A block-request streaming system provides for improvements in the user experience and bandwidth efficiency of such systems, typically using an ingestion system that generates data in a form to be served by a conventional file server, wherein the ingestion system intakes content and prepares it as files or data elements to be served by the file server, which might or might not include a cache. To suppress the execution speed reduction, a program execution control device judges, on invocation of a method during program execution, whether a method invoked has previously been compiled. , starting-up an engine on the basis of a load condition. Rotary drums are arranged on both sides of a roller mounted to the intermediate member. A set of combining weights associated with each pilot sequence for the interfering device is determined as a function of the determined channel estimates of the target device and the interfering device.