[Feature]: SnakeYamlOps deepCopy() significantly slower than Jackson's built-in

[Splatcrafter]

AI REVIEWED

Module: codec
File: codec/yaml/snakeyaml/SnakeYamlOps.java (~line 1259-1284)
Severity: Low

Problem / Motivation

SnakeYamlOps implements deepCopy() manually with recursive Java code (creating new ArrayLists, LinkedHashMaps, etc.), while Jackson-based implementations delegate to the optimized JsonNode.deepCopy(). For large data structures, this makes SnakeYAML operations measurably slower.

Proposed Solution

Consider optimizing the deep copy:

1. Use iterative approach with explicit stack (avoids method call overhead)
2. Profile to determine if this is actually a bottleneck in practice
3. If not a bottleneck, document the performance characteristic

Alternatives

Document that SnakeYAML is slower for large structures and recommend Jackson-based implementations for performance-sensitive use cases.