add benchmark for genRandomId method

Author: agauniyal

benchmark/meson.build

@@ -0,0 +1,5 @@
+randIdGen_exe = executable('randIdGen', 'randomIdGen.cpp')
+benchmark('randIdGen, not optimized', randIdGen_exe)
+
+op_randIdGen_exe = executable('op_randIdGen', 'op_randomIdGen.cpp')
+benchmark('op_randIdGen, optimized', op_randIdGen_exe)

benchmark/op_randomIdGen.cpp

@@ -0,0 +1,33 @@
+#include <random>
+#include <string>
+#include <vector>
+
+
+void genAndFill(std::vector<std::string> &v)
+{
+	std::string ss;
+	ss.resize(8, ' ');
+
+	constexpr char alphanum[] = "0123456789"
+	                            "abcdefghijklmnopqrstuvwxyz"
+	                            "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+
+	static const auto seed = std::random_device()();
+	static std::mt19937 gen(seed);
+	std::uniform_int_distribution<> dis(0, 61);
+
+	for (int i = 0; i < 8; ++i) {
+		ss[i] = alphanum[dis(gen)];
+	}
+	v.push_back(ss);
+}
+
+int main()
+{
+	std::vector<std::string> v;
+	v.reserve(500000);
+
+	for (auto l = 0; l < 500000; ++l) {
+		genAndFill(v);
+	}
+}

benchmark/randomIdGen.cpp

@@ -0,0 +1,28 @@
+#include <random>
+#include <string>
+#include <vector>
+
+
+void genAndFill(std::vector<std::string> &v)
+{
+	const char alphanum[] = "0123456789"
+	                        "abcdefghijklmnopqrstuvwxyz"
+	                        "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+	char ss[8];
+	std::random_device rd;
+	std::mt19937 gen(rd());
+
+	for (int i = 0; i < 8; i++) {
+		std::uniform_int_distribution<> dis(0, 61);
+		ss[i] = alphanum[dis(gen)];
+	}
+	v.push_back(ss);
+}
+
+int main()
+{
+	std::vector<std::string> v;
+	for (auto l = 0; l < 500000; l++) {
+		genAndFill(v);
+	}
+}

build.sh

@@ -4,4 +4,4 @@ set -ex
 
 mkdir -p build
 cd build/
-(meson --default-library=static .. && ninja) || (ninja && ./test/testexe)
+(meson --default-library=static ..  --warnlevel=3 && ninja) || (ninja && ./test/testexe)

meson.build

@@ -31,6 +31,7 @@ endif
 subdir('src')
 subdir('app')
 subdir('test')
+subdir('benchmark')
 
 emulate_rasp = find_program('scripts/emulate_rasp.sh')
 run_target('emulate', command : emulate_rasp.path())