Xref: news2.mv.net comp.os.msdos.djgpp:4898
From: richard DOT young AT crc DOT doc DOT ca (Richard Young)
Newsgroups: comp.os.msdos.djgpp
Subject: Speed optimization: memcpy() or for loop ??
Date: 12 Jun 1996 14:56:57 GMT
Organization: Communications Research Centre
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

A question for the optimization experts:

For moving data, is it faster to use

a) memcpy(x,y,n*sizeof(x[0])) 

or 

b) for (i = 0; i < n; i++) x[i] = y[i];

or are they basically the same speed.

With C++ is it better code practice to use b) over a)?

Thanks for all answers and opinions.

-----------------------------------------

Richard Young
Communications Research Centre,
Ottawa, Canada
richard DOT young AT crc DOT doc DOT ca