Unified Rendering Light Speed in Web Dynpro ABAP

Use

Unified Rendering Light Speed (URLS, LS) is a new rendering technology that is generally supported and used by Web Dynpro ABAP.

Among other things, this new rendering technology provides the following:

Performance improvements for browser rendering
Load-on-demand for JavaScript
Inline CSS

This means less administration effort for the browser, since only the stylesheets that are actually required are sent to the browser.
Nova Design
Possibility of embedding Adobe FlashIsland applications
New Web Dynpro UI elements such as Drag&Drop
New properties, events, and aggregations for UI elements

The new technology improves the performance of rendering. Rendering is quicker and less resources are consumed on the front end (browser).

All Web Dynpro ABAP applications will be rendered using URLS in the future, rather than with traditional rendering. For end users, the only difference will be quicker response times and a slightly different layout. UI elements and their properties, events, aggregations, and enumerations will now only be updated for the new rendering technology.

More Information: SAP Note 1107662 Information published on SAP site

Differences Between Unified Rendering Light Speed and Traditional Rendering

New UI elements
New properties: hotkey and activateAccessKey
Various new properties, events, and aggregations
Use of Web2.0 technology (AJAX)
Fewer roundtrips
Design Adjustments
Deactivation of buttons in popups; see Calling Dialog Boxes of the Same Component
New method IF_WD_VIEW~SCROLL_INTO_VIEW

Settings

The following parameters are available for activating the new rendering:

WDLIGHTSPEED application parameter
sap-wd-lightspeed URL parameter

By default, these parameters have the value X.

More information: Application Parameters and URL Parameters