Parallelizing for Loops with plyr and the doMC Package

Understanding Lazy Evaluation in R with Parallel Computing: The Impact of Lazy Evaluation on Variable Behavior.

Understanding Multicore Computing in R and its Memory Implications: A Guide to Efficient Parallelization with Shared and Process-Based Memory Allocation

Counting the Occurrence of Specific Strings in Large Text Files with R

Optimizing Matrix Inversion in R with Parallel Computation