[zackees]

Why

bench/fastled-examples carries the AC#5 gate (--max-warm-ms 50), but its
documented sample table was captured 2026-05-10 on Windows and its AC#5 text
claims "roughly 25× headroom over current ~1-2 ms warm timings". Neither
matches what the bench actually prints on this repo's Linux dev hosts: warm is
31-41 ms there, so the gate has 1.2-4.5× headroom, not 25×. A near-50 ms
warm number reads as noise under the old text; it is in fact a possible
resolver or host-load regression.

This is docs-only (README + one doc comment). No behaviour change, no test
change, no threshold change — the 50 ms AC#5 gate is untouched.

Measured (real output, not inferred)

NixOS, 16-core x86_64, soldr cargo run --release -p fbuild-bench-fastled-examples --bin bench-fastled-examples -- --max-warm-ms 50,
FASTLED_DIR=/home/niteris/dev/fastled, two consecutive runs at host load
2.7-15.5, all rows hit=yes, both runs exit 0:

example	cold (ms)	warm (ms)	speedup
Blink	80-94	32-39	2.1x
Pacifica	76-79	33-34	2.2x
Animartrix	91-91	36-41	2.2x
Audio	78-79	32-33	2.4x
BlurBenchmark	75-77	31-33	2.3x
Chromancer	80-82	33-34	2.4x

The 2026-05 Windows row is kept verbatim as the historical baseline; the new
Linux table is additive and dated, and notes that warm spread tracks host load.

Gates run

• soldr cargo check --release -p fbuild-bench-fastled-examples --all-targets —
  rc 0 (Finished release profile in 13.73s).
• AC#5 gate itself exercised twice by the two bench runs above (rc 0 both).

No Rust logic changed, so the full bash test suite was not re-run.

Refs #205.

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