Description

This PR fixes an issue where Date.now() was being called in the memo function even when debug mode was disabled. This was causing React hydration mismatch warnings in Next.js applications because the rendering timestamp differed between server and client.

🎯 Changes

• Modified packages/table-core/src/utils.ts to check opts.debug?.() result before calling Date.now().
• This ensures Date.now() is only invoked when debugging is actually active.

🩹 Fixes

• Tests: Fixed a TypeScript error in memo.test.ts where the test mock signature (a: number) caused a type mismatch with the memo utility. Updated to (a?: number) to allow optional arguments.

✅ Checklist

• I have followed the steps in the Contributing guide.
• I have tested this code locally with pnpm test:pr.

🚀 Release Impact

• This change affects published code, and I have generated a changeset.
• This change is docs/CI/dev-only (no release).

Summary by CodeRabbit

• Refactor

  • Streamlined internal debug logic and measurement flow without changing any public behavior or API.

• Tests

  • Added tests to verify memoization and debug-timing behavior, ensuring timing/logging only occurs when debug is enabled and core functionality remains unchanged.

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