chore: add trace

Signed-off-by: Bo-Yi Wu <[email protected]>

trace/trace.go

@@ -0,0 +1,13 @@
+package trace
+
+import (
+	"log"
+	"time"
+)
+
+func ExecuteTime(title string, fn func()) {
+	start := time.Now()
+	fn()
+	elapsed := time.Since(start)
+	log.Printf("[%s] %s", elapsed, title)
+}

trace/trace_test.go

@@ -0,0 +1,21 @@
+package trace
+
+import (
+	"time"
+)
+
+func ExampleExecuteTime() {
+	ExecuteTime("step 1.", func() {
+		time.Sleep(200 * time.Millisecond)
+	})
+
+	ExecuteTime("step 2.", func() {
+		time.Sleep(300 * time.Millisecond)
+	})
+
+	ExecuteTime("step 3.", func() {
+		time.Sleep(400 * time.Millisecond)
+	})
+
+	// Output:
+}