Timestamp/Latency of HTTP Request

I’m trying to perfect the latency value that I return for all HTTP requests made to my Wix Site’s endpoint.

Can any confirm that request.headers[ ‘x-request-id’ ] is the timestamp when the request is made? Or is there any other value in the request object that defines the timestamp of when the request was made.

https://www.wix.com/corvid/reference/wix-http-functions/wixhttpfunctionrequest