We were wondering if latency in connecting to a remote database with PHP would slow down the user experience. For example:
1) User submits a PHP form hosted on a CDN server located close to them
2) PHP script passes the collected data from the form to a centralised database hosted in a different datacenter (approx 120 ms latency from CDN server)
Would PHP hold up the user experience because it would be waiting on a 200 response from the database server Or would the latency only exist between the CDN and Database server?
PHP stays running until the script is finished so that includes waiting for the 200 OK response since it is part of the database php command. While in most cases 120 ms will go unnoticed, technically
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