fix/test: benchmark

config/config.exs

@@ -1,5 +1,7 @@
 import Config
 
+config :postgrex, :json_library, JSON
+
 config :parrhesia,
   limits: [
     max_frame_bytes: 1_048_576,

config/prod.exs

@@ -1,3 +1,5 @@
 import Config
 
+config :parrhesia, Parrhesia.Repo, pool_size: 32
+
 # Production runtime configuration lives in config/runtime.exs.

config/runtime.exs

@@ -5,9 +5,20 @@ if config_env() == :prod do
     System.get_env("DATABASE_URL") ||
       raise "environment variable DATABASE_URL is missing. Example: ecto://USER:PASS@HOST/DATABASE"
 
+  default_pool_size =
+    :parrhesia
+    |> Application.get_env(Parrhesia.Repo, [])
+    |> Keyword.get(:pool_size, 32)
+
+  pool_size =
+    case System.get_env("POOL_SIZE") do
+      nil -> default_pool_size
+      value -> String.to_integer(value)
+    end
+
   config :parrhesia, Parrhesia.Repo,
     url: database_url,
-    pool_size: String.to_integer(System.get_env("POOL_SIZE") || "10")
+    pool_size: pool_size
 
   config :parrhesia, Parrhesia.Web.Endpoint,
     port: String.to_integer(System.get_env("PORT") || "4000")