In a scenario where performance is critical, how would you decide whether to use parallel streams? What factors would you consider to ensure that the use of parallel streams actually enhances performance instead of degrading it?

  • a. Always use parallel streams for better performance as they utilize multiple CPU cores.
  • b. Analyze the size of the data set, the complexity of the stream operations, and the available CPU cores. Use parallel streams only if the data is sufficiently large and operations are computationally intensive.
  • c. Use parallel streams for small data sets and sequential streams for large data sets to balance performance.
  • d. Parallel streams should never be used as they introduce thread synchronization overhead.
Option 'b' is the correct approach. The decision to use parallel streams should be based on data set size, operation complexity, and available resources. Parallel streams may introduce overhead for small data sets or operations that are not computationally intensive. Options 'a' and 'c' are not universally applicable, and option 'd' is incorrect.
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