METHOD FOR IMPROVING BACKWARD/FORWARD PERFORMANCE BETWEEN CERTAIN TYPES OF DYNAMIC WEB PAGES

• US 20130275853A1
• Filed: 09/26/2012
• Published: 10/17/2013
• Est. Priority Date: 04/13/2012
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc.
• Inventors: EIDSON, Brady K., LIU, Alice, CHAN, Ada Y.
• Granted Patent: US 9,177,077 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

A method for improving backward and forward web browser performance is described. In one embodiment, backward and forward web performance is enhanced by ignoring unload handler scripts and caching web pages. Web elements with unload handler scripts are examined. In a first pass, if the web page elements are not determined to be significant, then the related unload handler scripts can be ignored, enabling the web page to be cached. In a second pass, if the web page element is significant, but the unload handler script is determined to be insignificant, then the unload handler script can be ignored and the web page can be cached.

Claims

1. A method for caching web page data for a requested web page displayable through a web browser, the method comprising:

receiving web page data associated with the requested web page;

creating a first document object model (DOM) from the web page data, the first DOM including at least a second DOM;

examining the second DOM when the second DOM includes an unload handler script that prevents web page data from being stored in cache; and

,

caching the web page data and ignoring the unload handler script from the second DOM when the second DOM is related to a third party, is not displayed or is not a visually significant DOM.

2. The method of claim 1, wherein second DOM is related to a third party when the second DOM includes a domain that is different from a domain included in the first DOM.

3. The method of claim 1, wherein the second DOM is not displayed when the second DOM is hidden;

4. The method of claim 1, wherein the second DOM is not displayed when the second DOM is displayed off of the visual screen.

5. The method of claim 1, wherein the second DOM is visually significant when the second DOM is greater than or equal to a predetermined percentage of a displayed web page of the first DOM.

6. The method of claim 5, wherein the predetermined percentage is 20%.

7. The method of claim 1, wherein the second DOM is visually significant when the second DOM is inside a content flow of a web page determined by the first DOM.

8. A method for determining when web page data can be cached, the method comprising:

receiving web page data for a requested web page;

building a document object model (DOM) of the web page, wherein the DOM can include one or more unload handler scripts that prevent the web page data from being cached when the unload handler script is executed; and

ignoring the one or more unload handler scripts and caching the web page data when the unload handler script only affects local variables.

9. The method of claim 8, wherein the unload handler scripts that only affects local variables includes a script that sets only a local storage value.

10. The method of claim 8, wherein the unload handler scripts that only affects local variables includes a script that does not interact with a network.

11. The method of claim 8, wherein the unload handler scripts that only affects local variables includes a script that only performs reads.

12. The method of claim 8, wherein the unload handler scripts that only affects local variables includes a script that does not set a cookie.

13. The method of claim 8, wherein the unload handler scripts that only affects local variables includes a script that only contacts a server directly related to the domain of the DOM.

14. Non-transient computer readable medium for storing computer code executable by a processor in a computer system for caching web data used for constructing web pages and displaying web pages through a web browser, the computer readable medium comprising:

computer code for receiving web page data associated for a requested web page document;

computer code for creating a hierarchical document object model (DOM) from the web page data;

computer code for examining DOMs comprising unload handler scripts that prevent web page data from being stored in a cache when the unload handler script is executed, wherein the examined DOMs are included in the hierarchical DOM; and

computer code for caching web page data and ignoring the unload handler script of the examined DOMs when the examined DOMs are related to a third party, are not displayed or not visually significant.

15. The non-transient computer readable medium as recited in claim 14, wherein the third party DOM includes a domain that is different from the domain for the hierarchical DOM.

16. The non-transient computer readable medium as recited in claim 14, wherein the examined DOM is not displayed when the DOM is hidden from view.

17. The non-transient computer readable medium as recited in claim 14, wherein the examined DOM is not displayed when the DOM is displayed off of the visual screen.

18. The non-transient computer readable medium as recited in claim 14, wherein the examined DOM is not visually significant when the DOM is less than a predetermined amount of a displayed web page.

19. The non-transient computer readable medium as recited in claim 14, wherein the examined DOM is not visually significant when the DOM is less than 20% of a displayed web page.

20. The non-transient compute readable medium as recited in claim 14, wherein the examined DOM is not visually significant when the DOM is outside a content flow of a displayed web page related to the hierarchical DOM.