On Sunday, 16 August 2015 at 13:11:12 UTC, Yura wrote:
Python:
#!/usr/bin/python
import sys, string, os, glob, random
from math import *
a = 0
l = 1000
for i in range(l):
for j in range(l):
for m in range(l):
a = a +i*i*0.7+j*j*0.8+m*m*0.9
On Sunday, 16 August 2015 at 13:59:33 UTC, Idan Arye wrote:
Initially I thought the Python version is so slow because it
uses `range` instead of `xrange`, but I tried them both and
they both take about the same, so I guess the Python JIT(or
even interpreter!) can optimize these allocations
On 17/08/2015 1:11 a.m., Yura wrote:
Good afternoon, gentlemen,
just want to describe my very limited experience. I have re-written
about half of my Python code into D. I got it faster by 6 times. This is
a good news.
However, I was amazed by performance of D vs Python for following simple
Good afternoon, gentlemen,
just want to describe my very limited experience. I have
re-written about half of my Python code into D. I got it faster
by 6 times. This is a good news.
However, I was amazed by performance of D vs Python for following
simple nested loops (see below). D was
On Sunday, 16 August 2015 at 13:11:12 UTC, Yura wrote:
Good afternoon, gentlemen,
just want to describe my very limited experience. I have
re-written about half of my Python code into D. I got it faster
by 6 times. This is a good news.
However, I was amazed by performance of D vs Python for
On Thursday, 6 August 2015 at 08:11:49 UTC, Gerald Jansen wrote:
On Wednesday, 5 August 2015 at 18:49:21 UTC, bachmeier wrote:
Yes. The question is whether we can put together a group of
developers to build the infrastructure, which is a lot more
than just code. That means, in particular,
On Thursday, 6 August 2015 at 06:56:11 UTC, Laeeth Isharc wrote:
On Thursday, 6 August 2015 at 02:38:15 UTC, jmh530 wrote:
On Wednesday, 5 August 2015 at 23:37:37 UTC, Laeeth Isharc
wrote:
Dataframes aren't intellectually very exciting, but they are
very useful for iterative data exploration
On Thursday, 6 August 2015 at 02:38:15 UTC, jmh530 wrote:
On Wednesday, 5 August 2015 at 23:37:37 UTC, Laeeth Isharc
wrote:
Dataframes aren't intellectually very exciting, but they are
very useful for iterative data exploration and quick
prototyping since all of that starts with getting the
On Wednesday, 5 August 2015 at 18:49:21 UTC, bachmeier wrote:
Yes. The question is whether we can put together a group of
developers to build the infrastructure, which is a lot more
than just code. That means, in particular, good documentation
and using it for our own projects.
Right on! I
On Thursday, 6 August 2015 at 08:11:49 UTC, Gerald Jansen wrote:
Is the Dscience github project an adequate platform? How can
other people get involved? Is a dedicated discussion group
needed? Can we develop a plan of some sort rather than just a
scatter of individual efforts?
If a group do
Dear all,
Thank you for your replies. I am now really convinced that D is a
decent choice for my project (also I am really happy to see that
the forum is really active and apparently many of you use D for
your scientific projects). I am just looking forward to writing
the code. I had a very
On Wednesday, 5 August 2015 at 17:47:49 UTC, Yura wrote:
Dear all,
Thank you for your replies. I am now really convinced that D is
a decent choice for my project (also I am really happy to see
that the forum is really active and apparently many of you use
D for your scientific projects). I
On Wednesday, 5 August 2015 at 17:47:49 UTC, Yura wrote:
The dominant languages in science now for production codes are
Fortran or C/C++, may be D could become another option?
With kind regards,
Yury
Yes. The question is whether we can put together a group of
developers to build the
On Wednesday, 5 August 2015 at 23:37:37 UTC, Laeeth Isharc wrote:
Dataframes aren't intellectually very exciting, but they are
very useful for iterative data exploration and quick
prototyping since all of that starts with getting the data in
from somewhere in a standard format.
May not
On Wednesday, 5 August 2015 at 18:20:20 UTC, Chris wrote:
On Wednesday, 5 August 2015 at 17:47:49 UTC, Yura wrote:
Dear all,
Thank you for your replies. I am now really convinced that D
is a decent choice for my project (also I am really happy to
see that the forum is really active and
On Wednesday, 5 August 2015 at 18:49:21 UTC, bachmeier wrote:
On Wednesday, 5 August 2015 at 17:47:49 UTC, Yura wrote:
The dominant languages in science now for production codes are
Fortran or C/C++, may be D could become another option?
With kind regards,
Yury
Yes. The question is whether
On Tuesday, 4 August 2015 at 13:42:15 UTC, Chris wrote:
Good that you point that out. Most people I know claim that
it's easier to develop/prototype in with Matlab. Apart from
execution speed and fast prototyping, Matlab is proprietary.
This alone is a deal breaker.
I can only imagine it
On Sunday, 2 August 2015 at 16:25:18 UTC, Yura wrote:
Dear D coders/developers,
I am just thinking on one project in computational chemistry,
and it is sort of difficult for me to pick up the right
language this project to be written. The project is going to
deal with the generation of the
I'm not a programmer myself and used D for a project in computational
electromagnetics. While I had to implement numerical integration and a bit
of linear algebra which was annoying (would be really useful in phobos), it
was a joy to work with and the resulting program was incredibly fast.
Most
On Tuesday, 4 August 2015 at 13:25:22 UTC, maarten van damme
wrote:
I'm not a programmer myself and used D for a project in
computational
electromagnetics. While I had to implement numerical
integration and a bit
of linear algebra which was annoying (would be really useful in
phobos), it
was a
On Tuesday, 4 August 2015 at 13:42:15 UTC, Chris wrote:
On Tuesday, 4 August 2015 at 13:25:22 UTC, maarten van damme
wrote:
I'm not a programmer myself and used D for a project in
computational
electromagnetics. While I had to implement numerical
integration and a bit
of linear algebra which
On Tuesday, 4 August 2015 at 13:58:02 UTC, bachmeier wrote:
On Tuesday, 4 August 2015 at 13:42:15 UTC, Chris wrote:
Good that you point that out. Most people I know claim that
it's easier to develop/prototype in with Matlab. Apart from
execution speed and fast prototyping, Matlab is
On Tuesday, 4 August 2015 at 09:48:07 UTC, Chris wrote:
I agree with bachmeier. You cannot go wrong. You mentioned
nested loops. D allows you to concatenate (or pipe) loops. So
instead of
foreach
{
foreach
{
foreach
{
}
}
}
you have something like
int[] numbers = [-2, 1,
On Tuesday, 4 August 2015 at 18:56:20 UTC, jmh530 wrote:
I don't think I had seen an example like this before (though it
is obvious in retrospect). Is there any advantage in terms of
performance?
The big win is in terms of being able to write complicated,
correct code easily. However, there
On Tuesday, 4 August 2015 at 19:40:30 UTC, jmh530 wrote:
Wrt static typing, I don't think the issue is about catching
bugs in Matlab. I just haven't had much an issue with mixing up
types in Matlab. I can see the arguments about static typing
and ahead of time compilation for performance, but
On Tuesday, 4 August 2015 at 13:58:02 UTC, bachmeier wrote:
I can only imagine it being faster to prototype in Matlab if
there are additional libraries available. D's just a way better
language - Matlab was designed as a replacement for FORTRAN 77
- and static typing means the compiler catches
On Tuesday, 4 August 2015 at 20:37:18 UTC, bachmeier wrote:
A couple of things that might make D more pleasant for me are:
- I do a lot of simulation-related things, where the inputs and
outputs can change a lot as I figure out how I want to do
things, and
- I use R. R was invented down the
On Tuesday, 4 August 2015 at 18:56:20 UTC, jmh530 wrote:
On Tuesday, 4 August 2015 at 09:48:07 UTC, Chris wrote:
I agree with bachmeier. You cannot go wrong. You mentioned
nested loops. D allows you to concatenate (or pipe) loops.
So instead of
foreach
{
foreach
{
foreach
{
}
On Sunday, 2 August 2015 at 16:25:18 UTC, Yura wrote:
Dear D coders/developers,
I am just thinking on one project in computational chemistry,
and it is sort of difficult for me to pick up the right
language this project to be written. The project is going to
deal with the generation of the
On Monday, 3 August 2015 at 06:16:57 UTC, yawniek wrote:
On Sunday, 2 August 2015 at 16:25:18 UTC, Yura wrote:
While it is easy to code in Python there are two things I do
not like:
1) Python is slow for nested loops (much slower comparing to C)
2) Python is not compiled. However, I want to
On Sunday, 2 August 2015 at 16:25:18 UTC, Yura wrote:
While it is easy to code in Python there are two things I do
not like:
1) Python is slow for nested loops (much slower comparing to C)
2) Python is not compiled. However, I want to work with a code
which can be compiled and distributed as
On Monday, 3 August 2015 at 14:25:21 UTC, FreeSlave wrote:
On Sunday, 2 August 2015 at 16:25:18 UTC, Yura wrote:
Dear D coders/developers,
I am just thinking on one project in computational chemistry,
and it is sort of difficult for me to pick up the right
language this project to be
On 3/08/2015 4:25 a.m., Yura wrote:
Dear D coders/developers,
I am just thinking on one project in computational chemistry, and it is
sort of difficult for me to pick up the right language this project to
be written. The project is going to deal with the generation of the
molecular structures
On Sunday, 2 August 2015 at 16:25:18 UTC, Yura wrote:
Dear D coders/developers,
I am just thinking on one project in computational chemistry,
and it is sort of difficult for me to pick up the right
language this project to be written. The project is going to
deal with the generation of the
On Sunday, 2 August 2015 at 16:25:18 UTC, Yura wrote:
Any hints/thoughts/advises?
With kind regards,
Yury
Dear Yura,
D is a perfect fit.
For performance reasons, when releasing your binary make sure to
use one of these compilers:
GDC - GCC D Compiler (comparable performance to gcc)
LDC
Dear D coders/developers,
I am just thinking on one project in computational chemistry, and
it is sort of difficult for me to pick up the right language this
project to be written. The project is going to deal with the
generation of the molecular structures and will resemble to some
extent
On Sunday, 2 August 2015 at 16:25:18 UTC, Yura wrote:
I just wander how D would be suitable for my purpose? Please,
correct me if I am wrong, but in D the need of pointers is
minimal, there is a garbage collector, the arrays can be
dynamically allocated, the arrays can be sliced, ~=, etc which
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