Remove Context#app to reduce GC load (experimental)

spec/dsl_helper.cr

@@ -12,11 +12,10 @@ class CustomLogHandler < Kemal::BaseLogHandler
   end
 end
 
-def create_request_and_return_io(handler, request, app = Kemal.application)
+def create_request_and_return_io(handler, request)
   io = IO::Memory.new
   response = HTTP::Server::Response.new(io)
   context = HTTP::Server::Context.new(request, response)
-  context.app = app
   handler.call(context)
   response.close
   io.rewind

spec/param_parser_spec.cr

@@ -22,14 +22,14 @@ describe "ParamParser" do
   end
 
   it "parses url params" do
-    kemal = Kemal.application.route_handler
-    kemal.add_route "POST", "/hello/:hasan" do |env|
+    route_handler = Kemal.application.route_handler
+    route_handler.add_route "POST", "/hello/:hasan" do |env|
       "hello #{env.params.url["hasan"]}"
     end
     request = HTTP::Request.new("POST", "/hello/cemal")
     # Radix tree MUST be run to parse url params.
-    context = create_request_and_return_io_and_context(kemal, request)[1]
-    url_params = Kemal::ParamParser.new(request, context.route_lookup.params).url
+    io_with_context = create_request_and_return_io(route_handler, request)
+    url_params = Kemal::ParamParser.new(request).url
     url_params["hasan"].should eq "cemal"
   end
 

spec/websocket_handler_spec.cr

@@ -1,10 +1,9 @@
 require "./spec_helper"
 
-private def create_ws_request_and_return_io(handler, request, app = Kemal.application)
+private def create_ws_request_and_return_io(handler, request)
   io = IO::Memory.new
   response = HTTP::Server::Response.new(io)
   context = HTTP::Server::Context.new(request, response)
-  context.app = app
   begin
     handler.call context
   rescue IO::Error
@@ -36,7 +35,6 @@ describe "Kemal::WebSocketHandler" do
 
   it "matches on given route" do
     app = Kemal::Base.new
-    handler =  app.websocket_handler
     app.ws "/" { |socket, context| socket.send("Match") }
     app.ws "/no_match" { |socket, context| socket.send "No Match" }
     headers = HTTP::Headers{
@@ -47,13 +45,12 @@ describe "Kemal::WebSocketHandler" do
     }
     request = HTTP::Request.new("GET", "/", headers)
 
-    io_with_context = create_ws_request_and_return_io(handler, request, app)
+    io_with_context = create_ws_request_and_return_io(app.websocket_handler, request)
     io_with_context.to_s.should eq("HTTP/1.1 101 Switching Protocols\r\nUpgrade: websocket\r\nConnection: Upgrade\r\nSec-Websocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=\r\n\r\n\x81\u0005Match")
   end
 
   it "fetches named url parameters" do
     app = Kemal::Base.new
-    handler =  app.websocket_handler
     app.ws "/:id" { |s, c| c.params.url["id"] }
     headers = HTTP::Headers{
       "Upgrade"               => "websocket",
@@ -62,7 +59,7 @@ describe "Kemal::WebSocketHandler" do
       "Sec-WebSocket-Version" => "13",
     }
     request = HTTP::Request.new("GET", "/1234", headers)
-    io_with_context = create_ws_request_and_return_io(handler, request, app)
+    io_with_context = create_ws_request_and_return_io(app.websocket_handler, request)
     io_with_context.to_s.should eq("HTTP/1.1 101 Switching Protocols\r\nUpgrade: websocket\r\nConnection: Upgrade\r\nSec-Websocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=\r\n\r\n")
   end
 

src/kemal/ext/context.cr

@@ -8,8 +8,6 @@ class HTTP::Server
     # :nodoc:
     STORE_MAPPINGS = [Nil, String, Int32, Int64, Float64, Bool]
 
-    property! app : Kemal::Base
-
     macro finished
       alias StoreTypes = Union({{ *STORE_MAPPINGS }})
       @store = {} of String => StoreTypes

src/kemal/init_handler.cr

@@ -12,7 +12,6 @@ module Kemal
     def call(context : HTTP::Server::Context)
       context.response.headers.add "X-Powered-By", "Kemal" if Kemal.config.powered_by_header
       context.response.content_type = "text/html" unless context.response.headers.has_key?("Content-Type")
-      context.app = app
       call_next context
     end
   end