One of the main reasons that performance issues are not noticed in development is that some problems are not perceivable on a development system. Issues may not occur until latency increases. This may be because a large amount of data was loaded into the system and retrieving a specific record takes longer. This may also be because each piece of the system is deployed to a separate server, increasing network latency. When the number of users accessing a resource increases, then the latency will also increase.
For example, we can quickly insert a row into an empty database or retrieve a record from a small table, especially when the database is running on the same physical machine as the web server. When a web server ...
