diff --git a/Modules/_testcapimodule.c b/Modules/_testcapimodule.c
index 20107f2257..18d3fd7dcd 100644
--- a/Modules/_testcapimodule.c
+++ b/Modules/_testcapimodule.c
@@ -5449,7 +5449,46 @@ test_fatal_error(PyObject *self, PyObject *args)
     Py_RETURN_NONE;
 }
 
+static PyObject *
+test_bench_incref(PyObject *module, PyObject *args)
+{
+    Py_ssize_t nloop;
+    PyObject *list;
+
+    if (PyArg_ParseTuple(args, "nO!", &nloop, &PyList_Type, &list) < 0) {
+        return NULL;
+    }
+
+    Py_ssize_t len = PyList_Size(list);
 
+    struct timespec start;
+    clock_gettime(CLOCK_MONOTONIC, &start);
+
+    for (Py_ssize_t loop=0; loop < nloop; loop++) {
+        PyObject **dst = PyMem_Malloc(len * sizeof(PyObject*));
+        if (dst == NULL) {
+            PyErr_NoMemory();
+            return NULL;
+        }
+        for (Py_ssize_t i=0; i < len; i++) {
+            PyObject *item = PyList_GetItem(list, i);
+            Py_INCREF(item);
+            dst[i] = item;
+        }
+        for (Py_ssize_t i=0; i < len; i++) {
+            PyObject *item = dst[i];
+            Py_DECREF(item);
+        }
+        PyMem_Free(dst);
+    }
+
+    struct timespec stop;
+    clock_gettime(CLOCK_MONOTONIC, &stop);
+
+    int64_t a = start.tv_sec * 1000000000 + start.tv_nsec;
+    int64_t b = stop.tv_sec * 1000000000 + stop.tv_nsec;
+    return PyFloat_FromDouble((b - a) / 1e9);
+}
 
 static PyMethodDef TestMethods[] = {
     {"raise_exception",         raise_exception,                 METH_VARARGS},
@@ -5719,6 +5758,7 @@ static PyMethodDef TestMethods[] = {
     {"test_refcount", test_refcount, METH_NOARGS},
     {"fatal_error", test_fatal_error, METH_VARARGS,
      PyDoc_STR("fatal_error(message, release_gil=False): call Py_FatalError(message)")},
+    {"bench_incref", test_bench_incref, METH_VARARGS, NULL},
     {NULL, NULL} /* sentinel */
 };
 
diff --git a/Modules/xxlimited.c b/Modules/xxlimited.c
index 883c8a9b5e..8d3e9b1574 100644
--- a/Modules/xxlimited.c
+++ b/Modules/xxlimited.c
@@ -274,7 +274,46 @@ xx_new(PyObject *module, PyObject *Py_UNUSED(unused))
     return (PyObject *)rv;
 }
 
+static PyObject *
+xx_bench_incref(PyObject *module, PyObject *args)
+{
+    Py_ssize_t nloop;
+    PyObject *list;
+
+    if (PyArg_ParseTuple(args, "nO!", &nloop, &PyList_Type, &list) < 0) {
+        return NULL;
+    }
+
+    Py_ssize_t len = PyList_Size(list);
+
+    struct timespec start;
+    clock_gettime(CLOCK_MONOTONIC, &start);
+
+    for (Py_ssize_t loop=0; loop < nloop; loop++) {
+        PyObject **dst = PyMem_Malloc(len * sizeof(PyObject*));
+        if (dst == NULL) {
+            PyErr_NoMemory();
+            return NULL;
+        }
+        for (Py_ssize_t i=0; i < len; i++) {
+            PyObject *item = PyList_GetItem(list, i);
+            Py_INCREF(item);
+            dst[i] = item;
+        }
+        for (Py_ssize_t i=0; i < len; i++) {
+            PyObject *item = dst[i];
+            Py_DECREF(item);
+        }
+        PyMem_Free(dst);
+    }
+
+    struct timespec stop;
+    clock_gettime(CLOCK_MONOTONIC, &stop);
 
+    int64_t a = start.tv_sec * 1000000000 + start.tv_nsec;
+    int64_t b = stop.tv_sec * 1000000000 + stop.tv_nsec;
+    return PyFloat_FromDouble((b - a) / 1e9);
+}
 
 /* List of functions defined in the module */
 
@@ -283,6 +322,8 @@ static PyMethodDef xx_methods[] = {
         xx_foo_doc},
     {"new",             xx_new,         METH_NOARGS,
         PyDoc_STR("new() -> new Xx object")},
+    {"bench_incref",             xx_bench_incref,         METH_VARARGS,
+        PyDoc_STR("new() -> new Xx object")},
     {NULL,              NULL}           /* sentinel */
 };