How to speed up the GWT compiler ? (Part III)

English version

How to speed up GWT compiler, the main idea is to reduce GWT permutations.

To manage the permutations, I build my own version of GWT 1.5 named GWT 1.5 r2030-olivier.

I am using 1.5 M1:

• svn co http://google-web-toolkit.googlecode.com/svn/trunk -r2030
• Edit I18N.gwt.xml to remove default locale and force "fr_FR" as "default" locale

Index: trunk/user/src/com/google/gwt/i18n/I18N.gwt.xml
===================================================================
--- trunk/user/src/com/google/gwt/i18n/I18N.gwt.xml     (revision 2030)
+++ trunk/user/src/com/google/gwt/i18n/I18N.gwt.xml     (working copy)
@@ -18,7 +18,7 @@

        <!-- Browser-sensitive code should use the 'locale' client property. -->
        <!-- 'default' is always defined.                                    -->
-       <define-property name="locale" values="default" />
+       <define-property name="locale" values="fr_FR" />

        <property-provider name="locale">
                <![CDATA[

• Edit UserAgent.gwt.xml and, in my case, remove unused some browsers : safari, opera, gecko (old firefox/mozilla)

Index: trunk/user/src/com/google/gwt/user/UserAgent.gwt.xml
===================================================================
--- trunk/user/src/com/google/gwt/user/UserAgent.gwt.xml        (revision 2030)
+++ trunk/user/src/com/google/gwt/user/UserAgent.gwt.xml        (working copy)
@@ -19,7 +19,7 @@
 <module>

   <!-- Browser-sensitive code should use the 'user.agent' property -->
-  <define-property name="user.agent" values="ie6,gecko,gecko1_8,safari,opera"/>
+  <define-property name="user.agent" values="ie6,gecko1_8"/>

   <property-provider name="user.agent"><![CDATA[
       var ua = navigator.userAgent.toLowerCase();
@@ -27,11 +27,7 @@
           return (parseInt(result[1]) * 1000) + parseInt(result[2]);
       };

-      if (ua.indexOf("opera") != -1) {
-        return "opera";
-      } else if (ua.indexOf("webkit") != -1) {
-        return "safari";
-      } else if (ua.indexOf("msie") != -1) {
+      if (ua.indexOf("msie") != -1) {
         var result = /msie ([0-9]+).([0-9]+)/.exec(ua);
         if (result && result.length == 3) {
           if (makeVersion(result) >= 6000) {
@@ -44,7 +40,6 @@
           if (makeVersion(result) >= 1008)
             return "gecko1_8";
           }
-        return "gecko";
       }
       return "unknown";
   ]]></property-provider>

With my own build, GWT compiler speeds up my project compilation :

• 12mn with GWT 1.5 r2030
• 4mn with GWT 1.5 r2030-olivier
• 1m15s with GWT 1.5 r2030-olivier + no additional locale
• 1mn with GWT 1.5 r2030-olivier + no locale + gecko1_8

This is an amazing gain : 12mn to 1mn