A system and method for monitoring the performance associated with fulfilling resource requests are provided. A client computing component associated with a client computing device identifies an original resource request and associates a record identifier with the original resource request. The client computing component transmits the original resource request and the associated record identifier to a performance measurement component. The client computing component also determines performance data associated with processing the original resource request. In response to the transmission from the client computing component, the performance measurement component further transmits the original resource request and also monitors performance associated with processing the original resource request as well as any embedded resource requests included in a response to the original resource request. The performance measurement component and the client computing component each transmit the determined performance data associated with the record identifier to a processing component for further analysis. Aspects of systems and methods for monitoring the operation and performance of networked devices are provided. In some embodiments, performance measurement components are provided for network client and/or network content providers. Performance measurement components may transmit performance data to a metric processing component.