Reserve capacity for static strings HashMap.

third_party/WebKit/Source/core/dom/QualifiedName.cpp

 /*
  * Copyright (C) 2005, 2006, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 23 matching lines @@
 
 namespace blink {
 
 struct SameSizeAsQualifiedNameImpl : public RefCounted<SameSizeAsQualifiedNameImpl> {
     unsigned bitfield;
     void* pointers[4];
 };
 
 static_assert(sizeof(QualifiedName::QualifiedNameImpl) == sizeof(SameSizeAsQualifiedNameImpl), "QualifiedNameImpl should stay small");
 
-static const int staticQualifiedNamesCount = HTMLNames::HTMLTagsCount + HTMLNames::HTMLAttrsCount
-    + MathMLNames::MathMLTagsCount + MathMLNames::MathMLAttrsCount
-    + SVGNames::SVGTagsCount + SVGNames::SVGAttrsCount
-    + XLinkNames::XLinkAttrsCount
-    + XMLNSNames::XMLNSAttrsCount
-    + XMLNames::XMLAttrsCount;
-
-struct QualifiedNameHashTraits : public HashTraits<QualifiedName::QualifiedNameImpl*> {
-    static const unsigned minimumTableSize = WTF::HashTableCapacityForSize<staticQualifiedNamesCount>::value;
-};
-
-typedef HashSet<QualifiedName::QualifiedNameImpl*, QualifiedNameHash, QualifiedNameHashTraits> QualifiedNameCache;
+using QualifiedNameCache = HashSet<QualifiedName::QualifiedNameImpl*, QualifiedNameHash>;
 
 static QualifiedNameCache& qualifiedNameCache()
 {
     // This code is lockless and thus assumes it all runs on one thread!
     ASSERT(isMainThread());
     static QualifiedNameCache* gNameCache = new QualifiedNameCache;
     return *gNameCache;
 }
 
 struct QNameComponentsTranslator {
@@ skipping 42 matching lines @@
     String local = localName();
     if (hasPrefix())
         return prefix().string() + ":" + local;
     return local;
 }
 
 // Global init routines
 DEFINE_GLOBAL(QualifiedName, anyName, nullAtom, starAtom, starAtom)
 DEFINE_GLOBAL(QualifiedName, nullName, nullAtom, nullAtom, nullAtom)
 
-void QualifiedName::init()
+void QualifiedName::initAndReserveCapacityForSize(unsigned size)
 {
     ASSERT(starAtom.impl());
+    qualifiedNameCache().reserveCapacityForSize(size + 2 /*starAtom and nullAtom */);
     new ((void*)&anyName) QualifiedName(nullAtom, starAtom, starAtom, true );
     new ((void*)&nullName) QualifiedName(nullAtom, nullAtom, nullAtom, true );
 }
 
 const QualifiedName& QualifiedName::null()
 {
     return nullName;
 }
 
 const AtomicString& QualifiedName::localNameUpper() const
@@ skipping 13 matching lines @@
 {
     new (targetAddress) QualifiedName(nullAtom, AtomicString(name), nameNamespace, true);
 }
 
 void QualifiedName::createStatic(void* targetAddress, StringImpl* name)
 {
     new (targetAddress) QualifiedName(nullAtom, AtomicString(name), nullAtom, true);
 }
 
 }