Module diff 

Two recordings compared (ADR 0058, decision 12): each span’s and phase’s spread, the burns, the gaps and the counters, before and after — kui-trace diff A B, with --fail-over a CI’s threshold.

Spans are matched by their name’s text and origin, never by id: ids and name ids differ between two recordings of one session. What a span or a gap costs is a frame’s share (its total over the frames), so two recordings of one script compare even when one ran a few frames longer.

Report::worst_growth reads only the rows that say what a frame costs and that were big enough before to say it (Unit::counts): a time of at least NOISE_US (below it, a timer’s jitter is a large share of nothing), and a rate of at least one a frame. A maximum, a count, a share and vsync’s wait are shown and never counted: one outlier frame, a recording’s length and a faster render (which waits longer) are not regressions.

Structs

Report

What changed from a to b.

Enums

Unit

What a row counts.

Constants

MARK

The growth Report::text marks.

NOISE_RATE

Below this many a frame before, a rate row’s growth is noise.

NOISE_US

Below this many µs before, a time row’s growth is noise.

Functions

diff

a against b.