# Chapter 7 lab — reproduce every result in the chapter.
#
#   make iter      # iteration start is randomized
#   make retain    # delete/clear retain memory; dropping the map frees it
#   make bench     # clear vs delete, pre-size vs not, lookups
#   make asm       # prove clear and the canonical delete loop share mapclear
#   make golden    # capture reference outputs into ./golden
#
# Requires Go 1.25.

.PHONY: iter retain bench asm golden clean

iter:
	go test -run TestIterationOrder -v .

retain:
	go test -run TestMapRetention -v .

bench:
	go test -bench=. -benchmem -count=10 .

asm:
	@out="$$(go test -c -gcflags='-S' 2>&1)"; \
	printf '%s\n' "$$out" | grep -A30 'ClearMap STEXT' | grep -q 'runtime.mapclear'; \
	printf '%s\n' "$$out" | grep -A30 'DeleteLoop STEXT' | grep -q 'runtime.mapclear'; \
	echo 'ClearMap and DeleteLoop both call runtime.mapclear'

golden:
	@mkdir -p golden
	go version > golden/go-version.txt
	go test -run 'TestIterationOrder|TestMapRetention' -v . > golden/behavior.txt 2>&1
	go test -bench=. -benchmem -count=10 . | tee golden/bench.txt
	@echo "wrote golden/{behavior,bench,go-version}.txt"

clean:
	go clean
	rm -rf golden