feat: add benchmar Make target

Makefile

@@ -1,4 +1,9 @@
-.PHONY: build debug-c debug-vm test
+.PHONY: build debug-c debug-vm test bench
+
+BENCH_FILE ?= benchmarks/loop.fzs
+RUNS ?= 7
+WARMUP ?= 2
+MAX_ITER ?= 2000000
 
 build:
 	cmake -S . -B build -DCMAKE_BUILD_TYPE=Debug
@@ -17,3 +22,8 @@ debug-vm: build
 test: build
 	ctest --output-on-failure --test-dir build
 
+# Compile the benchmark once, then measure only VM process execution.
+bench: build-release
+	./build/fzc -o build/benchmark.fzb $(BENCH_FILE)
+	python3 scripts/benchmark.py --runs $(RUNS) --warmup $(WARMUP) \
+		--max-iter $(MAX_ITER) --vm ./build/fz --program build/benchmark.fzb