1 files changed, 43 insertions, 0 deletions
diff --git a/src/log/slog/attr_test.go b/src/log/slog/attr_test.go
new file mode 100644
index 0000000..1187a85
--- /dev/null
+++ b/src/log/slog/attr_test.go
@@ -0,0 +1,43 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package slog
+
+import (
+	"internal/testenv"
+	"testing"
+	"time"
+)
+
+func TestAttrNoAlloc(t *testing.T) {
+	testenv.SkipIfOptimizationOff(t)
+	// Assign values just to make sure the compiler doesn't optimize away the statements.
+	var (
+		i int64
+		u uint64
+		f float64
+		b bool
+		s string
+		x any
+		p = &i
+		d time.Duration
+	)
+	a := int(testing.AllocsPerRun(5, func() {
+		i = Int64("key", 1).Value.Int64()
+		u = Uint64("key", 1).Value.Uint64()
+		f = Float64("key", 1).Value.Float64()
+		b = Bool("key", true).Value.Bool()
+		s = String("key", "foo").Value.String()
+		d = Duration("key", d).Value.Duration()
+		x = Any("key", p).Value.Any()
+	}))
+	if a != 0 {
+		t.Errorf("got %d allocs, want zero", a)
+	}
+	_ = u
+	_ = f
+	_ = b
+	_ = s
+	_ = x
+}