An optimized version of substring/substr is now in R-devel (76172).
Best,
Tomas
On 2/22/19 8:16 PM, Tomas Kalibera wrote:
On 2/20/19 7:55 PM, Toby Hocking wrote:
Update: I have observed that stringi::stri_sub is linear time
complexity,
and it computes the same thing as base::substring. figure
> From: Tomas Kalibera
>
> Thanks for the report, I am working on a patch that will address this.
>
> I confirm there is a lot of potential for speedup. On my system,
>
> 'N=20; x <- substring(paste(rep("A", N), collapse=""), 1:N, 1:N)'
>
> spends 96% time in checking if the string is asci
On 2/20/19 7:55 PM, Toby Hocking wrote:
Update: I have observed that stringi::stri_sub is linear time complexity,
and it computes the same thing as base::substring. figure
https://github.com/tdhock/namedCapture-article/blob/master/figure-substring-bug.png
source:
https://github.com/tdhock/namedCa
Update: I have observed that stringi::stri_sub is linear time complexity,
and it computes the same thing as base::substring. figure
https://github.com/tdhock/namedCapture-article/blob/master/figure-substring-bug.png
source:
https://github.com/tdhock/namedCapture-article/blob/master/figure-substring
Hi all, (and especially hi to Tomas Kalibera who accepted my patch sent
yesterday)
I believe that I have found another bug, this time in the substring
function. The use case that I am concerned with is when there is a single
(character scalar) text/subject, and many substrings to extract. For exam
