Scripting Application Privacy Mode Coordination
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Solution Overview
Problem
The increasing complexity and functionality of web applications, particularly those using Asynchronous JavaScript and XML (AJAX), make it challenging to accurately record and replay scripts for load testing while maintaining high performance, as layout rendering is a CPU-intensive task and existing browser engines retain resources across iterations, complicating the simulation of new users.
Innovation Solution
Employing the 'privacy mode' feature of a browser engine to reset user state data at the beginning of each iteration, ensuring that each script execution starts from a blank state, and using a real browser engine for accurate DOM emulation and delegation of JavaScript handling to maintain performance and scalability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If layout rendering is performed to ensure DOM accuracy, then measurement precision is improved, but use of energy increases due to CPU-intensive tasks
Solution Approach 1:
The system performs layout rendering and DOM analysis in advance during script recording, storing the results for later reuse during replay. This preliminary action eliminates the need to perform CPU-intensive rendering operations repeatedly during load testing, thus maintaining DOM accuracy while reducing energy consumption during actual testing iterations.
Solution Approach 2:
The system creates and uses copies of DOM structures and layout information rather than performing full rendering operations during each test iteration. By capturing the DOM structure during recording and using replicated versions during replay, the system maintains measurement precision without the associated energy costs of repeated rendering.
2Productivity
If browser engine retains resources across iterations, then productivity is improved through resource reuse, but reliability deteriorates due to inability to simulate new users
Solution Approach 1:
The system segments the testing process into distinct recording and replay phases, with separate resource management for each. During recording, resources are allocated and DOM structures are built. During replay, the system uses stored DOM copies rather than retained browser resources, ensuring each iteration starts fresh while maintaining productivity through reuse of recorded script data.
Solution Approach 2:
The system discards browser engine resources between recording and replay phases, ensuring clean state for each iteration. By recovering only the essential script data and DOM structure information while discarding session-specific resources like cookies and cached data, the system maintains both reliability for new user simulation and productivity through selective resource reuse.
3Reliability
If privacy mode is enabled to reset user state data, then reliability is improved for new user simulation, but device complexity increases due to mode switching coordination
Solution Approach 1:
The system merges the privacy mode activation with the existing iteration start event in the testing framework. By combining these two actions into a single coordinated operation at the beginning of each iteration, the system achieves reliable user state isolation without proportionally increasing complexity, as the privacy mode switching is integrated into the existing test lifecycle management.
Data Source
AI summary
In at least some embodiments, a computer system includes a processor and a computer-readable storage medium coupled to the processor and storing a scripting application. The scripting application, when executed, is configured to coordinate use of a browser engine privacy mode with emulation of user operations on a browser-hosted application.