What does "timestamp" in "Network.requestWillBeSent" mean?

[muzuiget]

Hi guys.

I am reading Chrome DevTools Protocol spec, and I dumped some data from DevTools.

There a sample data from Network.requestWillBeSent, I notice there are two time fields

timestamp
    Timestamp Timestamp.
wallTime
    Timestamp UTC Timestamp. Experimental

the sample data is

{
        "timestamp": 957711.609563,
        "wallTime": 1510317479.05768
}

I know "wallTime" is a Unix time format, But "timestamp" field value is "957711.609563", What does it mean?

[Kayce Basques]

Paul Irish pointed me to this:

https://chromedevtools.github.io/devtools-protocol/tot/Network/#event-requestWillBeSent

Which describes the data type of the property as MonotonicTime:

"Monotonically increasing time in seconds since an arbitrary point in the past."

But I'm not sure what this "arbitrary point in the past" is...

[Kayce Basques]

DevTools team told me that MonotonicTime is useful for comparing events to other timestamps that are using MonotonicTime. The beginning time is irrelevant, because you're just using it to calculate delta.

[Larry]

[test reply via email]

See this for elapsed time to epoch time conversion: 

  https://groups.google.com/forum/#!topic/google-chrome-developer-tools/mG3lBVjNye0

On Thursday, November 16, 2017 3:48 PM, 'Kayce Basques' via Google Chrome Developer Tools <google-chrome-...@googlegroups.com> wrote:

DevTools team told me that MonotonicTime is useful for comparing events to other timestamps that are using MonotonicTime. The beginning time is irrelevant, because you're just using it to calculate delta.

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[muzuiget]

Thank your for your explaintion.

在 2017年11月17日星期五 UTC+8上午7:48:22，Kayce Basques写道：