diff --git a/packages/@lwc/perf-benchmarks-components/src/benchmark/expression/expression.html b/packages/@lwc/perf-benchmarks-components/src/benchmark/expression/expression.html
index 465cb4a1ee..280488726d 100644
--- a/packages/@lwc/perf-benchmarks-components/src/benchmark/expression/expression.html
+++ b/packages/@lwc/perf-benchmarks-components/src/benchmark/expression/expression.html
@@ -5,7 +5,33 @@
 For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
 -->
 <template>
+  <!-- Basic expressions (already working) -->
   <div data-foo="{expr1()}"></div>
   <p class="{expr2.expr21.expr22}"></p>
   <p>{expr3[0]['expr3' + '3']}</p>
+  
+  <!-- Complex expressions that require experimentalComplexExpressions -->
+  <div class="{`complex-${expr1()}-${expr2.expr21.expr22}`}">
+    {`Template literal: ${expr1()} and ${expr2.expr21.expr22}`}
+  </div>
+  
+  <p data-computed="{expr1() ? 'truthy' : 'falsy'}">
+    {expr1() ? 'Conditional: ' + expr1() : 'Default value'}
+  </p>
+  
+  <div class="{expr2?.expr21?.expr22 || 'fallback'}">
+    {expr2?.expr21?.expr22 ?? 'nullish fallback'}
+  </div>
+  
+  <p data-array="{expr3.map(item => item.expr33).join(', ')}">
+    {expr3.length > 0 ? `Array length: ${expr3.length}` : 'Empty array'}
+  </p>
+  
+  <div class="{expr1() === 'bar' ? 'matched' : 'not-matched'}">
+    {expr1() === 'bar' ? 'String comparison works!' : 'String comparison failed'}
+  </div>
+  
+  <p data-object="{JSON.stringify({nested: expr2, computed: expr1()})}">
+    {`Object: ${JSON.stringify({nested: expr2, computed: expr1()})}`}
+  </p>
 </template>
\ No newline at end of file
diff --git a/packages/@lwc/perf-benchmarks-components/src/benchmark/expression/expression.js b/packages/@lwc/perf-benchmarks-components/src/benchmark/expression/expression.js
index c5152b4e36..71bda0e955 100644
--- a/packages/@lwc/perf-benchmarks-components/src/benchmark/expression/expression.js
+++ b/packages/@lwc/perf-benchmarks-components/src/benchmark/expression/expression.js
@@ -13,4 +13,27 @@ export default class Sample extends LightningElement {
 
     expr2 = { expr21: { expr22: 'expr22' } };
     expr3 = [{ expr33: 'expr33' }];
+
+    // Additional data for complex expression testing
+    get complexData() {
+        return {
+            string: 'test',
+            number: 42,
+            boolean: true,
+            array: [1, 2, 3, 4, 5],
+            nested: {
+                deep: {
+                    value: 'nested value',
+                },
+            },
+        };
+    }
+
+    get computedValue() {
+        return this.expr1() + '_computed';
+    }
+
+    get conditionalValue() {
+        return this.expr2?.expr21?.expr22 ? 'hasValue' : 'noValue';
+    }
 }