Drastic Throughput Reduction with ScriptMediator in WSO2 Micro Integrator 4.2.0

Question

I am currently using WSO2 Micro Integrator 4.2.0, and during my performance testing, I have encountered a significant reduction in throughput when using the ScriptMediator in my flow.

Without the ScriptMediator, I am achieving a throughput of around 4500-5000 transactions per second. However, when I incorporate the ScriptMediator, the throughput drops dramatically to approximately 300 transactions per second. This issue persists regardless of whether I use the JavaScript or Groovy script engines.The throughput reduction is significant and impacts the performance of my integration flows. I am trying to understand the root cause of this reduction when using the ScriptMediator and seeking advice on mitigating this issue.What could be the reasons for such a drastic reduction in throughput when using the ScriptMediator? Are there alternative ways to achieve similar functionality without such a high-performance penalty? Has anyone else encountered similar issues, and if so, how did you resolve them? Any insights, suggestions, or alternative approaches would be greatly appreciated.

Answer 1

This depends on what you are really doing within the script mediator. If performance is a concern the recommended approach is to create a Class Mediator to perform whatever functionality you need. You can read ore from here.