Incremental Webpage Markup Scanning for Browser Responsiveness
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Solution Overview
Problem
Scanning large portions of webpage markup can lead to unresponsiveness, as it takes significant time and may appear as if the browser is idle, especially in browsers that cannot indicate when a frame is rendered.
Innovation Solution
Implement a method where the browser scans markup in portions, pausing after a predetermined time threshold (e.g., 20 milliseconds) to render a frame and then resumes scanning, allowing for incremental scanning without user detection of pauses, enabling dynamic updates and reducing bandwidth and processing requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the browser scans large portions of webpage markup continuously, then bindings can be identified completely, but the browser becomes unresponsive and appears idle
Solution Approach 1:
The patent divides the continuous markup scanning process into discrete segments interrupted by frame rendering intervals. The scan pauses after scanning a portion of the markup (e.g., 20 milliseconds worth) to allow the browser to render a frame and maintain responsiveness. This segmentation allows the scanning to be completed eventually while preventing the browser from appearing unresponsive during any single scan interval.
2Ease of operation
If the browser pauses scanning to render frames, then browser responsiveness is maintained, but scanning time increases
Solution Approach 1:
The patent maintains continuous progress in markup scanning by resuming the scan after each frame rendering pause. Rather than abandoning or restarting the scan, the browser picks up where it left off in the markup, ensuring that the useful action of binding identification continues uninterrupted across multiple rendering cycles. This approach minimizes total scanning time while maintaining responsiveness during pauses.
3Measurement precision
If the browser scans the entire markup before rendering, then all bindings are identified, but frame rendering cannot occur dynamically
Solution Approach 1:
The patent performs preliminary scanning of markup portions before each frame rendering, identifying bindings that can be applied immediately. This preliminary action allows the browser to prepare binding information in advance of rendering without waiting for complete markup analysis, enabling faster frame rendering while progressively building up complete binding knowledge as scanning continues.
Data Source
AI summary
Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for scanning bindings in a webpage. In one aspect, a method includes obtaining, at a browser of a client device, markup for a webpage, initiating a scan of the markup for the webpage to identify bindings in the markup, in response to a time threshold being satisfied during the scan of the markup for the webpage, pausing the scan of the markup and storing location data corresponding to a location in the markup reached by the scan at pause time, rendering, by the browser, a next frame for the webpage, and in response to completion of the rendering of the next frame for the webpage, resuming the scan of the markup for the webpage at the location in the markup.