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Frontend Performance Quiz Practice
Active Recall Drill Session
← Exit Session
Question 1 of 1
hard
Frontend Performance
In the Implement It Yourself example, why does calling heavyModule.load() twice concurrently NOT trigger two separate network requests?
A
It actually does trigger two separate requests
B
The second concurrent call reuses the SAME in-flight promise (loadingPromise) rather than starting a new import — confirmed by both calls resolving to the identical module reference
C
JavaScript automatically prevents duplicate network requests
D
The cache prevents any requests from ever happening
Check Answer