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Reading files in parallel

The Data Analyst on your team has a long list of files that contains birth data from the USA. She has written the following loop to read them all into her workspace:

  df_all <- NULL

  for (file in file_list) {

    df <- read.csv(file)
    df_all <- rbind(df_all, df)
  }

The only problem is that this is taking too long. You, as the resident R expert, want to help. The parallel and profvis packages have been loaded for you.

This exercise is part of the course

Parallel Programming in R

View Course

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# Wrap this code in a profvis call
___
  df_all <- NULL
  
  for (file in file_list) {
    df <- read.csv(file)
    df_all <- rbind(df_all, df)
  }
___
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