Suggested performance improvements in R

[t-wojciech]

Recently, there have been several suggestions on R-devel mailing list for improving the R performance. I think it will be good idea to keep these messages here so they don't get lost:

1. Pre-allocating serialization memory buffers
2. Enhancements in base R: Some Suggestions from the {collapse} and {kit} Packages
3. GC: speeding-up the CHARSXP cache maintenance, 2nd try
4. stats::dendrapply() Enhancements
5. An alternative algorithm for which()
6. cwilcox - new version
7. strcapture performance when perl = TRUE
8. Big speedup in install.packages() by re-using connections

Feel free to add more information.

Implemented:

1. as.matrix.dist patch (performance) (wch/r-source@4149881)

[HenrikBengtsson]

Thanks for this. I saw your R-devel on serialization the other day. It reminded me of the (unnecessary) slowness of utils::capture.output();

• https://www.jottr.org/2014/05/26/captureoutput/