Soul measured the owned math at 1.7-2.6x the crate's time at realistic sizes
(16+4 x 1200 B encode 64k -> 122k ns), because combine called gf_mul per byte:
two zero checks and three lookups. combine now tabulates each coefficient's
256 products once and spends one lookup and one XOR per byte; coefficient 0
is skipped and 1 is a plain XOR. The construction and every wire byte are
unchanged: the known-answer fixture passes untouched.
tests/media_fec_bench.rs is an ignored, dependency-free timing test over the
public surface (4+2 at 160 and 1300 B, 16+4 at 1200 B, 255+1 at 1300 B):
cargo test --release --test media_fec_bench -- --ignored --nocapture
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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