Hi @mdhamed238

I’ve implemented a behavior-safe optimization for the createBuilder function, specifically targeting the common 2-argument case.

This version avoids Array.join overhead while preserving its coercion semantics:

• null / undefined → empty string (using == null)
• other values → String(value) (matching toString() behavior)

I’ve kept the change minimal and fallback to the existing .join(' ') logic for all other cases.

Would really appreciate your feedback on this approach. Thanks!