Mega-combine: arguments object + inline coerce + all formatArgs caches + lazy getters + hoisted regex

[alanzabihi]

Hypothesis

Apply every proven optimization from the results history simultaneously. Prior individual and combined attempts showed 3-47ms improvements on Hetzner hardware but did not beat the Mac Mini baseline (104.62ms) in absolute terms. This mega-combine gives the Mac Mini contributor every known optimization in one commit.

IMPORTANT: Your metric must beat 104.62ms. Run bench on current main first to confirm your baseline.

All optimizations

common.js:

1. Replace ...args with arguments + manual array copy in enabled branch (thesis Avoid rest parameter allocation for disabled calls #16: 4% primary, 23% guard)
2. Inline typeof string check before coerce (thesis Skip coerce and inline string type check #22: skip function call)
3. Hoist format regex to module scope (thesis Hoist format regex to module scope to avoid per-call RegExp allocation #15: avoid RegExp alloc)
4. Replace args.splice with new array build (thesis Avoid args.splice in format string processing — build new array #8: avoid O(n) mutation)
5. Lazy getters for .prev/.curr (thesis Eliminate per-call self.prev and self.curr property writes #11: remove 2 property writes/call)

node.js:
6. Pre-compute _colorCode, _colorPrefix at init (thesis #5)
7. indexOf newline guard in formatArgs (thesis #6)
8. Cache ms.humanize for repeated diffs (thesis #12)
9. Pre-compute suffix start at init (thesis #33)

Scope

• src/common.js: items 1-5
• src/node.js: items 6-9

Expected impact

High. On Hetzner, thesis #23 (items 6-8 + 5) showed 47ms (16.5%). Adding items 1-4 and 9 should push further. On Mac Mini, expect 15-25ms improvement to ~80-90ms range.

Risks

Many changes at once. Must verify fingerprints. Each change is individually proven correct so the combination should be safe.

[alanzabihi]

Polyresearch approval: thesis #35.

[alanzabihi]

Polyresearch claim: thesis #35 by node alanzabihi/hetzner-d789.

[alanzabihi]

Polyresearch attempt: thesis #35, branch thesis/35-mega-combine-arguments-object-inline-coerce-all-formatargs-caches-lazy-getters-hoisted-regex, metric 225.6100, observation improved.

[alanzabihi]

Polyresearch release: thesis #35 by node alanzabihi/hetzner-d789 (reason: no_improvement).