diff --git a/configs/client-default.js b/configs/client-default.js
index bc5c9b73..48404e2b 100644
--- a/configs/client-default.js
+++ b/configs/client-default.js
@@ -303,9 +303,7 @@ module.exports = function(options) {
         {
             packagePath: "plugins/c9.ide.language/language",
             workspaceDir: workspaceDir,
-            staticPrefix: hosted && !options.packed
-                ? options.ideBaseUrl + "/uph" + staticPrefix
-                : staticPrefix,
+            staticPrefix: staticPrefix,
             workerPrefix: options.CORSWorkerPrefix // "/static/standalone/worker"
         },
         "plugins/c9.ide.language/keyhandler",
diff --git a/node_modules/ace/lib/ace/worker/worker_client.js b/node_modules/ace/lib/ace/worker/worker_client.js
index ba4f20a0..b69071fb 100644
--- a/node_modules/ace/lib/ace/worker/worker_client.js
+++ b/node_modules/ace/lib/ace/worker/worker_client.js
@@ -48,12 +48,13 @@ var WorkerClient = function(topLevelNamespaces, mod, classname, workerUrl) {
     if (config.get("packaged") || !require.toUrl) {
         workerUrl = workerUrl || config.moduleUrl(mod, "worker");
     } else {
+        var skipBalancers = true; // load all scripts from one domain, workers don't support CORS headers
         var normalizePath = this.$normalizePath;
-        workerUrl = workerUrl || normalizePath(require.toUrl("ace/worker/worker.js", null, "_"));
+        workerUrl = workerUrl || normalizePath(require.toUrl("ace/worker/worker.js", null, "_", skipBalancers));
 
         var tlns = {};
         topLevelNamespaces.forEach(function(ns) {
-            tlns[ns] = normalizePath(require.toUrl(ns, null, "_").replace(/(\.js)?(\?.*)?$/, ""));
+            tlns[ns] = normalizePath(require.toUrl(ns, null, "_", skipBalancers).replace(/(\.js)?(\?.*)?$/, ""));
         });
     }
 
diff --git a/node_modules/architect-build/build_support/mini_require.js b/node_modules/architect-build/build_support/mini_require.js
index 2eadd52a..87186077 100644
--- a/node_modules/architect-build/build_support/mini_require.js
+++ b/node_modules/architect-build/build_support/mini_require.js
@@ -152,8 +152,8 @@ var activateModule = function(name) {
         var req = function(path, callback) {
             return _require(name, path, callback);
         };
-        req.toUrl = function(namePlusExt) {
-            return require.toUrl(normalizeName(name, namePlusExt));
+        req.toUrl = function(namePlusExt, _1, _2, skipBalancers) {
+            return require.toUrl(normalizeName(name, namePlusExt), null, null, skipBalancers);
         };
         req.config = require.config;
         
@@ -315,7 +315,7 @@ function undefAll(module, hash) {
 
 require.MODULE_LOAD_URL = MODULE_LOAD_URL;
 
-require.toUrl = function(moduleName, ext, skipExt) {
+require.toUrl = function(moduleName, ext, skipExt, skipBalancers) {
     var absRe = /^([\w\+\.\-]+:|\/)/;
     var index = moduleName.indexOf("!");
     if (index !== -1 || !ext || /^\/|\.js$/.test(moduleName))
@@ -347,7 +347,7 @@ require.toUrl = function(moduleName, ext, skipExt) {
     if (!absRe.test(url)) {
         url = (config.baseUrl || require.MODULE_LOAD_URL + "/") +  url;
     }
-    if (url[0] === "/" && config.baseUrlLoadBalancers) {
+    if (url[0] === "/" && config.baseUrlLoadBalancers && !skipBalancers) {
         var n = Math.abs(hashCode(url)) % config.baseUrlLoadBalancers.length;
         url =  config.baseUrlLoadBalancers[n] + url;
     }
diff --git a/package.json b/package.json
index 90eb43b2..d31197f5 100644
--- a/package.json
+++ b/package.json
@@ -114,6 +114,6 @@
         "c9.ide.threewaymerge": "#229382aa0b",
         "c9.ide.undo": "#b028bcb4d5",
         "c9.ide.upload": "#0bd010d3dc",
-        "c9.ide.welcome": "#412fe300da"
+        "c9.ide.welcome": "#7450aebef6"
     }
 }
\ No newline at end of file
diff --git a/plugins/c9.static/unpacked_helper.js b/plugins/c9.static/unpacked_helper.js
index 15a3fe9a..c5bb48ef 100644
--- a/plugins/c9.static/unpacked_helper.js
+++ b/plugins/c9.static/unpacked_helper.js
@@ -1,3 +1,9 @@
+/**
+ * unpacked_helper speeds up the unpacked version of Cloud9
+ * by using more parallel connections and avoiding
+ * subsubdomains on dogfooding (e.g., ide.dev-lennartcl.c9.io, where
+ * Chrome doesn't support any caching).
+ */
 "use strict";
 
 plugin.consumes = [
@@ -18,20 +24,11 @@ function plugin(options, imports, register) {
     assert(ideBaseUrl, "ideBaseUrl must be set");
     
     var balancers = [
-        baseUrl + "/uph",
+        baseUrl + "/_unp",
+        baseUrl + ":8080/_unp",
+        baseUrl + ":8081/_unp",
+        baseUrl + ":8082/_unp",
     ];
-    /* UNDONE: for now we put all static content on one domain
-               because of reports of CORS errors
-    if (!options.avoidSubdomains)
-        balancers.push(
-            ideBaseUrl
-            // We could include others but dogfooding URLs like
-            // vfs.newclient-lennartcl.c9.io don't have a cert, so
-            // let's not
-            // apiBaseUrl + "/uph",
-            // vfsBaseUrl + "/uph"
-        );
-    */
     
     connectStatic.getRequireJsConfig().baseUrlLoadBalancers = balancers;
     assert(connectStatic.getRequireJsConfig().baseUrlLoadBalancers);
diff --git a/server.js b/server.js
index f5537a91..5616c5ac 100755
--- a/server.js
+++ b/server.js
@@ -29,7 +29,12 @@ var shortcuts = {
     "s":         ["standalone", "-s", "standalone"]
 };
 shortcuts.odev = shortcuts.onlinedev; // For backwards compatibility, if you see this in 2016 remove this line
-var delayLoadConfigs = ["preview", "user-content", "api", "oldclient", "apps-proxy", "worker"];
+var delayLoadConfigs = [
+    // Services that are usually not immediately needed
+    "preview", "user-content", "api", "apps-proxy", "worker",
+    // Services that are very slow to load, blocking others
+    "profile",
+];
 
 module.exports = main;