[erp5_web_renderjs_ui] Warmup most used gadgets in ERP5 Form

Do the calculations while ERP5 renders the form in JSON

bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_page_form_js.js

@@ -7,6 +7,34 @@ and handling data send&receive.
 (function (window, document, rJS, URI, RSVP, jIO, Blob, URL, asBoolean) {
   "use strict";
 
+  var warmup_gadget_done = false,
+    warmup_list = ['gadget_erp5_label_field.html',
+                   'gadget_erp5_pt_form_list.html',
+                   'gadget_erp5_pt_form_dialog.html',
+                   'gadget_erp5_pt_form_view_editable.html',
+                   'gadget_erp5_pt_form_view.html',
+                   'gadget_erp5_pt_embedded_form_render.html',
+                   'gadget_html5_input.html',
+                   'gadget_html5_textarea.html',
+                   'gadget_html5_input.html',
+                   'gadget_html5_select.html',
+                   'gadget_html5_element.html',
+                   'gadget_erp5_field_datetime.html',
+                   'gadget_erp5_field_float.html',
+                   'gadget_erp5_field_integer.html',
+                   'gadget_erp5_field_list.html',
+                   'gadget_erp5_field_email.html',
+                   'gadget_erp5_field_formbox.html',
+                   'gadget_erp5_field_listbox.html',
+                   'gadget_erp5_field_multilist.html',
+                   'gadget_erp5_field_relationstring.html',
+                   'gadget_erp5_field_multirelationstring.html',
+                   'gadget_erp5_relation_input.html',
+                   'gadget_erp5_field_string.html',
+                   'gadget_erp5_field_textarea.html',
+                   'gadget_erp5_form.html'
+                  ];
+
   /** Return local modifications to editable form fields after leaving the form
   for a while - for example selecting a related object.
 
@@ -132,7 +160,26 @@ and handling data send&receive.
       } else {
         promise_queue
           .push(function () {
-            return gadget.jio_getAttachment(options.jio_key, options.view);
+            var result = gadget.jio_getAttachment(options.jio_key,
+                                                  options.view),
+              i;
+            if (!warmup_gadget_done) {
+              // In order to speed up initial form rendering,
+              // preload most used gadgets while waiting for ERP5 form
+              // calculation
+              // Wait a big for the ajax query to be triggered
+              RSVP.delay(10)
+                .then(function () {
+                  for (i = 0; i < warmup_list.length; i += 1) {
+                    // No need to check the result, as it will fail later
+                    // when rJS will try to instanciate one of this gadget
+                    rJS.declareGadgetKlass(rJS.getAbsoluteURL(warmup_list[i],
+                                                              gadget.__path));
+                  }
+                });
+              warmup_gadget_done = true;
+            }
+            return result;
           })
           .push(function (result) {
             new_state.erp5_document = result;

bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_page_form_js.xml

@@ -230,7 +230,7 @@
             </item>
             <item>
                 <key> <string>serial</string> </key>
-                <value> <string>966.9690.7007.38997</string> </value>
+                <value> <string>970.64578.22606.18107</string> </value>
             </item>
             <item>
                 <key> <string>state</string> </key>
@@ -248,8 +248,8 @@
                     </tuple>
                     <state>
                       <tuple>
-                        <float>1520945628.31</float>
-                        <string>GMT+1</string>
+                        <float>1539702055.43</float>
+                        <string>UTC</string>
                       </tuple>
                     </state>
                   </object>