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Fast AUC computation in R

Fast and lightweight computation of AUC metric for the binary case (1 positive and 0 negative) is offered by lightAUC package. The algorithm used is a fast implementation from algorithm of Fawcett (2006).

Install

The official (CRAN) version of the package can be installed using

install.packages("lightAUC")

Alternatively, the development version of the package can be installed via

if (!require(remotes)) install.packages("remotes")
remotes::install_github("cadam00/lightAUC")

Citation

To cite the official (CRAN) version of the package, please use

Adam, C. (2025). lightAUC: Fast AUC Computation. R package version 0.1.2. doi:10.32614/CRAN.package.lightAUC

Example 

# Create some data
probs   <- c(1, 0.4, 0.8)
actuals <- c(0, 0, 1)
lightAUC(probs, actuals)
## 0.5

For parallel calculations use:

# E.g. 2 cores (you can use cores = parallel::detectCores() for your case)
probs   <- c(1, 0.4, 0.8)
actuals <- c(0, 0, 1)
lightAUC(probs, actuals, parallel = TRUE, cores = 2)
## 0.5

References

Fawcett, T. (2006). An introduction to ROC analysis. Pattern Recognition Letters, 27(8), 861–874. doi:10.1016/j.patrec.2005.10.010