🚧 added size benchmark for binary formats

benchmarks/Makefile

@@ -17,5 +17,8 @@ json_benchmarks_simple: src/benchmarks_simple.cpp ../src/json.hpp
 number_jsons:
 	(test -e files/numbers/floats.json -a -e files/numbers/signed_ints.json -a -e files/numbers/unsigned_ints.json) || (cd files/numbers ; python generate.py)
 
+json_formats: src/formats.cpp ../src/json.hpp number_jsons
+	$(CXX) -std=c++11 $(CXXFLAGS) -DNDEBUG -O3 -flto -I../src $(<) $(LDFLAGS) -o $@
+
 clean:
-	rm -f json_benchmarks json_benchmarks_simple files/numbers/*.json
+	rm -f json_benchmarks json_benchmarks_simple json_formats files/numbers/*.json 

benchmarks/src/formats.cpp

+#include <json.hpp>
+#include <fstream>
+#include <iostream>
+
+using json = nlohmann::json;
+
+int main()
+{
+    std::vector<std::string> files = {
+        "files/jeopardy/jeopardy.json",
+        "files/nativejson-benchmark/canada.json",
+        "files/nativejson-benchmark/citm_catalog.json",
+        "files/nativejson-benchmark/twitter.json",
+        "files/numbers/floats.json",
+        "files/numbers/signed_ints.json",
+        "files/numbers/unsigned_ints.json"
+    };
+
+    for (const auto& file: files)
+    {
+        std::ifstream f(file);
+        json j = json::parse(f);
+        auto v_cbor = json::to_cbor(j);
+        auto v_msgpack = json::to_msgpack(j);
+        auto v_ubjson = json::to_ubjson(j, true, true);
+
+        double baseline = j.dump().size();
+
+        std::cout << file << ", JSON:               " << j.dump(2).size() << " " << j.dump(2).size()/baseline << std::endl;
+        std::cout << file << ", JSON (minified):    " << j.dump().size() << std::endl;
+        std::cout << file << ", CBOR:               " << v_cbor.size() << " " << v_cbor.size()/baseline << std::endl;
+        std::cout << file << ", MessagePack:        " << v_msgpack.size() << " " << v_msgpack.size()/baseline << std::endl;
+        std::cout << file << ", UBJSON (optimized): " << v_ubjson.size() << " " << v_ubjson.size()/baseline << std::endl;
+    }
+}