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echo: delphi
to: JUD MCCRANIE
from: FRANCOIS PIETTE
date: 1997-07-30 19:56:00
subject: RE: CARDINAL

Salut Jud McCranie !
Dans un message de Jud McCranie dat‚ du 25 Jul 97  12:40:00 il ‚tait dit:
  JM> 3. It handles 32-bit integers as easily as 16-bit
  JM> integers.May be easier. 16-bit TP handles 16-bit integer arithmetic
  JM> a little faster than 8-bit arithmetic. As far as I can tell on
  JM> my Pentium, though, arithmetic on 16- and 32-bit integers are the same
  JM> speed. On a Pentium Pro, however, 32-bit may be fasterthan 16-bit.To
  JM> sum up, there is no speed penalty for using 32-bit integersinstead of
  JM> 16-bit integers with a 32-bit compiler. 
Ypu forget to mention that the 32 bit integer need to be read or 
writtent to/from memory. Doubling the width could double the memory 
bandwidth needed. Also, note that reading or writing a 32 bit  
quantity can be slowed down if the quantity is not well aligned in 
memory. The processor must in some cases perform TWO memory accesses. 
The speed penalty can be quite large !
Amiti‚s,
{-Francois Piette-}
francois.piette@ping.be
http://www.rtfm.be/fpiette
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