> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[email protected]] On Behalf Of Howard Brazee > Sent: Thursday, August 12, 2010 9:31 AM > To: [email protected] > Subject: Re: basic questions about machine instructions > > On 12 Aug 2010 06:35:34 -0700, [email protected] (McKown, > John) wrote: > > >So the programmers don't even need to understand machine > architecture any more. > >Unfortunately, this leads them to write poorly performing > code due to a total lack of > >understanding of even basic knowledge of "how it really > works". In some C code, > >I have actually seen for loops moving data from one char * > to another char *, > >instead of using strncpy(). Or doing it with subscripts > instead of pointers! > >"for (i=0;src[i];i++) {dst[i]=src[i];}" > > Are there optimizers for library languages such as C? Or isn't that > considered important anymore?
There are optimizers. But even if that code can be optimized, it is still an example of bad programming, IMO. -- John McKown Systems Engineer IV IT Administrative Services Group HealthMarkets(r) 9151 Boulevard 26 * N. Richland Hills * TX 76010 (817) 255-3225 phone * (817)-691-6183 cell [email protected] * www.HealthMarkets.com Confidentiality Notice: This e-mail message may contain confidential or proprietary information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. HealthMarkets(r) is the brand name for products underwritten and issued by the insurance subsidiaries of HealthMarkets, Inc. -The Chesapeake Life Insurance Company(r), Mid-West National Life Insurance Company of TennesseeSM and The MEGA Life and Health Insurance Company.SM ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
