Small source code optimizations. Clarified ULID advantages in `README.md`.#35

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Seramis merged 3 commits intoByteAether:mainfrom

Seramis:small_optimizations

Jan 15, 2026

Commits on Jan 15, 2026

Refactored ULID string formatting logic to remove redundant checks and improve overall performance. Added additional test for Unix timestamp and random input validation.
Seramis
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Removed "readonly" marker from methods where it is not necessary.
Seramis
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Updated README to clarify ULID advantages over GUIDs, highlight strict monotonicity, and address limitations in UUIDv7 implementations.
Seramis
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