Hi,
On Fri, Nov 11, 2011 at 7:26 AM, Oliver wrote:
> Christofer Bogaso gmail.com> writes:
> [...]
>> Here my question is, is there any speed reduction if I put them within a
>> function (I think there may be some speed reduction at least within
>> for-loop, because that loop needs to call that f
Christofer Bogaso gmail.com> writes:
[...]
> Here my question is, is there any speed reduction if I put them within a
> function (I think there may be some speed reduction at least within
> for-loop, because that loop needs to call that function many times),
> relative to if I used that group of c
Dr Murdoch,
You're absolutely correct -- my apologies.
Michael
On Thu, Nov 10, 2011 at 10:44 AM, Duncan Murdoch
wrote:
> On 10/11/2011 10:28 AM, R. Michael Weylandt wrote:
>>
>> Yes, there will be some reduction in speed:
>>
>> E.g.,
>>
>> > system.time(replicate(1e5, (function() sum(1:10))())
On 10/11/2011 10:28 AM, R. Michael Weylandt wrote:
Yes, there will be some reduction in speed:
E.g.,
> system.time(replicate(1e5, (function() sum(1:10))()))
user system elapsed
0.696 0.022 0.729
> system.time(replicate(1e5, sum(1:10)))
user system elapsed
0.292 0.006 0
You can always runs a quick test. Here a loop is repeated 10M times
and the cost of the function call adds 344 ns; is this significant in
your case? Probably not for the modularity that is gained. For your
10,000 loops, it would add 3.44 ms to the overall run (less than an
blink of the eye).
>
Hi Christofer,
Any speed reduction should be relatively small, and the advantage in
terms of easily maintainable, clearly understandable code will be
enormous. If the function you make from the code does not have any
methods and you are concerned about a slow down related to your loop
repeatedly
Yes, there will be some reduction in speed:
E.g.,
> system.time(replicate(1e5, (function() sum(1:10))()))
user system elapsed
0.696 0.022 0.729
> system.time(replicate(1e5, sum(1:10)))
user system elapsed
0.292 0.006 0.306
But it's not much: 3 tenths of a second for 10,000 ca
Hi,
On Thu, Nov 10, 2011 at 10:07 AM, Christofer Bogaso
wrote:
> Dear all. Let say I have a group of codes which will be used in many places
> in my overall R-code files. These group of codes will be used within a
> for-loop (with a big length, like 1 times) and also many other places
> outsi
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