diff --git a/lib_test.go b/lib_test.go
index 8b916b1..093b5b5 100644
--- a/lib_test.go
+++ b/lib_test.go
@@ -248,7 +248,7 @@ func BenchmarkCompare(b *testing.B) {
 
 func BenchmarkThroughputP(b *testing.B) {
 	p := buffer.DefaultPool(0)
-	b.SetParallelism(runtime.GOMAXPROCS(-1))
+	b.SetParallelism(runtime.GOMAXPROCS(-1) * 64)
 	b.RunParallel(func(pb *testing.PB) {
 		dst := bytes.NewBuffer(nil)
 		wo := writerOnly{dst}
@@ -263,7 +263,7 @@ func BenchmarkThroughputP(b *testing.B) {
 }
 
 func BenchmarkCompareP(b *testing.B) {
-	b.SetParallelism(runtime.GOMAXPROCS(-1))
+	b.SetParallelism(runtime.GOMAXPROCS(-1) * 64)
 	b.RunParallel(func(pb *testing.PB) {
 		dst := bytes.NewBuffer(nil)
 		wo := writerOnly{dst}