Occasionally, the time from fetchStartDate to requestStartDate of NSURLSessionTaskTransactionMetrics is relatively long when both dns and tcp are multiplexed

App & System Services Networking
rencheng OP
Created Apr ’23
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HTTP2 connectStartDate，connectEndDate, dnsStartDate and dnsEndDate is nil。

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Views  454
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rencheng OP
Apr ’23

The pre-request of this request initiated dns and tcp, but some time cannot be explained

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rencheng OP
Apr ’23

The pre-request of this request initiates dns and tcp, so I think this stage is [time-consuming.]

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Occasionally, the time from fetchStartDate to requestStartDate of NSURLSessionTaskTransactionMetrics is relatively long when both dns and tcp are multiplexed
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