micheleandClaude Sonnet 5
e809b71806
Fresh 8-seed sweep after DEC-0043's arbiter/mux fix: - N=4: worst 82.43MHz (was 81.20MHz), mean 89.48MHz (was 91.05MHz) - a wash. - N=8: worst 77.36MHz (was 80.97MHz), mean 80.71MHz (was 84.62MHz) - a real, measured regression, though still 8/8 PASS at 64MHz with +21% margin. P&R is a stochastic heuristic search; removing logic from one path can shift the placer onto a different, coincidentally worse-mapped critical path for this specific seed set. Not a functional regression - both configs remain closed. Keeping the fix regardless: it's bit-exact and removes a known-bad pattern that gets worse as N_SLOTS grows toward 16, even though it didn't pay off in Fmax at today's N=8. Full numbers and interpretation in timing.log. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>