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diff --git a/src/third_party/wiredtiger/test/cppsuite/test_harness/util/perf_plotter.h b/src/third_party/wiredtiger/test/cppsuite/test_harness/util/perf_plotter.h
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+/*-
+ * Public Domain 2014-present MongoDB, Inc.
+ * Public Domain 2008-2014 WiredTiger, Inc.
+ *
+ * This is free and unencumbered software released into the public domain.
+ *
+ * Anyone is free to copy, modify, publish, use, compile, sell, or
+ * distribute this software, either in source code form or as a compiled
+ * binary, for any purpose, commercial or non-commercial, and by any
+ * means.
+ *
+ * In jurisdictions that recognize copyright laws, the author or authors
+ * of this software dedicate any and all copyright interest in the
+ * software to the public domain. We make this dedication for the benefit
+ * of the public at large and to the detriment of our heirs and
+ * successors. We intend this dedication to be an overt act of
+ * relinquishment in perpetuity of all present and future rights to this
+ * software under copyright law.
+ *
+ * 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 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.
+ */
+#ifndef PERF_PLOTTER_H
+#define PERF_PLOTTER_H
+#include <fstream>
+#include <mutex>
+#include <vector>
+namespace test_harness {
+/*
+ * Singleton class owning the perf plot json, provides access to add statistics, and a central call
+ * point to output the file.
+ */
+class perf_plotter {
+    public:
+    static perf_plotter &instance();
+
+    public:
+    /* No copies of the singleton allowed. */
+    perf_plotter(perf_plotter const &) = delete;
+    perf_plotter &operator=(perf_plotter const &) = delete;
+
+    /* Anyone can get the perf_plotter and add a statistic to it. */
+    void add_stat(const std::string &stat_string);
+    void output_perf_file(const std::string &test_name);
+
+    private:
+    perf_plotter();
+    std::vector<std::string> _stats;
+    std::mutex _stat_mutex;
+};
+} // namespace test_harness
+
+#endif