Grails request profiling example

UtilFilters.groovy

class UtilFilters {

    def filters = {

        profiler(controller: '*', action: '*') {
            before = {
                request._timeBeforeRequest = System.currentTimeMillis()
            }

            after = {
                request._timeAfterRequest = System.currentTimeMillis()
            }

            afterView = {
                if (params.showTime) {
                    session._showTime = params.showTime == "on"
                }
                if (session._showTime) {
                    def actionDuration = request._timeAfterRequest - request._timeBeforeRequest
                    def viewDuration = System.currentTimeMillis() - request._timeAfterRequest
                    log.debug("Request duration for (${controllerName}/${actionName}): ${actionDuration}ms/${viewDuration}ms")
                }
            }
        }
    }

}