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What is JSC in the Perf Monitor and what does it represent? Also, what are the two levels of Views in Perf Monitor?
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The JSC column represents the size of the JavaScriptCore managed heap -- how your app is allocating JS objects.
The two levels of the Views column is for Views that are on-screen, versus views that are off-screen or merged. You want to try to get those numbers to be as close as possible to avoid unnecessary layout calculation and processing.
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