diff --git a/pmap_test.go b/pmap_test.go
index 868ca7a..735ca4d 100644
--- a/pmap_test.go
+++ b/pmap_test.go
@@ -35,6 +35,8 @@ func BenchmarkGet(b *testing.B) {
 	b.Run("size=100", func(b *testing.B) { benchmarkGet(b, 100) })
 	b.Run("size=1000", func(b *testing.B) { benchmarkGet(b, 1000) })
 	b.Run("size=10000", func(b *testing.B) { benchmarkGet(b, 10000) })
+	//b.Run("size=100000", func(b *testing.B) { benchmarkGet(b, 100000) })
+	//b.Run("size=1000000", func(b *testing.B) { benchmarkGet(b, 1000000) })
 }
 
 func BenchmarkGetAbsent(b *testing.B) {
@@ -69,7 +71,7 @@ func benchmarkGet(b *testing.B, numElems int) {
 func benchmarkGetAbsent(b *testing.B, numElems int) {
 	p := New(hash)
 	for i := range iter(numElems) {
-		p = p.Set(-i-1, i)
+		p = p.Set(i-numElems, i)
 	}
 	if p.Len() != numElems {
 		b.Fatalf("Len() = %v, want %v", p.Len(), numElems)
@@ -94,6 +96,8 @@ func BenchmarkHmapGet_baseline(b *testing.B) {
 	b.Run("size=100", func(b *testing.B) { benchmarkHmapGet(b, 100) })
 	b.Run("size=1000", func(b *testing.B) { benchmarkHmapGet(b, 1000) })
 	b.Run("size=10000", func(b *testing.B) { benchmarkHmapGet(b, 10000) })
+	b.Run("size=100000", func(b *testing.B) { benchmarkHmapGet(b, 100000) })
+	b.Run("size=1000000", func(b *testing.B) { benchmarkHmapGet(b, 1000000) })
 }
 
 func benchmarkHmapGet(b *testing.B, numElems int) {
@@ -117,3 +121,54 @@ func benchmarkHmapGet(b *testing.B, numElems int) {
 		}
 	}
 }
+
+func BenchmarkSet(b *testing.B) {
+	b.Run("size=10", func(b *testing.B) { benchmarkSet(b, 10) })
+	b.Run("size=100", func(b *testing.B) { benchmarkSet(b, 100) })
+	b.Run("size=1000", func(b *testing.B) { benchmarkSet(b, 1000) })
+	b.Run("size=10000", func(b *testing.B) { benchmarkSet(b, 10000) })
+	if !testing.Short() {
+		b.Run("size=100000", func(b *testing.B) { benchmarkSet(b, 100000) })
+	}
+}
+
+func benchmarkSet(b *testing.B, numElems int) {
+	p := New(hash)
+	for i := range iter(numElems) {
+		p = p.Set(i, i)
+	}
+	if p.Len() != numElems {
+		b.Fatalf("Len() = %v, want %v", p.Len(), numElems)
+	}
+	b.ResetTimer()
+	for i := range iter(b.N) {
+		k := i + numElems
+		_ = p.Set(k, k)
+	}
+}
+
+func BenchmarkHmapSet_baseline(b *testing.B) {
+	b.Run("size=10", func(b *testing.B) { benchmarkHmapSet(b, 10) })
+	b.Run("size=100", func(b *testing.B) { benchmarkHmapSet(b, 100) })
+	b.Run("size=1000", func(b *testing.B) { benchmarkHmapSet(b, 1000) })
+	b.Run("size=10000", func(b *testing.B) { benchmarkHmapSet(b, 10000) })
+	if !testing.Short() {
+		b.Run("size=100000", func(b *testing.B) { benchmarkHmapSet(b, 100000) })
+	}
+}
+
+func benchmarkHmapSet(b *testing.B, numElems int) {
+	h := make(map[int]int)
+	for i := range iter(numElems) {
+		h[i] = i
+	}
+	if len(h) != numElems {
+		b.Fatalf("Len() = %v, want %v", len(h), numElems)
+	}
+	b.ResetTimer()
+	for i := range iter(b.N) {
+		k := i + numElems
+		h[k] = k
+		delete(h, k)
+	}
+}