I had transit at RUH in May this year to and from LHR from BOM. After the first flight, there was an officer asking transit passengers to step aside and follow him. We went through passport / ID check and then a security check and then took the stairs to the departure area again. The whole process was hassle free and took about 30 mins end to end with 2 young children in tow. Experience on Saudia exceeded my expectations in terms of service and comfort and even the airport transit was not bad at all.