Why MySQL Stored Procedures, Functions, and Triggers Are Bad for Performance

MySQL stored procedures, functions, and triggers are tempting constructs for application developers. However, as I discovered, there can be an impact on database performance when using MySQL stored routines. Not being entirely sure of what I was seeing during a customer visit, I set out to create some simple tests to measure the impact of triggers on database performance. The outcome might surprise you. Why Stored Routines Are Not Optimal Performance-Wise: Short Version Recently, I worked with a customer to profile the performance of triggers and stored routines. What I've learned about stored routines: "dead" code (the code in a branch which will never run) can still significantly slow down the response time of a function/procedure/trigger. We will need to be careful to clean up what we do not need.

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database,tutorial,functions,stored procedures,triggers