Version 3.14.5
Killed off the SCons based build.
Added a faster API for creating v8::Integer objects.
Speeded up function deoptimization by avoiding quadratic pass over optimized function list. (Chromium issue 155270)
Always invoke the default Array.sort functions from builtin functions. (issue 2372)
Reverted recent CPU profiler changes because they broke --prof. (issue 2364)
Switched code flushing to use different JSFunction field. (issue 1609)
Performance and stability improvements on all platforms.
git-svn-id: http://v8.googlecode.com/svn/trunk@12787 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
diff --git a/src/heap.cc b/src/heap.cc
index 5de06aa..e3fcb93 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -2102,6 +2102,7 @@
map->set_code_cache(empty_fixed_array(), SKIP_WRITE_BARRIER);
map->init_back_pointer(undefined_value());
map->set_unused_property_fields(0);
+ map->set_instance_descriptors(empty_descriptor_array());
map->set_bit_field(0);
map->set_bit_field2(1 << Map::kIsExtensible);
int bit_field3 = Map::EnumLengthBits::encode(Map::kInvalidEnumCache) |
@@ -2109,12 +2110,6 @@
map->set_bit_field3(bit_field3);
map->set_elements_kind(elements_kind);
- // If the map object is aligned fill the padding area with Smi 0 objects.
- if (Map::kPadStart < Map::kSize) {
- memset(reinterpret_cast<byte*>(map) + Map::kPadStart - kHeapObjectTag,
- 0,
- Map::kSize - Map::kPadStart);
- }
return map;
}
@@ -2241,12 +2236,15 @@
// Fix the instance_descriptors for the existing maps.
meta_map()->set_code_cache(empty_fixed_array());
meta_map()->init_back_pointer(undefined_value());
+ meta_map()->set_instance_descriptors(empty_descriptor_array());
fixed_array_map()->set_code_cache(empty_fixed_array());
fixed_array_map()->init_back_pointer(undefined_value());
+ fixed_array_map()->set_instance_descriptors(empty_descriptor_array());
oddball_map()->set_code_cache(empty_fixed_array());
oddball_map()->init_back_pointer(undefined_value());
+ oddball_map()->set_instance_descriptors(empty_descriptor_array());
// Fix prototype object for existing maps.
meta_map()->set_prototype(null_value());
@@ -2715,7 +2713,7 @@
// hash code in place. The hash code for the hidden_symbol is zero to ensure
// that it will always be at the first entry in property descriptors.
{ MaybeObject* maybe_obj =
- AllocateSymbol(CStrVector(""), 0, String::kZeroHash);
+ AllocateSymbol(CStrVector(""), 0, String::kEmptyStringHash);
if (!maybe_obj->ToObject(&obj)) return false;
}
hidden_symbol_ = String::cast(obj);
@@ -3956,8 +3954,7 @@
if (HasDuplicates(descriptors)) {
fun->shared()->ForbidInlineConstructor();
} else {
- MaybeObject* maybe_failure = map->InitializeDescriptors(descriptors);
- if (maybe_failure->IsFailure()) return maybe_failure;
+ map->InitializeDescriptors(descriptors);
map->set_pre_allocated_property_fields(count);
map->set_unused_property_fields(in_object_properties - count);
}
@@ -4431,13 +4428,14 @@
MaybeObject* Heap::AllocateStringFromUtf8Slow(Vector<const char> string,
+ int non_ascii_start,
PretenureFlag pretenure) {
- // Count the number of characters in the UTF-8 string and check if
- // it is an ASCII string.
+ // Continue counting the number of characters in the UTF-8 string, starting
+ // from the first non-ascii character or word.
+ int chars = non_ascii_start;
Access<UnicodeCache::Utf8Decoder>
decoder(isolate_->unicode_cache()->utf8_decoder());
- decoder->Reset(string.start(), string.length());
- int chars = 0;
+ decoder->Reset(string.start() + non_ascii_start, string.length() - chars);
while (decoder->has_more()) {
uint32_t r = decoder->GetNext();
if (r <= unibrow::Utf16::kMaxNonSurrogateCharCode) {