Can you please explain what is the use of
SPIislatency in response headers of SharePoint Online. I am trying to understand the performance tuning concepts of SharePoint Online.
SPIislatency is the time in milliseconds taken in the front-end Web server after the request has been received the front-end Web server, but before the Web Application begins processing the request.
This value is stored in partitioned tables for the
RequestUsage logging provider. This view can be queried to return data pertaining to all client web requests that have been made since the beginning of the retention period.
As per my understanding Response Headers can only be removed using an
HttpModule. Since its SharePoint Online that option is not feasible.