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Show HN: Tracking iCal feed latency across O365/Google/Apple
实时对比 Google/Outlook 的 iCal 订阅延迟，用数据帮你选最靠谱的日历同步方案。
We track a lot of iCal feeds at Timetastic[0] and I thought it'd be interesting to see if we could identify when Google or Outlook's iCal feed fetcher…