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Learn To Write Computationally-Efficient R Code

There are many online resources for creating efficient R code, as well as our How to Learn R article, so we will just list the key concepts:

Avoid using for or lots of if statements in your R code.
Exploit R's vectorized calculations.
Use apply, sapply, lapply, vapply, apply, and aggregate.
Avoid using Hadleyverse functions for general data manipulation unless you have no other option. E.g., avoid dplyr. (Much of the Hadleyverse is designed for making code "easy" to read, not for making code fast.)

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