Add benchmark tool

benchmark/Makefile

@@ -0,0 +1,31 @@
+CXXFLAGS = -std=c++14 -O2 -I..
+
+THEAD_POOL_COUNT = 16
+BENCH_FLAGS = -c 8 -d 5s
+
+# cpp-httplib
+bench: server
+	@./server & export PID=$$!; bombardier $(BENCH_FLAGS) localhost:8080; kill $${PID}
+
+server : cpp-httplib/main.cpp ../httplib.h
+	g++ -o $@ $(CXXFLAGS) -DCPPHTTPLIB_THREAD_POOL_COUNT=$(THEAD_POOL_COUNT) cpp-httplib/main.cpp
+
+run : server
+	@./server
+
+# crow
+server-crow : crow/main.cpp
+	g++ -o $@ $(CXXFLAGS) crow/main.cpp
+
+bench-crow: server-crow
+	@./server-crow & export PID=$$!; bombardier $(BENCH_FLAGS) localhost:8080; kill $${PID}
+
+# flask
+bench-flask:
+	@FLASK_APP=flask/main.py flask run --port=8080 & export PID=$$!; bombardier $(BENCH_FLAGS) localhost:8080; kill $${PID}
+
+# misc
+bench-all: bench bench-crow bench-flask
+
+clean:
+	rm -rf server*