--- /dev/null	2020-09-04 12:37:41.765504620 +0200
+++ new/src/hotspot/share/memory/metaspace/msArenaGrowthPolicy.cpp	2020-09-04 13:57:40.169282834 +0200
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020 SAP SE. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+
+#include "memory/metaspace/msArenaGrowthPolicy.hpp"
+#include "utilities/globalDefinitions.hpp"
+
+namespace metaspace {
+
+// hard-coded chunk allocation sequences for various space types
+//  (Note: when modifying this, don't add jumps of more than double the
+//   last chunk size. There is a gtest testing this, see test_arenagrowthpolicy.cpp)
+
+static const chunklevel_t g_sequ_standard_non_class[] = {
+    chunklevel::CHUNK_LEVEL_4K,
+    chunklevel::CHUNK_LEVEL_4K,
+    chunklevel::CHUNK_LEVEL_4K,
+    chunklevel::CHUNK_LEVEL_8K,
+    chunklevel::CHUNK_LEVEL_16K
+    // .. repeat last
+};
+
+static const chunklevel_t g_sequ_standard_class[] = {
+    chunklevel::CHUNK_LEVEL_2K,
+    chunklevel::CHUNK_LEVEL_2K,
+    chunklevel::CHUNK_LEVEL_4K,
+    chunklevel::CHUNK_LEVEL_8K,
+    chunklevel::CHUNK_LEVEL_16K
+    // .. repeat last
+};
+
+static const chunklevel_t g_sequ_anon_non_class[] = {
+   chunklevel::CHUNK_LEVEL_1K,
+   // .. repeat last
+};
+
+static const chunklevel_t g_sequ_anon_class[] = {
+    chunklevel::CHUNK_LEVEL_1K,
+    // .. repeat last
+};
+
+static const chunklevel_t g_sequ_refl_non_class[] = {
+    chunklevel::CHUNK_LEVEL_2K,
+    chunklevel::CHUNK_LEVEL_1K
+    // .. repeat last
+};
+
+static const chunklevel_t g_sequ_refl_class[] = {
+    chunklevel::CHUNK_LEVEL_1K,
+    // .. repeat last
+};
+
+// Boot class loader: give it large chunks: beyond commit granule size
+// (typically 64K) the costs for large chunks largely diminishes since
+// they are committed on the fly.
+static const chunklevel_t g_sequ_boot_non_class[] = {
+    chunklevel::CHUNK_LEVEL_4M,
+    chunklevel::CHUNK_LEVEL_1M
+    // .. repeat last
+};
+
+static const chunklevel_t g_sequ_boot_class[] = {
+    chunklevel::CHUNK_LEVEL_256K
+    // .. repeat last
+};
+
+const ArenaGrowthPolicy* ArenaGrowthPolicy::policy_for_space_type(Metaspace::MetaspaceType space_type, bool is_class) {
+
+#define DEFINE_CLASS_FOR_ARRAY(what) \
+  static ArenaGrowthPolicy chunk_alloc_sequence_##what (g_sequ_##what, sizeof(g_sequ_##what)/sizeof(chunklevel_t));
+
+  DEFINE_CLASS_FOR_ARRAY(standard_non_class)
+  DEFINE_CLASS_FOR_ARRAY(standard_class)
+  DEFINE_CLASS_FOR_ARRAY(anon_non_class)
+  DEFINE_CLASS_FOR_ARRAY(anon_class)
+  DEFINE_CLASS_FOR_ARRAY(refl_non_class)
+  DEFINE_CLASS_FOR_ARRAY(refl_class)
+  DEFINE_CLASS_FOR_ARRAY(boot_non_class)
+  DEFINE_CLASS_FOR_ARRAY(boot_class)
+
+  if (is_class) {
+    switch(space_type) {
+    case Metaspace::StandardMetaspaceType:          return &chunk_alloc_sequence_standard_class;
+    case Metaspace::ReflectionMetaspaceType:        return &chunk_alloc_sequence_refl_class;
+    case Metaspace::ClassMirrorHolderMetaspaceType: return &chunk_alloc_sequence_anon_class;
+    case Metaspace::BootMetaspaceType:              return &chunk_alloc_sequence_boot_class;
+    default: ShouldNotReachHere();
+    }
+  } else {
+    switch(space_type) {
+    case Metaspace::StandardMetaspaceType:          return &chunk_alloc_sequence_standard_non_class;
+    case Metaspace::ReflectionMetaspaceType:        return &chunk_alloc_sequence_refl_non_class;
+    case Metaspace::ClassMirrorHolderMetaspaceType: return &chunk_alloc_sequence_anon_non_class;
+    case Metaspace::BootMetaspaceType:              return &chunk_alloc_sequence_boot_non_class;
+    default: ShouldNotReachHere();
+    }
+  }
+
+  return NULL;
+
+}
+
+} // namespace
+