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<p>Ross, that was my expectation, that the SET would be slightly
faster. <br>
</p>
<p>The <font size="6"><b>set </b></font>should <b>fetch </b>the
data, <b>shift </b>it and <b>and </b>it.</p>
<p>Where as the <font size="6"><b>or </b></font>should <b>fetch </b>the
data and execute two <b>compare </b>and <b>jump </b>type
instructions.</p>
<p>In this case, I doubt if the optimisation would make much
difference. Optimisation make a significant difference to loops
and where a variable/constant is used again and again.<br>
</p>
<div class="moz-signature"
signature-switch-id="3e964606-e7ce-403a-b282-9d34cad6084e">
<p>
Regards<br>
<br>
<b>Rohit Gupta</b><br>
B.E. Elec., M.E., Mem IEEE, Member IET<br>
<br>
</p>
</div>
<div class="moz-cite-prefix">On 15/08/2022 22:51, Ross Levis wrote:<br>
</div>
<blockquote type="cite"
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<p class="MsoNormal"><span
style="font-family:"Calibri","sans-serif";color:#1F497D">I
did the test but had to use a loop 40000000 times to get
some separation. The in set statement was actually faster
than doing 2 “or” statements. Around 76 to 65 ticks.
Basically identical and both too fast to be concerned with.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif""
lang="EN-US">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif""
lang="EN-US"> <a class="moz-txt-link-abbreviated" href="mailto:delphi-bounces@listserver.123.net.nz">delphi-bounces@listserver.123.net.nz</a>
[<a class="moz-txt-link-freetext" href="mailto:delphi-bounces@listserver.123.net.nz">mailto:delphi-bounces@listserver.123.net.nz</a>] <b>On
Behalf Of </b>Ross Levis<br>
<b>Sent:</b> Monday, 15 August 2022 6:11 pm<br>
<b>To:</b> 'NZ Borland Developers Group - Delphi List'<br>
<b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:delphi@delphi.org.nz">delphi@delphi.org.nz</a><br>
<b>Subject:</b> Re: [DUG] Curious re efficiency of using
in [set of integer]<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span
style="font-family:"Calibri","sans-serif";color:#1F497D">I
should do that.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Calibri","sans-serif";color:#1F497D">It
may matter if it’s converting to something expensive code in
ASM, and this code is being executed a few thousand times.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif""
lang="EN-US">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif""
lang="EN-US"> <a class="moz-txt-link-abbreviated" href="mailto:delphi-bounces@listserver.123.net.nz">delphi-bounces@listserver.123.net.nz</a>
[<a class="moz-txt-link-freetext" href="mailto:delphi-bounces@listserver.123.net.nz">mailto:delphi-bounces@listserver.123.net.nz</a>] <b>On
Behalf Of </b>Rohit Gupta<br>
<b>Sent:</b> Monday, 15 August 2022 6:01 pm<br>
<b>To:</b> NZ Borland Developers Group - Delphi List<br>
<b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:delphi@delphi.org.nz">delphi@delphi.org.nz</a><br>
<b>Subject:</b> Re: [DUG] Curious re efficiency of using
in [set of integer]<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal"><span
style="font-family:"Arial","sans-serif"">Just
put it in a loop of 10k and time it. <br>
<br>
But honestly, does it really matter? <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal">Regards <br>
Rohit <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p>15/08/2022 17:34:14 Ross Levis
<a class="moz-txt-link-rfc2396E" href="mailto:ross@stationplaylist.com"><ross@stationplaylist.com></a>:<o:p></o:p></p>
</div>
<blockquote style="border:none;border-left:solid #CCCCCC
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<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-family:"Calibri","sans-serif";color:#1F497D">Var
Total: Integer;</span><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-family:"Calibri","sans-serif";color:#1F497D">If
I want to test 2 or 3 values of an integer, I often use</span><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span
style="font-family:"Calibri","sans-serif";color:#1F497D">if
Total in [4,6] then ...</span></b><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-family:"Calibri","sans-serif";color:#1F497D">But
is that more or less efficient for the CPU/ASM coding
than</span><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span
style="font-family:"Calibri","sans-serif";color:#1F497D">if
(Total = 4) or (Total = 6) then ...</span></b><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-family:"Calibri","sans-serif";color:#1F497D">I’m
not sure how to find out myself.</span><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
</blockquote>
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