How to solve JavaScript Error: "runtime exceeded limit"

[plvndinesh1993]

While executing the proxy only a few times, i am getting this error. Does anyone know, How canI solve this?

{"fault":{"faultstring":" Javascript runtime exceeded limit of 5,000ms","detail":{"errorcode":"steps.javascript.ScriptExecutionFailed"}}}

What are the best practices while facing this kind of error?