Tweaks to improve memory consumption by TopSites. The biggest culprit

chrome/browser/history/top_sites_database.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "app/sql/connection.h"
 #include "app/sql/transaction.h"
 #include "base/file_util.h"
 #include "base/string_util.h"
 #include "chrome/browser/diagnostics/sqlite_diagnostics.h"
 #include "chrome/browser/history/history_types.h"
@@ skipping 114 matching lines @@
 // static
 std::string TopSitesDatabase::GetRedirects(const MostVisitedURL& url) {
   std::vector<std::string> redirects;
   for (size_t i = 0; i < url.redirects.size(); i++)
     redirects.push_back(url.redirects[i].spec());
   return JoinString(redirects, ' ');
 }
 
 // static
 void TopSitesDatabase::SetRedirects(const std::string& redirects,
-                                        MostVisitedURL* url) {
+                                    MostVisitedURL* url) {
   std::vector<std::string> redirects_vector;
   SplitStringAlongWhitespace(redirects, &redirects_vector);
   for (size_t i = 0; i < redirects_vector.size(); i++)
     url->redirects.push_back(GURL(redirects_vector[i]));
 }
 
 void TopSitesDatabase::SetPageThumbnail(const MostVisitedURL& url,
                                             int new_rank,
                                             const Images& thumbnail) {
   sql::Transaction transaction(db_.get());
@@ skipping 213 matching lines @@
   delete_statement.Run();
 
   return transaction.Commit();
 }
 
 sql::Connection* TopSitesDatabase::CreateDB(const FilePath& db_name) {
   scoped_ptr<sql::Connection> db(new sql::Connection());
   // Settings copied from ThumbnailDatabase.
   db->set_error_delegate(GetErrorHandlerForThumbnailDb());
   db->set_page_size(4096);
-  db->set_cache_size(64);
+  db->set_cache_size(32);
 
   if (!db->Open(db_name)) {
     LOG(ERROR) << db->GetErrorMessage();
     return NULL;
   }
 
   return db.release();
 }
 
 }  // namespace history