Asynchronous task execution

A system comprising one or more modules executable by one or more processors, the one or more modules configured to:

• initiate asynchronous execution of first, second, and third tasks, the first task is associated with a first timeout period that is shorter than a second timeout period that is associated with the second task, the third task is associated with a third timeout period that is shorter than the second timeout, the second task has a priority that is higher than a priority for the first and third tasks;
• enable serial execution of the first and third tasks by delaying execution of the third task until the first timeout period expires or execution of the first task completes;
• and
• responsive to expiration of the third timeout period without completing the second and third tasks, extend, without user input, the third timeout period that is associated with the third task, in which the third timeout period is extended to equal the second timeout period and is configured to expire responsive to expiration or completion of the second timeout period.

One or more computer-readable memories comprising instructions stored thereon that, responsive to execution on a computing device, causes the computing device to:

• initiate asynchronous execution of first and second tasks to render a web page at a client, the first and second tasks are executed in parallel, the first task is associated with a first timeout period that is shorter than a second timeout period that is associated with the second task and the first task has a priority that is less than a priority for the second task;
• and
• responsive to expiration of the first timeout period without completing both the first and second tasks, extend, without user input, the first timeout period that is associated with the first task, the first timeout period extended until completion or expiration of the second timeout period;
• and
• executing the first task having the priority that is less than the priority for the second task responsive to the extending the first timeout period.