diff --git a/internal/sanitize/sanitize_bench_test.go b/internal/sanitize/sanitize_bench_test.go
new file mode 100644
index 00000000..baa742b1
--- /dev/null
+++ b/internal/sanitize/sanitize_bench_test.go
@@ -0,0 +1,62 @@
+// sanitize_benchmark_test.go
+package sanitize_test
+
+import (
+	"testing"
+	"time"
+
+	"github.com/jackc/pgx/v5/internal/sanitize"
+)
+
+var benchmarkSanitizeResult string
+
+const benchmarkQuery = "" +
+	`SELECT * 
+   FROM "water_containers" 
+   WHERE NOT "id" = $1			-- int64
+   AND "tags" NOT IN $2         -- nil
+   AND "volume" > $3            -- float64
+   AND "transportable" = $4     -- bool
+   AND position($5 IN "sign")   -- bytes
+   AND "label" LIKE $6          -- string
+   AND "created_at" > $7;       -- time.Time`
+
+var benchmarkArgs = []any{
+	int64(12345),
+	nil,
+	float64(500),
+	true,
+	[]byte("8BADF00D"),
+	"kombucha's han'dy awokowa",
+	time.Date(2015, 10, 1, 0, 0, 0, 0, time.UTC),
+}
+
+func BenchmarkSanitize(b *testing.B) {
+	query, err := sanitize.NewQuery(benchmarkQuery)
+	if err != nil {
+		b.Fatalf("failed to create query: %v", err)
+	}
+
+	b.ResetTimer()
+	b.ReportAllocs()
+
+	for i := 0; i < b.N; i++ {
+		benchmarkSanitizeResult, err = query.Sanitize(benchmarkArgs...)
+		if err != nil {
+			b.Fatalf("failed to sanitize query: %v", err)
+		}
+	}
+}
+
+var benchmarkNewSQLResult string
+
+func BenchmarkSanitizeSQL(b *testing.B) {
+	b.ReportAllocs()
+	var err error
+	for i := 0; i < b.N; i++ {
+		benchmarkNewSQLResult, err = sanitize.SanitizeSQL(benchmarkQuery, benchmarkArgs...)
+		if err != nil {
+			b.Fatalf("failed to sanitize SQL: %v", err)
+		}
+	}
+}