StandardServletMultipartResolver.resolveMultipart invoked multiple times for same request

The following should be analyzed because off hand it seems inefficient. Multipart requests are resolved multiple times for handling url mappings which appears to be real inefficient.

https://github.com/grails/grails-core/blob/6f9d173e0af20a852971aad78a42cc42bba7fd80/grails-web-url-mappings/src/main/groovy/org/grails/web/mapping/mvc/UrlMappingsHandlerMapping.groovy#L157

https://github.com/grails/grails-core/blob/6f9d173e0af20a852971aad78a42cc42bba7fd80/grails-web-url-mappings/src/main/groovy/org/grails/web/mapping/mvc/GrailsControllerUrlMappings.java#L45-L67

https://github.com/grails/grails-core/blob/6f9d173e0af20a852971aad78a42cc42bba7fd80/grails-web-url-mappings/src/main/groovy/org/grails/web/mapping/mvc/AbstractGrailsControllerUrlMappings.groovy#L185-L203

-> `DefaultUrlMappingInfo.tryMultipartParams` is invoked for every UrlMappingInfo because of the call to getActionName()

https://github.com/grails/grails-core/blob/6f9d173e0af20a852971aad78a42cc42bba7fd80/grails-web-url-mappings/src/main/groovy/org/grails/web/mapping/AbstractUrlMappingInfo.java#L70-L102

https://github.com/grails/grails-core/blob/6f9d173e0af20a852971aad78a42cc42bba7fd80/grails-web-url-mappings/src/main/groovy/org/grails/web/mapping/DefaultUrlMappingInfo.java#L197-L205

due to `checkDispatchAction(webRequest.getCurrentRequest());`

https://github.com/grails/grails-core/blob/6f9d173e0af20a852971aad78a42cc42bba7fd80/grails-web-url-mappings/src/main/groovy/org/grails/web/mapping/DefaultUrlMappingInfo.java#L215-L221

Start at UrlMappingsHandlerMapping.groovy, GrailsControllerUrlMappings.java, and AbstractGrailsControllerUrlMappings.groovy, then trace getActionName() through AbstractUrlMappingInfo.java and DefaultUrlMappingInfo.java. Check how often DefaultUrlMappingInfo.tryMultipartParams and checkDispatchAction resolve the same request. Done means establishing whether repeated resolution occurs and identifying the required change or test scope.

Written by the indexing model from the issue text.