Improving R execution speed by profiling the script and finding the bottleneck

This video is using profvis package in R to find the bottleneck in Rscripts and improve execution speed by changing for loop structures and parallel computing using foreach library. The technical details on this video are available in two medium blogs:
The Good, The Bad, The Ugly in R: / the-good-the-bad-the-u...
You need regular check-ups, so do your codes: / you-need-regular-check...
and the scripts for the Movie Search Shiny app is available in my repository at github.com/eja...