On 15 November 2012 at 07:49, Hadley Wickham wrote:
| I didn't, but I'm looking at it now, thanks. The main problem is that
| many of the examples use C++ idioms I don't understand - and as I
That is *the whole point* -- C++, not unlike R, is a version of nethack:
Enter the dungeon, and find the
Mail: dale.sm...@fiserv.com
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From: rcpp-devel-boun...@r-forge.wu-wien.ac.at
[mailto:rcpp-devel-boun...@r-forge.wu-wien.ac.at] On Behalf Of Romain Francois
Sent: Thursday, November 15, 2012 9:18 AM
To: Hadley Wickham
Cc: rcpp-devel
Subject: Re: [Rcpp-devel] Lo
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Just to add one more test here:
Unit: microseconds
exprmin lq median uq max
1 sum1(x) 19.835 20.0445 20.184 20.3585 43.651
2 sum2a(x) 19.835 20.0095 20.184 20.3240 48.958
3 sum2(x) 93.797 94.0760 94.146 94.4250 204.355
4 s
Le 15/11/12 15:14, Hadley Wickham a écrit :
On Thu, Nov 15, 2012 at 8:11 AM, Romain Francois
wrote:
I'm not getting the same results, so I might not make the same conclusions:
Unit: microseconds
exprmin lq median uqmax
1 sum(x) 16.072 16.161 16.2090 16.3110 21.721
2
On Thu, Nov 15, 2012 at 8:11 AM, Romain Francois
wrote:
> I'm not getting the same results, so I might not make the same conclusions:
>
>
> Unit: microseconds
> exprmin lq median uqmax
> 1 sum(x) 16.072 16.161 16.2090 16.3110 21.721
> 2 sum1(x) 10.771 10.954 11.0445 11.1
I'm not getting the same results, so I might not make the same conclusions:
Unit: microseconds
exprmin lq median uqmax
1 sum(x) 16.072 16.161 16.2090 16.3110 21.721
2 sum1(x) 10.771 10.954 11.0445 11.1910 16.163
3 sum2(x) 48.438 48.567 48.6650 48.8425 61.116
4 sum2a(x)
> | I'm trying to get a better handle on writing efficient numerical code
> | with C++. I've attached five implementations of a simple sum function
> | (mostly ignoring NAs) and timed them below:
>
> Did you see the (fairly extensive) comparison in
> examples/ConvolveBenchmarks/
> which comp
On 15 November 2012 at 07:24, Hadley Wickham wrote:
| Hi all,
|
| I'm trying to get a better handle on writing efficient numerical code
| with C++. I've attached five implementations of a simple sum function
| (mostly ignoring NAs) and timed them below:
Did you see the (fairly extensive) compar
Hi all,
I'm trying to get a better handle on writing efficient numerical code
with C++. I've attached five implementations of a simple sum function
(mostly ignoring NAs) and timed them below:
> source("sum.r")
Unit: microseconds
expr minlq medianuq max neval
sum(x) 11.67 11.72
