Merge pull request #457 from discordapp/master

Hackney performance improvements

Author: benoitc

src/hackney_app.erl

@@ -20,6 +20,8 @@
 %% ===================================================================
 
 start(_StartType, _StartArgs) ->
+  Metrics = metrics:init(hackney_util:mod_metrics()),
+  application:set_env(hackney, metrics, Metrics),
   hackney_sup:start_link().
 
 stop(_State) ->

src/hackney_connect.erl

@@ -66,7 +66,7 @@ create_connection(Transport, Host, Port, Options, Dynamic)
   MaxBody = proplists:get_value(max_body, Options),
 
   %% get mod metrics
-  Engine = metrics:init(hackney_util:mod_metrics()),
+  {ok, Engine} = application:get_env(hackney, metrics),
 
   %% initial state
   InitialState = #client{mod_metrics=Engine,

src/hackney_pool.erl

@@ -209,7 +209,6 @@ start_link(Name, Options0) ->
   gen_server:start_link(?MODULE, [Name, Options], []).
 
 init([Name, Options]) ->
-  process_flag(priority, high),
   case lists:member({seed,1}, ssl:module_info(exports)) of
     true ->
       % Make sure that the ssl random number generator is seeded