I'm trying to analyze some IIS7 logs (W3C format) and am interesting in the time-taken field and its unit.

According to Microsoft the unit is milliseconds.

The length of time that the action took, in milliseconds.

According to the w3c documentation it's in seconds

Time taken for transaction to complete in seconds, field has type <fixed>

What is the correct answer?

1 Answer 1


Milliseconds is correct. A time-taken value of 1000 is one second.

You'll find that the numbers are often 53ms or other low values like that for your static images and files, and the time-taken value increases from there depending on the page and how quickly it runs.

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