Composing a box within another is four multiplies an axis, and two of the
shapes it is asked for compose to nothing: a part that is the whole box is
the box, and a box composed through the whole of its parent is itself. Both
are exact -- multiplying by one on the grid rounds to what it started as --
so four comparisons answer what four multiplies would have.
`many` over 500 frames: 1,742,553,104 instructions to 1,705,786,553, 2.1%
fewer, and 660M cycles to 658M. The cycles are the honest number and they
say this is worth little here; it is kept because instructions are what a
phone pays for and the check is four comparisons.
Checked: fmt, clippy, 105 tests, all five shrinker cases at 300 seeds, the
100-seed generated oracle, and `tabs`, `text` and `random` byte-identical at
1920x1200.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
iris-aiandClaude Opus 5
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