Indeed, that's very reasonable.
Please open an issue on the tracker!
___
Python-Dev mailing list
Python-Dev@python.org
https://mail.python.org/mailman/listinfo/python-dev
Unsubscribe:
On Tue, Apr 15, 2014 at 8:21 AM, Brett Cannon bcan...@gmail.com wrote:
In my work environment (Python 2.7.2, all the heavy lifting done in
C++), startup costs are dominated by dynamic linking of all our C++
libraries and their Boost wrappers:
Sure, but not everyone uses Boost or has long
On 14 Apr 2014 18:37, Glenn Linderman v+pyt...@g.nevcal.com wrote:
On 4/14/2014 2:51 PM, Brett Cannon wrote:
Freezing everything except encodings.__init__, os, and _sysconfigdata,
I suppose these are omitted because they can vary in different
environments?
But isn't Python built for a
On 15.04.2014 09:45, Chris Angelico wrote:
On Tue, Apr 15, 2014 at 8:21 AM, Brett Cannon bcan...@gmail.com wrote:
In my work environment (Python 2.7.2, all the heavy lifting done in
C++), startup costs are dominated by dynamic linking of all our C++
libraries and their Boost wrappers:
Sure,
On Mon, Apr 14, 2014 at 3:51 PM, Brett Cannon bcan...@gmail.com wrote:
It was realized during PyCon that since we are freezing importlib we could
now consider freezing all the modules to cut out having to stat or read them
from disk. So for day 1 of the sprints I I decided to hack up a
On Tue, Apr 15, 2014 at 1:45 AM, Chris Angelico ros...@gmail.com wrote:
Specific use-case that I can see: Mercurial. In a git vs hg shoot-out,
git will usually win on performance, and hg is using Py2; migrating hg
to Py3 will (if I understand the above figures correctly) widen that
gap, so any
On 14 Apr 2014 17:17, Donald Stufft don...@stufft.io wrote:
Now I will admit I personally have probably had a harder time than some
others because of the nature of the things I was trying to work on, and
lately it’s gotten better (although I think that’s partially because I’m
more known now, and
On 14 Apr 2014 08:42, R. David Murray rdmur...@bitdance.com wrote:
On Mon, 14 Apr 2014 08:18:13 -0400, Nick Coghlan ncogh...@gmail.com
wrote:
On 14 Apr 2014 01:56, Stephen J. Turnbull step...@xemacs.org wrote:
mar...@v.loewis.de writes:
For gaining commit access, it's really more
On Tue, Apr 15, 2014 at 10:41 AM, Nick Coghlan ncogh...@gmail.com wrote:
On 14 Apr 2014 08:42, R. David Murray rdmur...@bitdance.com wrote:
When considering who we give commit access to, I think we would be
well served to start giving more weight to the quality of the code
reviews that
Hi,
2014-04-14 1:39 GMT-04:00 Nathaniel Smith n...@pobox.com:
The new tracemalloc infrastructure in python 3.4 is super-interesting
to numerical folks, because we really like memory profiling.
Cool, thanks :-)
calloc() is more awesome than malloc()+memset() (...)
I had a discussion with
On Tue, Apr 15, 2014 at 9:31 AM, Charles-François Natali
cf.nat...@gmail.com wrote:
Indeed, that's very reasonable.
Please open an issue on the tracker!
Done!
http://bugs.python.org/issue21233
I'll ping numpy-discussion and see if I can convince someone to do the work ;-).
-n
--
Nathaniel
IIRC it is no longer the case that ZIP imports (involving only one
file for a lot of modules) are much faster than regular FS imports?
On Tue, Apr 15, 2014 at 10:34 AM, Eric Snow ericsnowcurren...@gmail.com wrote:
On Tue, Apr 15, 2014 at 1:45 AM, Chris Angelico ros...@gmail.com wrote:
Specific
On Tue, Apr 15, 2014 at 11:19 AM, Daniel Holth dho...@gmail.com wrote:
IIRC it is no longer the case that ZIP imports (involving only one
file for a lot of modules) are much faster than regular FS imports?
It's definitely minimized since Python 3.3 and the caching of stat results
at the
On Wed, Apr 16, 2014 at 1:34 AM, Skip Montanaro s...@pobox.com wrote:
I find it hard to believe
that freezing the stdlib is going to lower the barrier enough for the
Mercurial folks, if, in fact, import slowness is their main reason for
not moving to 3.x.
I've no idea whether that's the case
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
On 04/15/2014 11:34 AM, Skip Montanaro wrote:
I find it hard to believe that freezing the stdlib is going to lower
the barrier enough for the Mercurial folks, if, in fact, import
slowness is their main reason for not moving to 3.x.
My
Eric wrote:
Perhaps not so much a very real advantage as less of a
distraction. It's still significantly slower than 2.7. :)
I'm still confused. I peeked in /usr/bin/hg. The only system modules
it imports directly are os and system (maybe I'm using an ancient
version?). After that, it
On Tue, Apr 15, 2014 at 10:40 AM, Chris Angelico ros...@gmail.com wrote:
I've no idea whether that's the case or not. All I know is, every time
I need to work with a Mercurial repo it feels a lot slower than doing
similar work on a similar size git repo [1], so any improvement (or
reduction of
On Tue, Apr 15, 2014 at 10:42 AM, Daniel Holth dho...@gmail.com wrote:
I wish it was less
than 50 milliseconds (0.05 seconds) including running hg, which is the
common threshold for instant.
Instant for me is the blink of an eye, which Wikipedia reports as
typically between 100ms and 400ms.
On Wed, Apr 16, 2014 at 1:56 AM, Skip Montanaro s...@pobox.com wrote:
On Tue, Apr 15, 2014 at 10:42 AM, Daniel Holth dho...@gmail.com wrote:
I wish it was less
than 50 milliseconds (0.05 seconds) including running hg, which is the
common threshold for instant.
Instant for me is the blink of
On 14 Apr 2014 08:42, R. David Murray rdmur...@bitdance.com wrote:
Or to put it another way, I'd like to encourage contributors who
want to get commit access to focus just as much on doing good
reviews as they do on writing new patches. Currently the focus is
all on getting patches
I find Python's startup time to be very sluggish. I wish it was less
than 50 milliseconds (0.05 seconds) including running hg, which is the
common threshold for instant. On my machine 'python -c ' takes
about 0.05 seconds but 'python3 -c ' takes 0.125 seconds. I will be
very happy to see any
Le 15/04/2014 09:45, Chris Angelico a écrit :
Specific use-case that I can see: Mercurial. In a git vs hg shoot-out,
git will usually win on performance, and hg is using Py2;
Keep in mind those shoot-outs usually rely on large repositories and/or
non-trivial operations, so startup time is
Le 15/04/2014 17:42, Daniel Holth a écrit :
I find Python's startup time to be very sluggish. I wish it was less
than 50 milliseconds (0.05 seconds) including running hg, which is the
common threshold for instant. On my machine 'python -c ' takes
about 0.05 seconds but 'python3 -c ' takes 0.125
Le 14/04/2014 23:51, Brett Cannon a écrit :
It was realized during PyCon that since we are freezing importlib we
could now consider freezing all the modules to cut out having to stat or
read them from disk. So for day 1 of the sprints I I decided to hack up
a proof-of-concept to see what kind of
On Wed, Apr 16, 2014 at 2:40 AM, Antoine Pitrou solip...@pitrou.net wrote:
Le 15/04/2014 09:45, Chris Angelico a écrit :
Specific use-case that I can see: Mercurial. In a git vs hg shoot-out,
git will usually win on performance, and hg is using Py2;
Keep in mind those shoot-outs usually
Le 15/04/2014 17:34, Skip Montanaro a écrit :
This
suggests to me that Mercurial's import slowness is mostly in its own
code (I counted 104 Python modules and six shared objects in its
mercurial package, which isn't going to be affected (much?) by
freezing the Python standard modules.
Skip is
Skip Montanaro writes:
Instant for me is the blink of an eye, which Wikipedia reports as
typically between 100ms and 400ms.
http://en.wikipedia.org/wiki/Blink If you blink, you've missed
Python 2.7 startup on a relatively modern machine.
This is what I see for Mac OS X Mavericks on a
In case you were wondering, I'm using Ubuntu's 2.7.5+ and 3.3.2+.
My feeling has long been that the speed of getting at the --help
option or any initial user feedback from Mercurial or git is a big
driver in perceived speed as opposed to how long the entire operation
might take. But for me any
Le 15/04/2014 19:09, Daniel Holth a écrit :
In case you were wondering, I'm using Ubuntu's 2.7.5+ and 3.3.2+.
My feeling has long been that the speed of getting at the --help
option or any initial user feedback from Mercurial or git is a big
driver in perceived speed as opposed to how long the
On 15 April 2014 18:09, Daniel Holth dho...@gmail.com wrote:
For me Python's startup time (warm) takes about 1/4 of the hg startup
time in the worst case. I expect to both notice and appreciate any
speedups and encourage all optimizers to optimize.
My experience is essentially irrelevant (as a
On Tue, Apr 15, 2014 at 1:29 PM, Antoine Pitrou solip...@pitrou.net wrote:
Le 15/04/2014 19:09, Daniel Holth a écrit :
In case you were wondering, I'm using Ubuntu's 2.7.5+ and 3.3.2+.
My feeling has long been that the speed of getting at the --help
option or any initial user feedback from
On 15/04/2014 18:32, Daniel Holth wrote:
On Tue, Apr 15, 2014 at 1:29 PM, Antoine Pitrou solip...@pitrou.net wrote:
Le 15/04/2014 19:09, Daniel Holth a écrit :
In case you were wondering, I'm using Ubuntu's 2.7.5+ and 3.3.2+.
My feeling has long been that the speed of getting at the --help
On 4/15/2014 12:15 PM, Stephen J. Turnbull wrote:
I've always really liked MvL's 5-reviews-to-get-1 approach.
The only thing I don't like about it[3] is that it puts an explicit
price on core developer time (my time is worth 5x as much as
yours).
Not really true since any of the 5 could be
Can we please stop the argument about Hg vs. Git?
On Tue, Apr 15, 2014 at 12:54 PM, Chris Angelico ros...@gmail.com wrote:
On Wed, Apr 16, 2014 at 2:40 AM, Antoine Pitrou solip...@pitrou.net
wrote:
Le 15/04/2014 09:45, Chris Angelico a écrit :
Specific use-case that I can see:
On Wed, Apr 16, 2014 at 4:54 AM, Guido van Rossum gu...@python.org wrote:
Can we please stop the argument about Hg vs. Git?
My apologies. All I was saying was that hg is a use case where startup
performance really does matter, as opposed to the ones presented
earlier in the thread where a
Terry Reedy writes:
On 4/15/2014 12:15 PM, Stephen J. Turnbull wrote:
The only thing I don't like about it[3] is that it puts an
explicit price on core developer time (my time is worth 5x as
much as yours).
Not really true
But that is *not* your call! It's for the would-be
To finish my timing work I decided to see where Py_InitializeEx_Private()
spends its time. The following is a breakdown measured in microseconds
running using -E:
INIT:
setlocale: 11
envvar: 2
random init: 2
interp creation: 15
thread creation: 6
GIL: 10
_Py_ReadyTypes(): 930
more types: 44
Are you going to post your code (or a link to it)?
On Tue, Apr 15, 2014 at 2:26 PM, Brett Cannon bcan...@gmail.com wrote:
To finish my timing work I decided to see where Py_InitializeEx_Private()
spends its time. The following is a breakdown measured in microseconds
running using -E:
INIT:
On Tue, Apr 15, 2014 at 5:40 PM, Guido van Rossum gu...@python.org wrote:
Are you going to post your code (or a link to it)?
I basically wrote a function that uses gettimeofday() and just calculates
the delta between the calls. Greg Smith verified that I wasn't doing
anything stupid. =)
Apologies for the slow reply, I was travelling back from PyCon.
From Guido:
- I'd prefer a name that plays on 2 and 3, not 2 and 8. :-)
I didn't really expect the name to stick, but Nick and I had such a good laugh
that it would have been unfair not to share it :-) (though I laughed even more
On 4/15/2014 5:26 PM, Brett Cannon wrote:
To finish my timing work I decided to see
where Py_InitializeEx_Private() spends its time. The following is a
breakdown measured in microseconds running using -E:
INIT:
setlocale: 11
envvar: 2
random init: 2
interp creation: 15
thread creation: 6
GIL:
On Apr 15, 2014, at 10:55 PM, Steve Dower wrote:
Really, I'd expect the name to be pretty boring - Python Straddle, Python
2 Strict or Python Migration Edition (if anyone can live with Python ME
;-) )
We often call code that works in both Python 2 and 3 from a single source
bi-lingual. Maybe
On 15 Apr 2014 18:56, Steve Dower steve.do...@microsoft.com wrote:
From Eric:
This should be doable with an import hook. For that matter it would be
pretty straight-forward to provide a script around the Python binary that
installs the import hook. All this could be bundled up and distributed
Well, that's the part that does import site. Anything that speeds up the
code in Lib/site.py might help. :-)
On Tue, Apr 15, 2014 at 5:23 PM, Terry Reedy tjre...@udel.edu wrote:
On 4/15/2014 5:26 PM, Brett Cannon wrote:
To finish my timing work I decided to see
where
Brett Cannon, 14.04.2014 23:51:
It was realized during PyCon that since we are freezing importlib we could
now consider freezing all the modules to cut out having to stat or read
them from disk. So for day 1 of the sprints I I decided to hack up a
proof-of-concept to see what kind of
45 matches
Mail list logo
