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James Gregory 2013-12-30 20:26:41 +11:00
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[Previous](04-09.html) [Table of Contents](index.html) [Next](05-01.html)
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![](images/i.jpg) *A line-drawing subroutine, which executes perhaps a dozen instructions for each display memory access, generally loses less performance to the display adapter cycle-eater than does a block-copy or scrolling subroutine that uses **REP MOVS** instructions. Scaled and three-dimensional graphics, which spend a great deal of time performing calculations (often using very slow floating-point arithmetic), tend to suffer less.*
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@ -118,12 +114,4 @@ cycle-eaters vary in importance on later x86-family processors, with
some cycle-eaters vanishing altogether and new ones appearing, the
concept that understanding these obscure gremlins is a key to
performance remains unchanged, as we'll see again and again in later
chapters.
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[Previous](04-09.html) [Table of Contents](index.html) [Next](05-01.html)
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* * * * *
Graphics Programming Black Book © 2001 Michael Abrash
chapters.