It had previously been thought that vaccinating children against chickenpox would cause a problematic rise in the linked condition shingles, but a recent long-term study from the US disproved that theory.
Instead of yielding one chunk per iteration, streams yield Uint8Array[]: arrays of chunks. This amortizes the async overhead across multiple chunks, reducing promise creation and microtask latency in hot paths.
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A. Preprocessing (Done by OsmAnd when new maps are prepared):
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