diff --git a/src/lib/studio/triz-data.test.ts b/src/lib/studio/triz-data.test.ts
index f2ed9cf0..20c85e58 100644
--- a/src/lib/studio/triz-data.test.ts
+++ b/src/lib/studio/triz-data.test.ts
@@ -88,5 +88,20 @@ describe('triz-data', () => {
       // Maximum values
       expect(lookupPrinciples(39, 39)).toBeDefined()
     })
+
+    it('performance: completes full matrix lookup (39x39 pairs) rapidly', () => {
+      const start = performance.now()
+      let totalPrinciples = 0
+      for (let i = 1; i <= 39; i++) {
+        for (let j = 1; j <= 39; j++) {
+          const res = lookupPrinciples(i, j)
+          totalPrinciples += res.length
+        }
+      }
+      const duration = performance.now() - start
+      expect(totalPrinciples).toBeGreaterThan(0)
+      // 1521 lookups should take well under 50ms with O(1) Map indexing
+      expect(duration).toBeLessThan(50)
+    })
   })
 })
diff --git a/src/lib/studio/triz-data.ts b/src/lib/studio/triz-data.ts
index c5c2580d..a1fcd0e1 100644
--- a/src/lib/studio/triz-data.ts
+++ b/src/lib/studio/triz-data.ts
@@ -28,6 +28,9 @@ const TRIZ_MATRIX: Record<string, number[]> = {
 /** Re-exported merged contradiction matrix. */
 export { TRIZ_MATRIX }
 
+/** Pre-indexed map for O(1) principle lookups by ID. */
+const PRINCIPLES_BY_ID = new Map(TRIZ_PRINCIPLES.map((p) => [p.id, p]))
+
 /** Look up inventive principles for an improving/worsening parameter pair. */
 export function lookupPrinciples(
   improving: number,
@@ -36,7 +39,7 @@ export function lookupPrinciples(
   const key = `${improving}-${worsening}`
   const ids = TRIZ_MATRIX[key] ?? []
   return ids
-    .map((id) => TRIZ_PRINCIPLES.find((p) => p.id === id))
+    .map((id) => PRINCIPLES_BY_ID.get(id))
     .filter((p): p is (typeof TRIZ_PRINCIPLES)[number] => p !== undefined)
 }