On Thu, May 13, 2021 at 9:18 AM Mark Shannon <mark@hotpy.org> wrote:
Hi Terry,

On 13/05/2021 5:32 am, Terry Reedy wrote:
> On 5/12/2021 1:40 PM, Mark Shannon wrote:
>
>> This is an informational PEP about a key part of our plan to improve
>> CPython performance for 3.11 and beyond.
>
>> As always, comments and suggestions are welcome.
>
> The claim that starts the Motivation section, "Python is widely
> acknowledged as slow.", has multiple problems. While some people
[...] 
> different runtime.

I broadly agree, but CPython is largely synonymous with Python and
CPython is slower than it could be.

The phrase was not meant to upset anyone.
How would you rephrase it, bearing in mind that needs to be short?

"There is broad interest in improving the performance of pure Python code. [optionally: The integration of powerful numerical and other algorithms already makes Python competitive at intensive computations, but programmers whose main interest is in solving non-programming problems cannot  generally create such solutions.]"

[...] 
hopefully make it less of a concern.

Of course, compared to the environmental disaster that is BitCoin, it's
not a big deal.

Every little helps. Please switch off the light as you leave the room.

[...]
It is still important to speed up Python though.

Agreed.
 
If a program does 95% of its work in a C++ library and 5% in Python, it
can easily spend the majority of its time in Python because CPython is a
lot slower than C++ (in general).

That's a pretty loose statement, but I see no reason to quibbe about the details. There's room for improvement, and improvement will be welcome.