Minor performance fixes (#4)

* Try to speed up map creation performance

* Try to speed up some atom/map operations

lib/bubble_lib/dsl_struct.ex

@@ -48,7 +48,7 @@ defmodule BubbleLib.DslStruct do
         struct
         |> Map.keys()
         |> Enum.reject(&(&1 != "__struct__" && (is_list(only) && &1 in only)))
-        |> Enum.map(fn k -> {to_string(k), Map.get(struct, k)} end)
+        |> Enum.map(fn k -> {Atom.to_string(k), Map.get(struct, k)} end)
         |> Map.new()
         |> Jason.Encode.map(opts)
       end
@@ -77,7 +77,7 @@ defmodule BubbleLib.DslStruct do
     orig = apply(mod, :__struct__, [])
 
     Map.keys(orig)
-    |> Enum.map(fn k -> {k, Map.get(struct, to_string(k)) || Map.get(orig, k)} end)
+    |> Enum.map(fn k -> {k, Map.get(struct, Atom.to_string(k)) || Map.get(orig, k)} end)
     |> Map.new()
     |> Map.put(:__struct__, mod)
   end

lib/bubble_lib/map_util.ex

@@ -13,19 +13,24 @@ defmodule BubbleLib.MapUtil do
     |> drop_nils()
   end
 
-  def deatomize(%{__struct__: _} = struct) do
+  def deatomize(%mod{} = struct) do
     struct
-    |> Map.keys()
-    |> Enum.reduce(struct, fn k, s -> Map.put(s, k, deatomize(Map.get(struct, k))) end)
+    |> Map.from_struct()
+    |> Enum.reduce(struct, fn
+      {k, v}, acc when is_map(v) or is_list(v) -> Map.put(acc, k, deatomize(v))
+      {k, v}, acc -> Map.put(acc, k, v)
+    end)
+    |> Map.put(:__struct__, mod)
   end
 
   def deatomize(%{} = map) do
-    map
-    |> Enum.map(fn
-      {%{__struct__: _} = k, v} -> {k, deatomize(v)}
-      {k, v} -> {to_string(k), deatomize(v)}
+    Map.new(map, fn
+      {%_{} = k, v} -> {k, deatomize(v)}
+      {k, v} when is_atom(k) and (is_map(v) or is_list(v)) -> {Atom.to_string(k), deatomize(v)}
+      {k, v} when is_map(v) or is_list(v) -> {k, deatomize(v)}
+      {k, v} when is_atom(k) -> {Atom.to_string(k), v}
+      {k, v} -> {k, v}
     end)
-    |> Map.new()
   end
 
   def deatomize(list) when is_list(list) do
@@ -64,13 +69,11 @@ defmodule BubbleLib.MapUtil do
   end
 
   def deep_keyword_to_map(value) when is_map(value) do
-    Enum.map(value, fn {k, v} -> {k, deep_keyword_to_map(v)} end)
-    |> Enum.into(%{})
+    Map.new(value, fn {k, v} -> {k, deep_keyword_to_map(v)} end)
   end
 
   def deep_keyword_to_map([{_, _} | _] = value) do
-    Enum.map(value, fn {k, v} -> {k, deep_keyword_to_map(v)} end)
-    |> Enum.into(%{})
+    Map.new(value, fn {k, v} -> {k, deep_keyword_to_map(v)} end)
   end
 
   def deep_keyword_to_map(value) when is_list(value) do
@@ -88,9 +91,7 @@ defmodule BubbleLib.MapUtil do
   end
 
   def enum_materialize(%{} = map) do
-    map
-    |> Enum.map(fn {k, v} -> {k, enum_materialize(v)} end)
-    |> Map.new()
+    Map.new(map, fn {k, v} -> {k, enum_materialize(v)} end)
   end
 
   def enum_materialize(list) when is_list(list) do

lib/bubble_lib/map_util/auto_map.ex

@@ -78,7 +78,7 @@ defmodule BubbleLib.MapUtil.AutoMap do
   end
 
   def get_in(%{} = map, [head | tail]) when is_atom(head) do
-    get_in(map, [to_string(head) | tail])
+    get_in(map, [Atom.to_string(head) | tail])
   end
 
   def get_in(%ETS{} = struct, path) do