diff --git a/benchmark/benchmark_slog_test.go b/benchmark/benchmark_slog_test.go
new file mode 100644
index 0000000..6f115fd
--- /dev/null
+++ b/benchmark/benchmark_slog_test.go
@@ -0,0 +1,142 @@
+//go:build go1.21
+// +build go1.21
+
+/*
+Copyright 2021 The logr Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package logr
+
+import (
+	"log/slog"
+	"os"
+	"testing"
+
+	"github.com/go-logr/logr"
+)
+
+//
+// slogSink wrapper of discard
+//
+
+func BenchmarkSlogSinkLogInfoOneArg(b *testing.B) {
+	var log logr.Logger = logr.FromSlogHandler(logr.ToSlogHandler(logr.Discard()))
+	doInfoOneArg(b, log)
+}
+
+func BenchmarkSlogSinkLogInfoSeveralArgs(b *testing.B) {
+	var log logr.Logger = logr.FromSlogHandler(logr.ToSlogHandler(logr.Discard()))
+	doInfoSeveralArgs(b, log)
+}
+
+func BenchmarkSlogSinkLogInfoWithValues(b *testing.B) {
+	var log logr.Logger = logr.FromSlogHandler(logr.ToSlogHandler(logr.Discard()))
+	doInfoWithValues(b, log)
+}
+
+func BenchmarkSlogSinkLogV0Info(b *testing.B) {
+	var log logr.Logger = logr.FromSlogHandler(logr.ToSlogHandler(logr.Discard()))
+	doV0Info(b, log)
+}
+
+func BenchmarkSlogSinkLogV9Info(b *testing.B) {
+	var log logr.Logger = logr.FromSlogHandler(logr.ToSlogHandler(logr.Discard()))
+	doV9Info(b, log)
+}
+
+func BenchmarkSlogSinkLogError(b *testing.B) {
+	var log logr.Logger = logr.FromSlogHandler(logr.ToSlogHandler(logr.Discard()))
+	doError(b, log)
+}
+
+func BenchmarkSlogSinkWithValues(b *testing.B) {
+	var log logr.Logger = logr.FromSlogHandler(logr.ToSlogHandler(logr.Discard()))
+	doWithValues(b, log)
+}
+
+func BenchmarkSlogSinkWithName(b *testing.B) {
+	var log logr.Logger = logr.FromSlogHandler(logr.ToSlogHandler(logr.Discard()))
+	doWithName(b, log)
+}
+
+//
+// slogSink wrapper of slog's JSONHandler, for comparison
+//
+
+func makeSlogJSONLogger() logr.Logger {
+	devnull, _ := os.Open("/dev/null")
+	handler := slog.NewJSONHandler(devnull, nil)
+	return logr.FromSlogHandler(handler)
+}
+
+func BenchmarkSlogJSONLogInfoOneArg(b *testing.B) {
+	var log logr.Logger = makeSlogJSONLogger()
+	doInfoOneArg(b, log)
+}
+
+func BenchmarkSlogJSONLogInfoSeveralArgs(b *testing.B) {
+	var log logr.Logger = makeSlogJSONLogger()
+	doInfoSeveralArgs(b, log)
+}
+
+func BenchmarkSlogJSONLogInfoWithValues(b *testing.B) {
+	var log logr.Logger = makeSlogJSONLogger()
+	doInfoWithValues(b, log)
+}
+
+func BenchmarkSlogJSONLogV0Info(b *testing.B) {
+	var log logr.Logger = makeSlogJSONLogger()
+	doV0Info(b, log)
+}
+
+func BenchmarkSlogJSONLogV9Info(b *testing.B) {
+	var log logr.Logger = makeSlogJSONLogger()
+	doV9Info(b, log)
+}
+
+func BenchmarkSlogJSONLogError(b *testing.B) {
+	var log logr.Logger = makeSlogJSONLogger()
+	doError(b, log)
+}
+
+func BenchmarkSlogJSONLogWithValues(b *testing.B) {
+	var log logr.Logger = makeSlogJSONLogger()
+	doWithValues(b, log)
+}
+
+func BenchmarkSlogJSONWithName(b *testing.B) {
+	var log logr.Logger = makeSlogJSONLogger()
+	doWithName(b, log)
+}
+
+func BenchmarkSlogJSONWithCallDepth(b *testing.B) {
+	var log logr.Logger = makeSlogJSONLogger()
+	doWithCallDepth(b, log)
+}
+
+func BenchmarkSlogJSONLogInfoStringerValue(b *testing.B) {
+	var log logr.Logger = makeSlogJSONLogger()
+	doStringerValue(b, log)
+}
+
+func BenchmarkSlogJSONLogInfoErrorValue(b *testing.B) {
+	var log logr.Logger = makeSlogJSONLogger()
+	doErrorValue(b, log)
+}
+
+func BenchmarkSlogJSONLogInfoMarshalerValue(b *testing.B) {
+	var log logr.Logger = makeSlogJSONLogger()
+	doMarshalerValue(b, log)
+}
diff --git a/benchmark/benchmark_test.go b/benchmark/benchmark_test.go
index 090e3ce..35c7dd0 100644
--- a/benchmark/benchmark_test.go
+++ b/benchmark/benchmark_test.go
@@ -141,6 +141,10 @@ func doMarshalerValue(b *testing.B, log logr.Logger) {
 	}
 }
 
+//
+// discard
+//
+
 func BenchmarkDiscardLogInfoOneArg(b *testing.B) {
 	var log logr.Logger = logr.Discard()
 	doInfoOneArg(b, log)
@@ -181,6 +185,10 @@ func BenchmarkDiscardWithName(b *testing.B) {
 	doWithName(b, log)
 }
 
+//
+// funcr
+//
+
 func noopKV(_, _ string) {}
 func noopJSON(_ string)  {}