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When analyzing memory leaks in Node.js, which method is most effective for identifying growth in retained objects between two heap snapshots?

hard📝 Application Q8 of 15
Node.js - Debugging and Profiling
When analyzing memory leaks in Node.js, which method is most effective for identifying growth in retained objects between two heap snapshots?
AManually inspect each snapshot file in a text editor to find large objects
BUse a diff tool in Chrome DevTools to compare the two heap snapshots and identify increasing retained sizes
CRun garbage collection manually and check if the snapshots are identical
DTake a single snapshot and rely on CPU profiling to detect leaks
Step-by-Step Solution
Solution:

  1. Step 1: Take multiple heap snapshots at different times

    This captures the memory state at different points.

  2. Step 2: Use Chrome DevTools' snapshot comparison feature

    This tool highlights objects whose retained size has increased, indicating potential leaks.

  3. Final Answer:

    Use a diff tool in Chrome DevTools to compare the two heap snapshots and identify increasing retained sizes -> Option B

  4. Quick Check:

    Comparing snapshots with a diff tool is the standard method [OK]
Quick Trick: Compare snapshots with Chrome DevTools diff feature [OK]
Common Mistakes:
  • Trying to analyze snapshots manually without tools
  • Assuming one snapshot is enough to detect leaks
  • Confusing CPU profiling with memory leak detection

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