key} -> BenchKeyword.pop2(kv, key) end | ||
# } | ||
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benches = %{ | ||
"delete old" => fn {kv, key} -> BenchKeyword.delete_v0(kv, key) end, | ||
"delete throw" => fn {kv, key} -> BenchKeyword.delete_v1(kv, key) end, | ||
"delete reverse" => fn {kv, key} -> BenchKeyword.delete_v2(kv, key) end, | ||
"delete keymember reverse" => fn {kv, key} -> BenchKeyword.delete_v3(kv, key) end, | ||
"delete keymember body" => fn {kv, key} -> BenchKeyword.delete_v4(kv, key) end | ||
} | ||
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inputs = %{ | ||
"small miss" => {Enum.map(1..10, &{:"k#{&1}", &1}), :k11}, | ||
"small hit" => {Enum.map(1..10, &{:"k#{&1}", &1}), :k10}, | ||
"large miss" => {Enum.map(1..100, &{:"k#{&1}", &1}), :k101}, | ||
"large hit" => {Enum.map(1..100, &{:"k#{&1}", &1}), :k100}, | ||
"huge miss" => {Enum.map(1..10000, &{:"k#{&1}", &1}), :k10001}, | ||
"huge hit" => {Enum.map(1..10000, &{:"k#{&1}", &1}), :k10000} | ||
} | ||
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Benchee.run(benches, inputs: inputs, print: [fast_warning: false], memory_time: 0.5, warmup: 0, time: 0) |