add picobench (#2915)

* add picobench

* Update xmake.lua

---------

Co-authored-by: Your Name <[email protected]>

packages/p/picobench/xmake.lua

@@ -0,0 +1,29 @@
+package("picobench")
+    set_kind("library", {headeronly = true})
+    set_homepage("https://github.com/iboB/picobench")
+    set_description("A micro microbenchmarking library for C++11 in a single header file")
+    set_license("MIT")
+
+    add_urls("https://github.com/iboB/picobench/archive/refs/tags/v$(version).tar.gz")
+    add_versions("2.06", "2f5d9b53260322b422a1834bbbe4947109039ee518353a8cc8dd57bbd1999b57")
+
+    on_install(function (package)
+        os.cp("include", package:installdir())
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            #include <vector>
+            #include <cstdlib>
+            #include "picobench/picobench.hpp"
+            static void rand_vector(picobench::state& s)
+            {
+                std::vector<int> v;
+                for (auto _ : s)
+                {
+                    v.push_back(rand());
+                }
+            }
+            PICOBENCH(rand_vector); // Register the above function with picobench
+        ]]}))
+    end)