RenderMeasureTask

`construct.render.measure`: render 1 to 3 frames of the scene off screen with the render job's renderer, size and quality, write nothing, and answer the seconds per frame and for the whole range (§CRSA-5, matrix CRS-25).

In the namespace construct::opal. Declared in src/libs/libconstruct/construct/opal/RenderTasks.hpp.

Detailed description

A job of its own on the render queue, through the one request builder, so it measures what Queue would render. The measure becomes the scene's last measure, which the Rendering window's cost line shows.