Legacy and v1 reads on 64 KiB, redb pull_all and compare-and-swap on 104 KiB,
and one Largest level on 88 KiB, the sizes where a plain from_slice or a missing
outer maybe_grow dies in release as well as debug.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Measured on Yggdrasil: the decode needs 56 KiB (Wide32) and 80 KiB (Largest) in
debug on a thread that returns a bool; returning the record through
std::thread's own frames adds several copies of it, so the tests box it and
size threads at 96 KiB and from 160 KiB.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
A payload inside the 256 nesting bound no longer depends on the caller's
thread stack: the rmp-serde deserializer runs under serde_stacker with a
256 KiB red zone and 2 MiB segments. Adds tests/decode_stack.rs (child
process per test, sized decode thread) and renames the 2 MiB union_parity
stack test to a 1 MiB pin.
Not yet built or run at this commit.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
