game compilation benchmark: 21811 source lines
  symta: <repo>/symta/symta.exe
  game:  <repo>/game

[cold]  51-54 s   123 modules   rc=0     (median of 2 runs)

[warm]  0.15-0.16 s   0 modules recompiled   rc=0

# Machine: w64devkit gcc 12.2.0 / Win64 / Intel i7-12700H class.
# Captured at commit 0b9e2c4 (CORE-1 v2 lineno side table just
# landed).  This is the steady-state cold compile after RT-2,
# RT-3, RT-8a, CORE-2, CORE-3, CORE-4 and CORE-1 v2; serves as
# the reference before RT-4..8 cache-locality work starts.
#
# What to watch:
#   - Cold should stay within ~10% of this band.  A jump means a
#     compiler / macroexpander / sif2sbc / sbc-load slowdown
#     somewhere; bisect by reverting the suspect change.
#   - Warm should stay under 0.20 s.  A regression here typically
#     means an sbc-load or dep-walk got expensive (e.g. linear
#     scans where a hash existed before).
