Workaround for Typing Slowdown

history_quick_provider.cc

 // Copyright (c) 2011 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 "chrome/browser/autocomplete/history_quick_provider.h"
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/i18n/break_iterator.h"
@@ skipping 78 matching lines @@
   }
 }
 
 // HistoryQuickProvider matches are currently not deletable.
 // TODO(mrossetti): Determine when a match should be deletable.
 void HistoryQuickProvider::DeleteMatch(const AutocompleteMatch& match) {}
 
 void HistoryQuickProvider::DoAutocomplete() {
   // Get the matching URLs from the DB.
   string16 term_string = autocomplete_input_.text();
+  // TODO(mrossetti): Temporary workaround for http://crbug.com/88498.
+  // Just give up after 50 characters.
+  if (term_string.size() > 50)
+    return;
   term_string = UnescapeURLComponent(term_string,
       UnescapeRule::SPACES | UnescapeRule::URL_SPECIAL_CHARS);
   history::InMemoryURLIndex::String16Vector terms(
       InMemoryURLIndex::WordVectorFromString16(term_string, false));
   ScoredHistoryMatches matches = GetIndex()->HistoryItemsForTerms(terms);
   if (matches.empty())
     return;
 
   // Artificially reduce the score of high-scoring matches which should not be
   // inline autocompletd. Each such result gets the next available
@@ skipping 114 matching lines @@
     do {
       offset += matches[i].length;
       ++i;
     } while ((i < match_count) && (offset == matches[i].offset));
     if (offset < text_length)
       spans.push_back(ACMatchClassification(offset, url_style));
   }
 
   return spans;
 }