Crate ravenrs_perf 

The performance gate of RavenRS.

A PerfScene is a screen and the interactions to try on it. Bench::measure drives it with a real Ui and a real Renderer on an offscreen texture, without a window, and counts the work: builds, layouts, paints, shaping, allocations, draw calls and bytes sent to the GPU. Those counts are exact, so gate can compare them with a baseline on every run, where a time measured on a laptop would only be noise.

Times are measured apart by time, before a release.

Modules

capacity

How much the renderer can draw: each kind of work grows until a frame stops fitting.

scenes

Every scene the gate measures.

Structs

Bench

Where the measurements run: the GPU, and what counts allocations.

Ceiling

A limit on a counter, per round. A baseline can follow a slow decay; this cannot.

FrameTime

What one frame cost.

Outcome

What an interaction did.

PerfScene

A screen and the interactions to try on it.

Setup

A screen ready to be measured under one interaction.

Visit

One thing opened for the first or a later time: its worst frame, which is the one a person sees stutter. Warm frames say nothing about this.

Enums

Class

What a component is, which says what may be asked of it.

Constants

COUNTED_ROUNDS

Rounds counted, which ceilings are multiplied by.

REPORTED_ONLY

Counters that vary with the driver, so they are shown but never compared.

SCALE

Physical pixels per logical pixel: the laptop’s screen.

VIEWPORT

The window the scenes are measured in, in logical pixels.

Functions

ceiling

A shorter way to write a Ceiling.

hover_between

Moves the pointer back and forth between two places, as if crossing two controls.

hover_buttons

Moves the pointer back and forth between the first two buttons on screen, so every round really changes what is hovered, wherever the layout put them.

nothing

Nothing happens: what is left is what the screen does by itself.

resize

The window changes size by a pixel, which redoes everything from scratch.

scroll_at

Scrolls down and back up at position.

Type Aliases

Counters

Counts of the work done during the rounds counted, by name.

Step

One round of an interaction: true asks for a frame, as a platform does when Ui::handle_event says so.