📄 intro4_column2.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Introduction to Ajax Tutorial</title>
</head>
<body>
<p class="main">
Assume we have page A and on this page we have a number of
elements, including a couple of script and style tags. With
synchronous data transfer the script tag needs to be parsed
before the next element is parsed. In this way then the next
element to be parsed by the browser is dependent upon the
script tag being parsed first. Effectively we are creating a
bottleneck of one connection between Web page and browser.
Style tags and link elements in the head section of the
document create the same bottleneck effect. They have to be
parsed one at a time before other page elements can download.
</p>
<p class="main">
Once they have been parsed then the elements in the body
section can use concurrent connections to help speed up the
download process. For example, most servers handle between 2
to 4 concurrent connections between web page and browser.
</p>
</body>
</html>
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