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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/elements.h" | 5 #include "src/elements.h" |
6 | 6 |
7 #include "src/arguments.h" | 7 #include "src/arguments.h" |
8 #include "src/conversions.h" | 8 #include "src/conversions.h" |
9 #include "src/factory.h" | 9 #include "src/factory.h" |
10 #include "src/messages.h" | 10 #include "src/messages.h" |
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1228 for (i = entry + 1; i < length; i++) { | 1228 for (i = entry + 1; i < length; i++) { |
1229 if (!backing_store->is_the_hole(i)) break; | 1229 if (!backing_store->is_the_hole(i)) break; |
1230 } | 1230 } |
1231 if (i == length) { | 1231 if (i == length) { |
1232 DeleteAtEnd(obj, backing_store, entry); | 1232 DeleteAtEnd(obj, backing_store, entry); |
1233 return; | 1233 return; |
1234 } | 1234 } |
1235 } | 1235 } |
1236 int num_used = 0; | 1236 int num_used = 0; |
1237 for (int i = 0; i < backing_store->length(); ++i) { | 1237 for (int i = 0; i < backing_store->length(); ++i) { |
1238 if (!backing_store->is_the_hole(i)) ++num_used; | 1238 if (!backing_store->is_the_hole(i)) { |
1239 // Bail out early if more than 1/4 is used. | 1239 ++num_used; |
1240 if (4 * num_used > backing_store->length()) break; | 1240 // Bail out if a number dictionary wouldn't be able to save at least |
| 1241 // 75% space. |
| 1242 if (4 * SeededNumberDictionary::ComputeCapacity(num_used) * |
| 1243 SeededNumberDictionary::kEntrySize > |
| 1244 backing_store->length()) { |
| 1245 return; |
| 1246 } |
| 1247 } |
1241 } | 1248 } |
1242 if (4 * num_used <= backing_store->length()) { | 1249 JSObject::NormalizeElements(obj); |
1243 JSObject::NormalizeElements(obj); | |
1244 } | |
1245 } | 1250 } |
1246 } | 1251 } |
1247 | 1252 |
1248 static void ReconfigureImpl(Handle<JSObject> object, | 1253 static void ReconfigureImpl(Handle<JSObject> object, |
1249 Handle<FixedArrayBase> store, uint32_t entry, | 1254 Handle<FixedArrayBase> store, uint32_t entry, |
1250 Handle<Object> value, | 1255 Handle<Object> value, |
1251 PropertyAttributes attributes) { | 1256 PropertyAttributes attributes) { |
1252 Handle<SeededNumberDictionary> dictionary = | 1257 Handle<SeededNumberDictionary> dictionary = |
1253 JSObject::NormalizeElements(object); | 1258 JSObject::NormalizeElements(object); |
1254 entry = dictionary->FindEntry(entry); | 1259 entry = dictionary->FindEntry(entry); |
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2382 } | 2387 } |
2383 } | 2388 } |
2384 | 2389 |
2385 DCHECK(j == result_len); | 2390 DCHECK(j == result_len); |
2386 return result_array; | 2391 return result_array; |
2387 } | 2392 } |
2388 | 2393 |
2389 ElementsAccessor** ElementsAccessor::elements_accessors_ = NULL; | 2394 ElementsAccessor** ElementsAccessor::elements_accessors_ = NULL; |
2390 } // namespace internal | 2395 } // namespace internal |
2391 } // namespace v8 | 2396 } // namespace v8 |
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