Hardcopy of pybind11 instead of using git submodules (#552)

* removed pybind as submodule
* added hardcopy of pybind11 2.10.0
* rename pybind11 folder to avoid conflicts when changing branch

Co-authored-by: Dhanya Thattil <dhanya.thattil@psi.ch>

libs/pybind/docs/benchmark.py

@@ -0,0 +1,87 @@
+import datetime as dt
+import os
+import random
+
+nfns = 4  # Functions per class
+nargs = 4  # Arguments per function
+
+
+def generate_dummy_code_pybind11(nclasses=10):
+    decl = ""
+    bindings = ""
+
+    for cl in range(nclasses):
+        decl += f"class cl{cl:03};\n"
+    decl += "\n"
+
+    for cl in range(nclasses):
+        decl += f"class {cl:03} {{\n"
+        decl += "public:\n"
+        bindings += f'    py::class_<cl{cl:03}>(m, "cl{cl:03}")\n'
+        for fn in range(nfns):
+            ret = random.randint(0, nclasses - 1)
+            params = [random.randint(0, nclasses - 1) for i in range(nargs)]
+            decl += f"    cl{ret:03} *fn_{fn:03}("
+            decl += ", ".join(f"cl{p:03} *" for p in params)
+            decl += ");\n"
+            bindings += f'        .def("fn_{fn:03}", &cl{cl:03}::fn_{fn:03})\n'
+        decl += "};\n\n"
+        bindings += "        ;\n"
+
+    result = "#include <pybind11/pybind11.h>\n\n"
+    result += "namespace py = pybind11;\n\n"
+    result += decl + "\n"
+    result += "PYBIND11_MODULE(example, m) {\n"
+    result += bindings
+    result += "}"
+    return result
+
+
+def generate_dummy_code_boost(nclasses=10):
+    decl = ""
+    bindings = ""
+
+    for cl in range(nclasses):
+        decl += f"class cl{cl:03};\n"
+    decl += "\n"
+
+    for cl in range(nclasses):
+        decl += "class cl%03i {\n" % cl
+        decl += "public:\n"
+        bindings += f'    py::class_<cl{cl:03}>("cl{cl:03}")\n'
+        for fn in range(nfns):
+            ret = random.randint(0, nclasses - 1)
+            params = [random.randint(0, nclasses - 1) for i in range(nargs)]
+            decl += f"    cl{ret:03} *fn_{fn:03}("
+            decl += ", ".join(f"cl{p:03} *" for p in params)
+            decl += ");\n"
+            bindings += f'        .def("fn_{fn:03}", &cl{cl:03}::fn_{fn:03}, py::return_value_policy<py::manage_new_object>())\n'
+        decl += "};\n\n"
+        bindings += "        ;\n"
+
+    result = "#include <boost/python.hpp>\n\n"
+    result += "namespace py = boost::python;\n\n"
+    result += decl + "\n"
+    result += "BOOST_PYTHON_MODULE(example) {\n"
+    result += bindings
+    result += "}"
+    return result
+
+
+for codegen in [generate_dummy_code_pybind11, generate_dummy_code_boost]:
+    print("{")
+    for i in range(0, 10):
+        nclasses = 2**i
+        with open("test.cpp", "w") as f:
+            f.write(codegen(nclasses))
+        n1 = dt.datetime.now()
+        os.system(
+            "g++ -Os -shared -rdynamic -undefined dynamic_lookup "
+            "-fvisibility=hidden -std=c++14 test.cpp -I include "
+            "-I /System/Library/Frameworks/Python.framework/Headers -o test.so"
+        )
+        n2 = dt.datetime.now()
+        elapsed = (n2 - n1).total_seconds()
+        size = os.stat("test.so").st_size
+        print("   {%i, %f, %i}," % (nclasses * nfns, elapsed, size))
+    print("}")