On 6/2/23 12:19, Stefan Monnier wrote:
The most recent general-purpose Intel CPU without VT-X is from 2012.
[...]
*everything* on processors that old is slow.
Actually, for many (most?) single-threaded applications, I wouldn't be
surprised if some 2010 CPUs end up within a factor 3 of the most badass
desktop you can find today.
I do Perl development and like to run my module test suites in parallel
to shorten the develop-test cycle. Tuned correctly, I can keep all 8
threads busy on my quad-core Hyper-Threading processors for the majority
of the run time.
These are the test platforms (all have SATA 6 Gbps SSD's and enough
memory to avoid swapping):
* Dell Latitude E6520 laptop with Core i7-2720QM (Q1'11)
* Homebrew Antec tower with Intel DQ67SW desktop board and Core i7-2600S
processor (Q1'11)
* Dell Precision 3630 with Xeon E-2174G (Q3'18)
I will look up the PassMark CPU Mark scores for the various processors,
gather Perl module test suite run time data, and do a Power Regression
analysis with LibreOffice Calc:
https://help.libreoffice.org/6.1/en-US/text/scalc/01/statistics_regression.html?DbPAR=CALC
https://www.cpubenchmark.net/cpu_list.php
Here is the data table for the regression analysis:
x y
CPU Mark Test Time
(dim) (seconds)
Core i7-2720QM 4068 24.033
Core i7-2600S 4594 22.985
Xeon E-2174G 9712 16.544
Here is the resulting equation:
y = exp(6.779011065)*(x^-0.43266897)
Here are the predicted Test Time values for a Core i7-2600 (Q1'11) and a
Core i7-13700 (Q1'23):
x y
CPU Mark Test Time
(dim) (seconds)
i7-2600 5330 21.461
i7-13700 38995 9.072
So, the Core i7-13700 is predicted to be faster than the Core i7-2600 by
a factor of 21.461 / 9.072 = 2.366.
David
