Abstract: A network system implementing or managing a network-based service is configured to receive a query from a user device, the query indicating a start location and a service location. Based on the start location, service location, and the time of receipt of the query, the network system can determine whether to perform request optimization for the user. In response to determining to perform request optimization and if the user accepts request optimization, the network system can schedule or queue the request for service from the user for processing during an optimization time window. The request optimization can improve the probability that the request from the user is matched with other requests from other users for a rideshare-pooling service class of the network-based service. In some circumstances, the network system can determine to automatically perform request optimization without prompting the user to accept or decline the request optimization.