I have recently done a POC to demonstrate the use of Apache SSI in the scenario where we have a common component that may be displayed on multiple pages of the website, common example is header/footer, which is being authored and published once and the changes get reflected on all the pages where it is being used without actually publishing all the pages. Including common component Via SSI allows for improved performance in publishing content (obviously as less content is published).
Please find attached the end to end details of the POC that can used as a working example.
