Cache Management in HTML eReading Application

• US 20130174016A1
• Filed: 05/01/2012
• Published: 07/04/2013
• Est. Priority Date: 12/29/2011
• Status: Active Grant

• Current Assignee: Chegg Incorporated
• Original Assignee: Chegg Incorporated
• Inventors: Eder-Pressman, Ohad, Le Chevalier, Vincent, Geiger, Charles F., Glazer, Arieh
• Granted Patent: US 9,569,557 B2
• Time in Patent Office: Days
• US Class Current: 715/234
• CPC Class Codes: G06F 16/9574 of access to content, e.g. by caching

Abstract

Embodiments of the invention provide a system and a method for providing consistent user experience in eReading applications. The system extracts a set of attributes of browsers and platforms on which an eReading application is running The system receives a target eReading application performance. The system adjusts behavior of the eReading application to compensate for the difference between the extracted set of attributes and the target eReading application performance.

Claims

1. A method of providing consistent user experience in eReading, the method comprising:

extracting a set of attributes of browsers and platforms on which an eReading application is running;

receiving a target eReading application performance;

adjusting behavior of the eReading application to compensate for difference between the extracted set of attributes and the target eReading application performance.

2. The method of claim 1, wherein the set of attributes include at least one of:

synchronous and asynchronous access speed, memory size, system and browser engine reliability, memory authorization mode, and fault tolerance level.

3. The method of claim 2, wherein the target performance is represented by at least one of:

a set of performance parameters, a function of performance parameters, and a mapping between a number of performance levels and corresponding performance parameters.

4. The method of claim 1, wherein the performance parameters include at least one of:

processor speed, memory size, and caching schemes.

5. A method of managing cache in an eReading application, the method comprising:

receiving a target level of user experience for the eReading application;

determining a set of properties of a document to be displayed by the eReading application;

determining a set of parameters that are based on the received target level of user experience and document properties; and

allocating resources based on the determined set of parameters of the eReading application.

6. The method of claim 5, wherein the target level of user experience is a rank of performance levels from low to high determined by at least one of:

synchronous and asynchronous access speed, memory size, system and browser engine reliability, memory authorization mode, and fault tolerance level.

7. The method of claim 5, wherein the set of document properties include at least one of:

book metadata, page quality, font type and size, and image quality and size.

8. The method of claim 5, wherein the set of parameters include at least one of:

processor speed, memory size, and caching schemes.

9. The method of claim 5, further comprising tuning the set of parameters for another different target level of user experience.

10. The method of claim 5, further comprising adjusting the set of parameters for another document that has a different set of properties.

11. The method of claim 5, further comprising:

predownloading one or more document pages to be displayed by the eReading application; and

storing the predownloaded document pages in a cache.

12. The method of claim 11, wherein the predownloaded document pages including page, font, and image data are indexed by a hierarchy of multiple namespace levels in the cache.

13. A non-transitory computer-readable storage medium storing executable computer program instructions for providing consistent user experience in eReading, the computer program instructions comprising instructions for:

extracting a set of attributes of browsers and platforms on which an eReading application is running;

receiving a target eReading application performance;

adjusting behavior of the eReading application to compensate for difference between the extracted set of attributes and the target eReading application performance.

14. The storage medium of claim 13, wherein the set of attributes include at least one of:

synchronous and asynchronous access speed, memory size, system and browser engine reliability, memory authorization mode, and fault tolerance level.

15. The storage medium of claim 14, wherein the target performance is represented by at least one of:

a set of performance parameters, a function of performance parameters, and a mapping between a number of performance levels and corresponding performance parameters.

16. The storage medium of claim 13, wherein the performance parameters include at least one of:

processor speed, memory size, and caching schemes.

17. A non-transitory computer-readable storage medium storing executable computer program instructions for managing cache in an eReading application, the computer program instructions comprising instructions for:

receiving a target level of user experience for the eReading application;

determining a set of properties of a document to be displayed by the eReading application;

determining a set of parameters that are based on the received target level of user experience and document properties; and

allocating resources based on the determined set of parameters of the eReading application.

18. The storage medium of claim 17, wherein the target level of user experience is a rank of performance levels from low to high determined by at least one of:

synchronous and asynchronous access speed, memory size, system and browser engine reliability, memory authorization mode, and fault tolerance level.

19. The storage medium of claim 17, wherein the set of document properties include at least one of:

book metadata, page quality, font type and size, and image quality and size.

20. The storage medium of claim 17, wherein the set of parameters include at least one of:

processor speed, memory size, and caching schemes.

21. The storage medium of claim 17, wherein the computer program instructions further comprises instructions for tuning the set of parameters for another different target level of user experience.

22. The storage medium of claim 17, wherein the computer program instructions further comprises instructions for adjusting the set of parameters for another document that has a different set of properties.

23. The storage medium of claim 17, wherein the computer program instructions further comprises instructions for:

predownloading one or more document pages to be displayed by the eReading application; and

storing the predownloaded document pages in a cache.

24. The storage medium of claim 23, wherein the predownloaded document pages including page, font, and image data are indexed by a hierarchy of multiple namespace levels in the cache.