R fast single item lookup from list vs data.table vs hash

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  4. Is there a dplyr equivalent to data.table::rleid?
  5. What is the purpose of setting a key in data.table?
  6. Assign multiple columns using := in data.table, by group
  7. How to replace NA values in a table for selected columns
  8. .EACHI in data.table?
  9. Use a value from the previous row in an R data.table calculation
  10. data.table “key indices” or “group counter”
  11. Faster way to read fixed-width files
  12. Select subset of columns in data.table R [duplicate]
  13. Melt using patterns when variable names contain string information – avoid coercion to numeric
  14. Error: package or namespace load failed for ggplot2 and for data.table
  15. How to perform join over date ranges using data.table?
  16. How to extract the first n rows per group?
  17. Split text string in a data.table columns
  18. Update subset of data.table based on join
  19. Dynamically build call for lookup multiple columns
  20. knitr gets tricked by data.table `:=` assignment
  21. Options for caching / memoization / hashing in R
  22. Add multiple columns to R data.table in one function call?
  23. Subsetting data.table using variables with same name as column
  24. data.table merge based on date ranges
  25. Reason behind speed of fread in data.table package in R
  26. data.table row-wise sum, mean, min, max like dplyr?
  27. Select NA in a data.table in R
  28. Any way to force fread() of data.table not to stop on empty lines?
  29. Index unique values in data.table
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