logtail: reduce PublicID.UnmarshalText from 2 allocs to 0

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2021-04-15 10:42:02 -07:00
parent bb0710d51d
commit b34fbb24e8
2 changed files with 32 additions and 6 deletions
@@ -303,3 +303,26 @@ func TestParseAndRemoveLogLevel(t *testing.T) {
 		}
 	}
 }
+
+func TestPublicIDUnmarshalText(t *testing.T) {
+	const hexStr = "6c60a9e0e7af57170bb1347b2d477e4cbc27d4571a4923b21651456f931e3d55"
+	x := []byte(hexStr)
+
+	var id PublicID
+	if err := id.UnmarshalText(x); err != nil {
+		t.Fatal(err)
+	}
+	if id.String() != hexStr {
+		t.Errorf("String = %q; want %q", id.String(), hexStr)
+	}
+
+	n := int(testing.AllocsPerRun(1000, func() {
+		var id PublicID
+		if err := id.UnmarshalText(x); err != nil {
+			t.Fatal(err)
+		}
+	}))
+	if n != 0 {
+		t.Errorf("allocs = %v; want 0", n)
+	}
+}