Only use Soup.SessionAsync for gnome-shell < 3.8, because it's deprecated now and leads to many tcp retransmissions; use Soup.Session instead for version >= 3.8 .

README.md

@@ -44,14 +44,6 @@ Run the following commands:
 	cd ~/gnome-shell-extension-weather
 	./autogen.sh && make local-install
 
-If you want to use openweathermap.org without deprecated Soup.SessionAsync (less TCP Retransmission), please use the openweathermap branch instead.
-You need to have at least gnome-shell version 3.8 .
-
-	cd ~ && git clone git://github.com/jenslody/gnome-shell-extension-weather.git
-	cd ~/gnome-shell-extension-weather
-	git checkout openweathermap
-	./autogen.sh && make local-install
-
 ----
 
 # Configuration

src/extension.js

@@ -122,9 +122,7 @@ const WEATHER_CONV_MPS_IN_KPH = 3.6;
 const WEATHER_CONV_MPS_IN_KNOTS = 1.94384449;
 const WEATHER_CONV_MPS_IN_FPS = 3.2808399;
 
-// Soup session (see https://bugzilla.gnome.org/show_bug.cgi?id=661323#c64) (Simon Legner)
+let _httpSession;
-const _httpSession = new Soup.SessionAsync();
-Soup.Session.prototype.add_feature.call(_httpSession, new Soup.ProxyResolverDefault());
 
 const WeatherMenuButton = new Lang.Class({
     Name: 'WeatherMenuButton',
@@ -1107,6 +1105,15 @@ weather-storm.png = weather-storm-symbolic.svg
     },
 
     load_json_async: function(url, params, fun) {
+        if (_httpSession == undefined) {
+            if (ExtensionUtils.versionCheck(['3.6', '3.7'], Config.PACKAGE_VERSION)) {
+                // Soup session (see https://bugzilla.gnome.org/show_bug.cgi?id=661323#c64) (Simon Legner)
+                _httpSession = new Soup.SessionAsync();
+                Soup.Session.prototype.add_feature.call(_httpSession, new Soup.ProxyResolverDefault());
+            } else
+                _httpSession = new Soup.Session();
+        }
+
         let here = this;
 
         let message = Soup.form_request_new_from_hash('GET', url, params);

src/prefs.js

@@ -65,9 +65,7 @@ const WEATHER_URL_BASE = 'http://api.openweathermap.org/data/2.5/';
 const WEATHER_URL_CURRENT = WEATHER_URL_BASE + 'weather';
 const WEATHER_URL_FIND = WEATHER_URL_BASE + 'find';
 
-// Soup session (see https://bugzilla.gnome.org/show_bug.cgi?id=661323#c64) (Simon Legner)
+let _httpSession;
-const _httpSession = new Soup.SessionAsync();
-Soup.Session.prototype.add_feature.call(_httpSession, new Soup.ProxyResolverDefault());
 
 let mCities = null;
 
@@ -544,6 +542,15 @@ const WeatherPrefsWidget = new GObject.Class({
     },
 
     loadJsonAsync: function(url, params, fun, id) {
+        if (_httpSession == undefined) {
+            if (ExtensionUtils.versionCheck(['3.6', '3.7'], Config.PACKAGE_VERSION)) {
+                // Soup session (see https://bugzilla.gnome.org/show_bug.cgi?id=661323#c64) (Simon Legner)
+                _httpSession = new Soup.SessionAsync();
+                Soup.Session.prototype.add_feature.call(_httpSession, new Soup.ProxyResolverDefault());
+            } else
+                _httpSession = new Soup.Session();
+        }
+
         let here = this;
 
         let message = Soup.form_request_new_from_hash('GET', url, params);