When testing things like this, as well as testing whether it speeds
up your target cases, remember to check that it doesn't slow everything
else down due to the increased size of the eval code pushing something
out of instruction cache or some such effect.
--
Greg
Hi all,
After collecting suggestions in the previous discussion on python-dev
https://mail.python.org/pipermail/python-dev/2017-March/thread.html#147629
and playing with implementation, here is an updated version of PEP 544.
--
Ivan
A link for those who don't like reading long e-mails:
https://
On 24/05/17 21:56, Ben Hoyt wrote:
But interesting to know you got not much of a
speedup!
I think that improvements at the hardware level in terms of
parallelizing instruction and data fetching (and branch prediction) in
even the cheapest processors these days have largely trivialized the
a
On 24/05/17 11:07, Ben Hoyt wrote:
Hi folks,
I was looking at some `dis` output today, and I was wondering if anyone
has investigated optimizing Python (slightly) by adding special-case
bytecodes for common expressions or statements involving constants?
[snip]
Hi Ben,
What you are suggesting
Interesting -- thanks very much, Erik. Yeah, I wonder if the wordcode will
change things too. But interesting to know you got not much of a speedup!
Also, the "x is None" and "x is not None" were the opcodes I started out
thinking would be helpful, so I'm interested to try those.
I'm wondering if
Hi Ben,
On 24/05/17 19:07, Ben Hoyt wrote:
I'm not proposing to do this yet, as I'd need to benchmark to see how
much of a gain (if any) it would amount to, but I'm just wondering if
there's any previous work on this kind of thing. Or, if not, any other
thoughts before I try it?
This is exac
> On 2017-05-24, at 20:26 , Xavier Morel wrote:
>
>> On 2017-05-24, at 20:07 , Ben Hoyt wrote:
>>
>> Hi folks,
>>
>> I was looking at some `dis` output today, and I was wondering if anyone has
>> investigated optimizing Python (slightly) by adding special-case bytecodes
>> for common expres
> On 2017-05-24, at 20:07 , Ben Hoyt wrote:
>
> Hi folks,
>
> I was looking at some `dis` output today, and I was wondering if anyone has
> investigated optimizing Python (slightly) by adding special-case bytecodes
> for common expressions or statements involving constants?
Python 3.6 added
there is the Peephole for that, it's a small optimizer in the compiler.
On 05/24/2017 08:07 PM, Ben Hoyt wrote:
Hi folks,
I was looking at some `dis` output today, and I was wondering if anyone has
investigated optimizing Python (slightly) by adding special-case bytecodes
for common expressions
Hi folks,
I was looking at some `dis` output today, and I was wondering if anyone has
investigated optimizing Python (slightly) by adding special-case bytecodes
for common expressions or statements involving constants?
For example, I (and, based on a quick grep of the stdlib, many others)
write "
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