The following message is a courtesy copy of an article
that has been posted to bit.listserv.ibm-main,alt.folklore.computers as well.
re:
http://www.garlic.com/~lynn/2010j.html#81 Percentage of code executed that is
user written
for slightly different slant on the subject ... in the early 70s ..
peter.far...@broadridge.com (Farley, Peter x23353) writes:
> Attention to details like this (and some similar optimizations) saved
> one application I have worked on almost 50% of its previous CPU
> utilization without changing the application algorithm in any other way.
the science center had pio
On 25 Jun 2010 20:47:56 -0700, in bit.listserv.ibm-main you wrote:
>>Your point that the language used for that "5%" doesn't matter is only partly
>>true, IMHO.
>>Knowing how to optimize the language that you or your management chose and
>>knowing the "hot spots" to avoid helps avoid writing or
>Your point that the language used for that "5%" doesn't matter is only partly
>true, IMHO.
>Knowing how to optimize the language that you or your management chose and
>knowing the "hot spots" to avoid helps avoid writing or correct bad code no
>matter the language used.
Algorithms!
Algorithms!
> -Original Message-
> From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On
> Behalf Of Ted MacNEIL
> Sent: Friday, June 25, 2010 7:15 PM
> To: IBM-MAIN@bama.ua.edu
> Subject: Re: Percentage of code executed that is user written was Re:
> Delete all mem
On 25 Jun 2010 15:59:23 -0700, in bit.listserv.ibm-main you wrote:
>---
>My take is that most of the execution time of any given unit of work
>such as a job step or CICS transaction is spent executing system code
>includ
>It's ok to generalize and say that most time is spent in
non-user-written code, but abuse of that code can also be incredibly damaging.
That has been my point all along!
The bad code does what it does, but it's what it does.
I said 5%, which may be wrong, exagerated, and empirical, but the alg
---
My take is that most of the execution time of any given unit of work
such as a job step or CICS transaction is spent executing system code
including access methods, CICS and DB2 supplied code. An SQL statement
presu
On 25 Jun 2010 13:41:08 -0700, in bit.listserv.ibm-main you wrote:
>>Well, aren't 86.7% of all stats made up on the spot?
>
>It wasn't made upbn
>
>>And wouldn't this mean that 90+% of all code running on the system is from
>>IBM or an ISV?
>
>Yes.
>It's invoked by user code, which may grind only
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