diff --git a/graalpython/com.oracle.graal.python.benchmarks/python/macro/c-ujson-loads.py b/graalpython/com.oracle.graal.python.benchmarks/python/macro/c-ujson-loads.py
new file mode 100644
index 0000000000..908dffd7d3
--- /dev/null
+++ b/graalpython/com.oracle.graal.python.benchmarks/python/macro/c-ujson-loads.py
@@ -0,0 +1,92 @@
+# Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# The Universal Permissive License (UPL), Version 1.0
+#
+# Subject to the condition set forth below, permission is hereby granted to any
+# person obtaining a copy of this software, associated documentation and/or
+# data (collectively the "Software"), free of charge and under any and all
+# copyright rights in the Software, and any and all patent rights owned or
+# freely licensable by each licensor hereunder covering either (i) the
+# unmodified Software as contributed to or provided by such licensor, or (ii)
+# the Larger Works (as defined below), to deal in both
+#
+# (a) the Software, and
+#
+# (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
+# one is included with the Software each a "Larger Work" to which the Software
+# is contributed by such licensors),
+#
+# without restriction, including without limitation the rights to copy, create
+# derivative works of, display, perform, and distribute the Software and make,
+# use, sell, offer for sale, import, export, have made, and have sold the
+# Software and the Larger Work(s), and to sublicense the foregoing rights on
+# either these or other terms.
+#
+# This license is subject to the following condition:
+#
+# The above copyright notice and either this complete permission notice or at a
+# minimum a reference to the UPL must be included in all copies or substantial
+# portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+import json
+
+ensure_packages(ujson="5.11.0")
+import ujson
+
+
+def make_event(index):
+    return {
+        "id": index,
+        "type": ("PushEvent", "IssuesEvent", "PullRequestEvent")[index % 3],
+        "actor": {
+            "id": 10_000 + index,
+            "login": f"user-{index % 128}",
+            "display_login": f"User {index % 128}",
+            "url": f"https://api.github.com/users/user-{index % 128}",
+        },
+        "repo": {
+            "id": 20_000 + index % 64,
+            "name": f"graalpy/project-{index % 64}",
+            "url": f"https://api.github.com/repos/graalpy/project-{index % 64}",
+        },
+        "payload": {
+            "repository_id": 20_000 + index % 64,
+            "ref": f"refs/heads/feature-{index % 32}",
+            "before": f"{index:040x}",
+            "head": f"{index + 1:040x}",
+            "size": 3,
+            "commits": [
+                {
+                    "sha": f"{index * 3 + commit:040x}",
+                    "author": {"email": f"user{commit}@example.com", "name": f"Author {commit}"},
+                    "message": f"Update benchmark data {index}:{commit}",
+                    "distinct": commit != 1,
+                }
+                for commit in range(3)
+            ],
+        },
+        "public": index % 5 != 0,
+        "created_at": f"2026-07-{index % 28 + 1:02d}T{index % 24:02d}:{index % 60:02d}:00Z",
+    }
+
+
+JSON_LINES = tuple(
+    json.dumps(make_event(index), ensure_ascii=False, separators=(",", ":")).encode() for index in range(512)
+)
+
+
+def __benchmark__(iterations=150):
+    result = None
+    for _ in range(iterations):
+        for line in JSON_LINES:
+            result = ujson.loads(line)
+    return result
diff --git a/mx.graalpython/mx_graalpython_bench_param.py b/mx.graalpython/mx_graalpython_bench_param.py
index 4c06cac338..3a8515246f 100644
--- a/mx.graalpython/mx_graalpython_bench_param.py
+++ b/mx.graalpython/mx_graalpython_bench_param.py
@@ -316,6 +316,7 @@ def _pickling_benchmarks(module='pickle'):
     'c-pydantic-validation-errors': ITER_10 + ['1000'],
     'c-pymupdf-parse': ITER_10 + ['1'],
     'c-oracledb-load': ITER_5 + ['2000000'],
+    'c-ujson-loads': ITER_10 + ['150'],
 }