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James Gregory 2013-12-30 15:11:04 +11:00
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<meta name="vspubdate" content="07/01/97" />
<meta name="vscategory" content="Web and Software Development: Game Development,Web and Software Development: Graphics and Multimedia Development" />
<title>Michael Abrash's Graphics Programming Black Book Special Edition: Dead Cats and Lightning Lines</title><!-- HEADER -->
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<!--PUBLISHER=The Coriolis Group, Inc.//-->
<title>Michael Abrash's Graphics Programming Black Book Special Edition: Dead Cats and Lightning Lines</title>
<meta name="chapter" content="37" />
<meta name="pages" content="704-706" />
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<p><br /></p>
<h4 align="left"><a id="Heading4"></a>How Fast Is Fast?</h4>
<h4 align="left" id="Heading4">How Fast Is Fast?</h4>
<p>Your first question is likely to be the following: Just how fast is Listing 37.1? Is it optimized to the hilt or just pretty fast? The quick answer is: It&rsquo;s <i>fast</i>. Listing 37.1 draws lines at a rate of nearly 1 million pixels per second on my 486/33, and is capable of still faster drawing, as I&rsquo;ll discuss shortly. (The heavily optimized AutoCAD line-drawing code that I mentioned in the last chapter drew 150,000 pixels per second on an EGA in a 386/16, and I thought I had died and gone to Heaven. Such is progress.) The full answer is a more complicated one, and ties in to the principle that if it is broken, maybe that&rsquo;s okay&mdash;and to the principle of looking before you leap, also known as profiling before you optimize.</p>
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<p>Profile before you optimize.</p>
<h4 align="left"><a id="Heading5"></a>Further Optimizations</h4>
<h4 align="left" id="Heading5">Further Optimizations</h4>
<p>Following is a quick tour of some of the many possible further optimizations to Listing 37.1.</p>
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<div align="center">
Graphics Programming Black Book &copy; 2001 Michael Abrash
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