seniorR
What is data.table and why is it faster than data.frame?
Updated May 24, 2026
Short answer
data.table uses in-place modification and optimized indexing for speed.
Deep explanation
It avoids copying, uses binary search indexing, and optimized C implementations for grouping and joins.
Unlock with a Pro subscription to view this section.
View pricingReal-world example
No real-world example available yet.
Unlock with a Pro subscription to view this section.
Upgrade to ProCommon mistakes
No common mistakes listed yet.
Unlock with a Pro subscription to view this section.
Upgrade to ProFollow-up questions
No follow-up questions available yet.
Unlock with a Pro subscription to view this section.
Upgrade to Pro