"updatedInventoryETag": "580013e3-0000-0800-0000-698294bf0000",
class StockSpanner {
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Detection is via allocating a slice of zeroed memory, in our case a gigabyte, and then once per minute going through to ensure they're actually all zeroes. Magic!
其他更新细节参考 MacRumors 和 AppleInsider 报道整理如下：