Changeset 53915 in vbox for trunk/src/VBox/Main/idl/apiwrap-server.xsl

Timestamp:

Jan 22, 2015 1:53:43 PM (10 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

97788

Message:

apiwrap-server.xsl: Work around stupid xsltproc performance issue when outputting large 'text' format documents. Force it to split up the output buffer every so often.

File:

• trunk/src/VBox/Main/idl/apiwrap-server.xsl (modified) (6 diffs)

trunk/src/VBox/Main/idl/apiwrap-server.xsl

@@ -43 +43 @@
 
 <!-- - - - - - - - - - - - - - - - - - - - - - -
-  keys for more efficiently looking up types.
+  Keys for more efficiently looking up types.
  - - - - - - - - - - - - - - - - - - - - - - -->
 
@@ -49 +49 @@
 <xsl:key name="G_keyInterfacesByName" match="//interface[@name]" use="@name"/>
 
+
+<!-- - - - - - - - - - - - - - - - - - - - - - -
+  Utility templates.
+ - - - - - - - - - - - - - - - - - - - - - - -->
+
+<!-- Hack Alert! This template helps xsltproc split up the output text elements
+                 and avoid reallocating them into the MB range. Calls to this
+                 template is made occationally while generating larger output
+                 file.  It's not necessary for small stuff like header.
+
+                 The trick we're playing on xsltproc has to do with CDATA
+                 and/or the escape setting of the xsl:text element.  It forces
+                 xsltproc to allocate a new output element, thus preventing
+                 things from growing out of proportions and slowing us down.
+
+                 This was successfully employed to reduce a 18+ seconds run to
+                 around one second (possibly less due to kmk overhead).
+ -->
+<xsl:template name="xsltprocNewlineOutputHack">
+    <xsl:text disable-output-escaping="yes"><![CDATA[
+]]></xsl:text>
+</xsl:template>
 
 <!-- - - - - - - - - - - - - - - - - - - - - - -
@@ -57 +79 @@
     <xsl:param name="file"/>
 
+    <xsl:call-template name="xsltprocNewlineOutputHack"/>
     <xsl:value-of select="concat($G_sNewLine, '// ##### BEGINFILE &quot;', $file, '&quot;', $G_sNewLine)"/>
 </xsl:template>
@@ -1318 +1341 @@
 </xsl:text>
     <xsl:if test="not(@readonly) or @readonly!='yes'">
-    <xsl:text>
+        <xsl:text>
 </xsl:text>
         <xsl:value-of select="concat('STDMETHODIMP ', $topclass, 'Wrap::COMSETTER(', $attrbasename, ')(')"/>
@@ -1430 +1453 @@
     </xsl:call-template>
 
-    <xsl:text>
-</xsl:text>
+    <xsl:call-template name="xsltprocNewlineOutputHack"/>
 </xsl:template>
 
@@ -2306 +2328 @@
 
     <!-- methods -->
+    <xsl:call-template name="xsltprocNewlineOutputHack"/>
     <xsl:call-template name="emitMethods">
         <xsl:with-param name="topclass" select="$topclass"/>