Which of the following tends to have the biggest negative impact on workspace performance?

• A. Boolean attributes
• B. List attributes
• C. Numerical attributes
• D. Text attributes

Answer: (B)

Handling multi-valued attributes is the biggest drag on workspace performance. A List attribute means each feature carries a collection of values, not a single value. That adds a lot of extra work for many transformers: they may need to iterate through every item, perform lookups or filters inside the list, or explode the list into multiple features. All of this increases CPU time and memory usage, especially when lists are large or numerous across features. By contrast, Boolean and numerical attributes are simple, fixed-size values to copy and compare, and text attributes are single strings (even if long), which generally don’t multiply the amount of processing as much as handling a multi-valued list does. So List attributes tend to have the most negative impact on performance.