diff --git a/.jules/bolt.md b/.jules/bolt.md
index 8ce7ce8f7..4c65605a4 100644
--- a/.jules/bolt.md
+++ b/.jules/bolt.md
@@ -77,3 +77,7 @@
 ## 2024-11-20 - Optimize multiple tuple generation from a single collection
 **Learning:** `build_rule_metadata` derives exactly two collections, `owasp` and `cwe`, from the same references. Replacing its two generator traversals with one explicit loop reduces element visits from about 2N to N. Both versions remain O(N), so this is a constant-factor optimization rather than an asymptotic complexity improvement.
 **Action:** Combine repeated traversal when fixed derived collections share one source, while preserving ordering and classification semantics. Benchmark the production hot path before claiming a material wall-clock improvement.
+
+## 2026-10-05 - 제너레이터 대신 컴프리헨션 사용 최적화
+**Learning:** Python에서 tuple()이나 dict.fromkeys()에 제너레이터를 전달하면 오버헤드가 크므로, 리스트나 딕셔너리 컴프리헨션을 사용하여 C 속도로 처리해야 한다.
+**Action:** Hot path에서는 제너레이터 대신 [ ]나 { }로 감싼 컴프리헨션을 tuple() 생성자 등에 전달한다.
diff --git a/appguardrail_core/findings.py b/appguardrail_core/findings.py
index 5e0c28b43..87c563d36 100644
--- a/appguardrail_core/findings.py
+++ b/appguardrail_core/findings.py
@@ -106,10 +106,10 @@ def normalize_findings(
     snippet_max_len: int = 400,
 ) -> tuple[dict[str, Any], ...]:
     """Normalize a finding collection into a stable tuple."""
-    return tuple(
+    return tuple([
         normalize_finding(finding, snippet_max_len=snippet_max_len)
         for finding in findings
-    )
+    ])
 
 
 def severity_counts(findings: Iterable[dict[str, Any]]) -> dict[str, int]:
diff --git a/appguardrail_core/rules.py b/appguardrail_core/rules.py
index c06ea203a..a616f1794 100644
--- a/appguardrail_core/rules.py
+++ b/appguardrail_core/rules.py
@@ -106,12 +106,10 @@ def as_dict(self) -> dict[str, Any]:
 
 def extract_public_references(message: str) -> tuple[str, ...]:
     """Extract OWASP, CWE, and CVE references already embedded in rule copy."""
-    return tuple(
-        dict.fromkeys(
-            " ".join(match.group(1).split())
-            for match in REFERENCE_RE.finditer(message or "")
-        )
-    )
+    return tuple({
+        " ".join(match.group(1).split()): None
+        for match in REFERENCE_RE.finditer(message or "")
+    })
 
 
 def _category_for_references(references: tuple[str, ...], fallback: str) -> str:
@@ -174,8 +172,7 @@ def validate_rule_metadata(metadata: RuleMetadata | dict[str, Any]) -> list[str]
 
 
 def _merge_references(*groups: tuple[str, ...]) -> tuple[str, ...]:
-    return tuple(
-        dict.fromkeys(
-            reference for group in groups for reference in group if reference
-        )
-    )
+    return tuple({
+        reference: None
+        for group in groups for reference in group if reference
+    })