diff --git a/src/hotspot/share/jfr/utilities/jfrDoublyLinkedList.hpp b/src/hotspot/share/jfr/utilities/jfrDoublyLinkedList.hpp
index eb92de630ef..a0048b1d26e 100644
--- a/src/hotspot/share/jfr/utilities/jfrDoublyLinkedList.hpp
+++ b/src/hotspot/share/jfr/utilities/jfrDoublyLinkedList.hpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2020, Oracle and/or its affiliates. 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
@@ -135,7 +135,6 @@ T* JfrDoublyLinkedList<T>::remove(T* const node) {
     prev->set_next(next);
   }
   --_count;
-  assert(_count >= 0, "invariant");
   assert(!in_list(node), "still in list error");
   return node;
 }
diff --git a/src/hotspot/share/jfr/utilities/jfrHashtable.hpp b/src/hotspot/share/jfr/utilities/jfrHashtable.hpp
index 4953b69757a..0a18bdebbc6 100644
--- a/src/hotspot/share/jfr/utilities/jfrHashtable.hpp
+++ b/src/hotspot/share/jfr/utilities/jfrHashtable.hpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2020, Oracle and/or its affiliates. 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
@@ -83,7 +83,7 @@ class JfrBasicHashtable : public CHeapObj<mtTracing> {
 
   size_t hash_to_index(uintptr_t full_hash) const {
     const uintptr_t h = full_hash % _table_size;
-    assert(h >= 0 && h < _table_size, "Illegal hash value");
+    assert(h < _table_size, "Illegal hash value");
     return (size_t)h;
   }
   size_t entry_size() const { return _entry_size; }
diff --git a/src/hotspot/share/oops/symbol.cpp b/src/hotspot/share/oops/symbol.cpp
index bcd9771c494..3e6d301da62 100644
--- a/src/hotspot/share/oops/symbol.cpp
+++ b/src/hotspot/share/oops/symbol.cpp
@@ -51,9 +51,7 @@ Symbol::Symbol(const u1* name, int length, int refcount) {
   _hash_and_refcount =  pack_hash_and_refcount((short)os::random(), refcount);
   _length = length;
   _body[0] = 0;  // in case length == 0
-  for (int i = 0; i < length; i++) {
-    byte_at_put(i, name[i]);
-  }
+  memcpy(_body, name, length);
 }
 
 void* Symbol::operator new(size_t sz, int len) throw() {
diff --git a/src/hotspot/share/oops/symbol.hpp b/src/hotspot/share/oops/symbol.hpp
index 18bc0ae387f..51add5ad42a 100644
--- a/src/hotspot/share/oops/symbol.hpp
+++ b/src/hotspot/share/oops/symbol.hpp
@@ -125,11 +125,6 @@ class Symbol : public MetaspaceObj {
     return (int)heap_word_size(byte_size(length));
   }
 
-  void byte_at_put(int index, u1 value) {
-    assert(index >=0 && index < length(), "symbol index overflow");
-    _body[index] = value;
-  }
-
   Symbol(const u1* name, int length, int refcount);
   void* operator new(size_t size, int len) throw();
   void* operator new(size_t size, int len, Arena* arena) throw();