<title>Optimize for Bandwidth</title>
<h1>Optimize for Bandwidth</h1>

This page
demonstrates <a href="https://modpagespeed.com/doc/optimize-for-bandwidth">OptimizeForBandwidth</a>
mode.  The resources at the bottom of the page are optimized in-place,
making them smaller but without changing their urls.

<p>

The Apache config file has:

<pre>
  &lt;Location /optimize_for_bandwidth.html&gt;
    # Optimize resources in-place, without changing their urls.
    ModPagespeedRewriteLevel OptimizeForBandwidth
  &lt;/Location&gt;
  &lt;Location /in_place_optimize_for_browser&gt;
    # Serve WebP to browsers that support it, and add the response
    # header "Vary: Accept".
    ModPagespeedEnableFilters in_place_optimize_for_browser
  &lt;/Location&gt;
</pre>

<p>

Links to optimized and unoptimized resources:

<p>

<table border="1" cellpadding=5>
  <tr>
    <th>Original Resource</th><th>Optimized Resource</th>
  <tr>
    <td><a href="inline_javascript.js?PageSpeed=off"
       ><tt>inline_javascript.js?PageSpeed=off</tt></a></td>
    <td><a href="inline_javascript.js"
       ><tt>inline_javascript.js</tt></a></td>
  <tr>
    <td><a href="styles/blue.css?PageSpeed=off"
       ><tt>blue.css?PageSpeed=off</tt></a></td>
    <td><a href="styles/blue.css"
      ><tt>styles/blue.css</tt></a></td>
  <tr>
    <td><a href="in_place_optimize_for_browser/Puzzle.jpg?PageSpeed=off"
       ><tt>Puzzle.jpg?PageSpeed=off</tt></a></td>
    <td><a href="in_place_optimize_for_browser/Puzzle.jpg"
       ><tt>Puzzle.jpg</tt></a></td>
</table>

<hr>

<!-- this script is external, and will be optimized without changing
     its url -->
<script src="rewrite_javascript.js"></script>

<!-- this script is inline, and will be optimized in place -->
<script>
    document.write    (    "world"    )    ;
</script>

<!-- this stylesheet is external, and will be optimized without
     changing its url -->
<link rel="stylesheet" href="styles/blue.css">

<!-- this stylesheet is inline, and will be optimized in place -->
<style>
  #unused    {    background-color:    red   }
</style>

<p>

<!-- This image will be converted to WebP in supporting browsers, and
     optimized regardless.  The url won't change, but the response will be
     served with 'Vary: Accept' so it will work with proxy caches in all
     browsers. -->
<img src="in_place_optimize_for_browser/Puzzle.jpg">