Re: [ng-spice] Question about ngspice compared to hspice and spectre


To ng-spice@ieee.ing.uniroma1.it
From jvercamm@roam.agfa.be (Jan Vercammen)
Date Mon, 11 Sep 2000 09:26:38 +0200
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matt,

I have compared ng-spice against a commercial avialable Spice:Smartspice 
(Silvaco -> www.silvaco.com). I am an EMC engineer (electromagnetic 
compatibility)
and I tested large passive networks on ng-spice and smartspice. The passive 
networks
are used to simulate planar power supply circuits with the number of 
components ranging
from several 1K to 500K circuit equations.

There are memory leaks in ng-spice (or like-wise spice3f5) which prohibit to
run circuits with more than 15K circuit equations on ng-spice. Smartspice runs
500K circuits, where I stopped because the circuit took a day to run on a 
Sun workstation (170MHz). Because both ng-spice (spice3f5) and smartspice run
on that same workstation I was able to compare both on the same machine and
spice deck. ng-spice is about a factor of 2.2 times slower than the commercial
smartspice, which I find acceptable.

I also have tested Pspice, but I did not find it attractive, though I can not 
make
any statements about its performance.


regards,

Jan vercammen


I do not find this factor 

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