diff --git a/go/makefile b/go/makefile
index 926757de..6450e8b4 100644
--- a/go/makefile
+++ b/go/makefile
@@ -1,2 +1,16 @@
-run:
+dev:
 	go run squiggle.go
+
+build:
+	go build squiggle.go  
+
+build-complex: 
+	go build -ldflags="-s -w" squiggle.go  
+	# https://stackoverflow.com/questions/45003259/passing-an-optimization-flag-to-a-go-compiler
+
+run:
+	./squiggle
+
+time-linux: 
+	@echo "Running 100x and taking avg time: ./squiggle"
+	@t=$$(/usr/bin/time -f "%e" -p bash -c 'for i in {0..100}; do ./squiggle; done' 2>&1 >/dev/null | grep real | awk '{print $$2}' ); echo "scale=2; 1000 * $$t / 100" | bc | sed "s|^|Time using 16 threads: |" | sed 's|$$|ms|' && echo
diff --git a/go/notes.md b/go/notes.md
index fe7dc34f..9adf28ef 100644
--- a/go/notes.md
+++ b/go/notes.md
@@ -1,4 +1,5 @@
 - [x] Hello world program
 - [x] Look into randomness sources in go
   - rand/v2 api: <https://pkg.go.dev/math/rand/v2>
-- [ ] 
+- [ ] Test with a million samples of a simple lognormal, just to get a sense of speed
+- [ ] Add mixture distribution
diff --git a/go/squiggle b/go/squiggle
new file mode 100755
index 00000000..1c942b3f
Binary files /dev/null and b/go/squiggle differ
diff --git a/go/squiggle.go b/go/squiggle.go
index eb563a5e..e7990ba6 100644
--- a/go/squiggle.go
+++ b/go/squiggle.go
@@ -6,6 +6,8 @@ import rand "math/rand/v2"
 
 var r = rand.New(rand.NewPCG(1, 2))
 
+// https://pkg.go.dev/math/rand/v2
+
 func sample_unit_uniform() float64 {
 	return r.Float64()
 }
@@ -46,7 +48,13 @@ func sample_to(low float64, high float64) float64 {
 }
 
 func main() {
-	fmt.Println("Hello world!")
-	fmt.Printf("%v\n", r.Float64())
-	fmt.Printf("%v\n", r.NormFloat64())
+	var n_samples int = 1000000
+	// var array_samples [n_samples]float64
+	var avg float64 = 0
+	for i := 0; i < n_samples; i++ {
+		avg += sample_to(1, 10)
+	}
+	avg = avg / float64(n_samples)
+	fmt.Printf("%v\n", avg)
+
 }