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Performance issue in NodeJS >= 10.0.0 #27667

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hellivan opened this issue May 13, 2019 · 7 comments
Closed

Performance issue in NodeJS >= 10.0.0 #27667

hellivan opened this issue May 13, 2019 · 7 comments
Labels
confirmed-bug Issues with confirmed bugs. performance Issues and PRs related to the performance of Node.js. v8 engine Issues and PRs related to the V8 dependency.

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@hellivan
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Not sure if this is the right place but I may have found a possible performance issue in NodeJS JavaScript execution.
While execution of this example script on a NodeJS runtime <10.0.0 runs smoothly, it freezes on NodeJS runtimes >= 10.0.0 for an indefinite amount of time.
I tested the script for all latest major releases of NodeJS and got the following results:

  • 8.16.0: Runs smoothly
  • 9.11.2: Runs smoothly
  • 10.0.0: Freeze
  • 10.15.3: Freeze
  • 11.15.0: Freeze
  • 12.2.0: Freeze

I tested the script on different machines (including windows hosts), always getting the same result.
Due to the facts that the example-script is a pure JavaScript file with no dependencies on any NodeJS or external modules, and that the issue occurred first in NodeJS version 10.0.0 I assume that it has to do something with the upgrade of V8 Runtime from 6.2 to 6.6, which was listed in the changelog ov NodeJS version 10.0.0.

NB: I discovered this issue after upgrading a service to newest NodeJS runtime. The service is responsible for validating arbitrary Data against a defined JSONSchema. Validation is implemented using an external library called AJV. After the update, the service started to freeze sporadically during validation process. The provided example script therefore contains an example of a validation function generated by AJV library and some sample data (array of 1000 elements) for which validation will freeze after some time (on my machine, depending on NodeJs version at element no ~594 or no ~610).

@ZYSzys ZYSzys added the performance Issues and PRs related to the performance of Node.js. label May 13, 2019
@Fishrock123 Fishrock123 added the v8 engine Issues and PRs related to the V8 dependency. label May 13, 2019
@bricss
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bricss commented May 13, 2019

Looks like, it's an issue with Ajv performance in general right now -> ajv-validator/ajv#995

@bnoordhuis
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bnoordhuis commented May 13, 2019

Can you run rm *.log && node --prof script.js && node --prof-process *.log with node 8 and 10 and post the outputs? Thanks.

(The reason I ask you to do it is that it might be something local to your machine. That should hopefully show up in the profile log.)

edit: if it freezes, you might want to ^C it after a few seconds. That should still result in a usable log file.

@hellivan
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hellivan commented May 14, 2019

Can you run rm *.log && node --prof script.js && node --prof-process *.log with node 8 and 10 and post the outputs? Thanks.

(The reason I ask you to do it is that it might be something local to your machine. That should hopefully show up in the profile log.)

edit: if it freezes, you might want to ^C it after a few seconds. That should still result in a usable log file.

NodeJS version 8.16.0:

Processing entities...
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done
Statistical profiling result from isolate-0x3780740-v8.log, (112 ticks, 5 unaccounted, 0 excluded).

 [Shared libraries]:
   ticks  total  nonlib   name
      2    1.8%          [vdso]
      1    0.9%          /usr/lib/libc-2.29.so

 [JavaScript]:
   ticks  total  nonlib   name
      4    3.6%    3.7%  LazyCompile: ~validateFunction /home/ivan/Downloads/inode27667/nodeJsPerformanceIssue.js:14:26
      2    1.8%    1.8%  Stub: StringAddStub
      1    0.9%    0.9%  Stub: CEntryStub
      1    0.9%    0.9%  LazyCompile: ~validChunk _stream_writable.js:245:20
      1    0.9%    0.9%  LazyCompile: ~nextTick internal/process/next_tick.js:246:20
      1    0.9%    0.9%  LazyCompile: ~_tickCallback internal/process/next_tick.js:152:25
      1    0.9%    0.9%  LazyCompile: ~Writable.write _stream_writable.js:264:36
      1    0.9%    0.9%  LazyCompile: ~TickObject internal/process/next_tick.js:235:16
      1    0.9%    0.9%  LazyCompile: ~<anonymous> native typedarray.js:937:48
      1    0.9%    0.9%  Builtin: TypedArrayPrototypeLength
      1    0.9%    0.9%  Builtin: InterpreterEntryTrampoline
      1    0.9%    0.9%  Builtin: FastNewObject
      1    0.9%    0.9%  Builtin: CallFunction_ReceiverIsAny

 [C++]:
   ticks  total  nonlib   name
     32   28.6%   29.4%  node::(anonymous namespace)::ContextifyScript::New(v8::FunctionCallbackInfo<v8::Value> const&)
      3    2.7%    2.8%  void node::StreamBase::JSMethod<node::LibuvStreamWrap, &(int node::StreamBase::WriteString<(node::encoding)1>(v8::FunctionCallbackInfo<v8::Value> const&))>(v8::FunctionCallbackInfo<v8::Value> const&)
      3    2.7%    2.8%  v8::internal::Scavenger::ScavengeObject(v8::internal::HeapObject**, v8::internal::HeapObject*)
      2    1.8%    1.8%  v8::internal::AstValueFactory::GetOneByteStringInternal(v8::internal::Vector<unsigned char const>)
      2    1.8%    1.8%  v8::internal::AstNumberingVisitor::VisitNoStackOverflowCheck(v8::internal::AstNode*)
      2    1.8%    1.8%  v8::internal::(anonymous namespace)::JSObjectWalkVisitor<v8::internal::AllocationSiteUsageContext>::StructureWalk(v8::internal::Handle<v8::internal::JSObject>)
      2    1.8%    1.8%  prefix_array
      2    1.8%    1.8%  node::Binding(v8::FunctionCallbackInfo<v8::Value> const&)
      1    0.9%    0.9%  v8::internal::interpreter::BytecodeGenerator::VisitPropertyLoad(v8::internal::interpreter::Register, v8::internal::Property*)
      1    0.9%    0.9%  v8::internal::interpreter::BytecodeGenerator::VisitInSameTestExecutionScope(v8::internal::Expression*)
      1    0.9%    0.9%  v8::internal::interpreter::BytecodeArrayWriter::MaybeElideLastBytecode(v8::internal::interpreter::Bytecode, bool) [clone .part.61]
      1    0.9%    0.9%  v8::internal::interpreter::BytecodeArrayBuilder::ToBytecodeArray(v8::internal::Isolate*)
      1    0.9%    0.9%  v8::internal::compiler::InstructionSelector::VisitPhi(v8::internal::compiler::Node*)
      1    0.9%    0.9%  v8::internal::TransitionsAccessor::Insert(v8::internal::Handle<v8::internal::Name>, v8::internal::Handle<v8::internal::Map>, v8::internal::SimpleTransitionFlag)
      1    0.9%    0.9%  v8::internal::StoreBuffer::MoveEntriesToRememberedSet(int)
      1    0.9%    0.9%  v8::internal::Scope::FetchFreeVariables(v8::internal::DeclarationScope*, v8::internal::ParseInfo*, v8::internal::VariableProxy*)
      1    0.9%    0.9%  v8::internal::Scanner::Scan()
      1    0.9%    0.9%  v8::internal::ParserBase<v8::internal::Parser>::ParseFormalParameter(v8::internal::ParserFormalParameters*, bool*)
      1    0.9%    0.9%  v8::internal::Parser::ParseFunctionLiteral(v8::internal::AstRawString const*, v8::internal::Scanner::Location, v8::internal::FunctionNameValidity, v8::internal::FunctionKind, int, v8::internal::FunctionLiteral::FunctionType, v8::internal::LanguageMode, bool*)
      1    0.9%    0.9%  v8::internal::Parser::ParseFunction(v8::internal::AstRawString const*, int, v8::internal::FunctionKind, v8::internal::FunctionLiteral::FunctionType, v8::internal::DeclarationScope*, int*, int*, bool*, int*, bool*)
      1    0.9%    0.9%  v8::internal::PageScavengingItem::Process(v8::internal::Scavenger*)
      1    0.9%    0.9%  v8::internal::Map::UpdateFieldType(int, v8::internal::Handle<v8::internal::Name>, v8::internal::PropertyConstness, v8::internal::Representation, v8::internal::Handle<v8::internal::Object>)
      1    0.9%    0.9%  v8::internal::LoadIC::Load(v8::internal::Handle<v8::internal::Object>, v8::internal::Handle<v8::internal::Name>)
      1    0.9%    0.9%  v8::internal::JSObject::MigrateToMap(v8::internal::Handle<v8::internal::JSObject>, v8::internal::Handle<v8::internal::Map>, int)
      1    0.9%    0.9%  v8::internal::JSObject::FastPropertyAt(v8::internal::Handle<v8::internal::JSObject>, v8::internal::Representation, v8::internal::FieldIndex)
      1    0.9%    0.9%  v8::internal::IC::UpdateState(v8::internal::Handle<v8::internal::Object>, v8::internal::Handle<v8::internal::Object>)
      1    0.9%    0.9%  v8::internal::HeapObjectIterator::Next()
      1    0.9%    0.9%  v8::internal::Heap::AllocateRaw(int, v8::internal::AllocationSpace, v8::internal::AllocationAlignment)
      1    0.9%    0.9%  v8::internal::Heap::AllocateFixedArrayWithFiller(int, v8::internal::PretenureFlag, v8::internal::Object*)
      1    0.9%    0.9%  v8::internal::HashTable<v8::internal::StringTable, v8::internal::StringTableShape>::Rehash()
      1    0.9%    0.9%  v8::internal::GetICCounts(v8::internal::JSFunction*, int*, int*, int*, int*, int*)
      1    0.9%    0.9%  v8::internal::FieldIndex::ForDescriptor(v8::internal::Map const*, int)
      1    0.9%    0.9%  v8::internal::Deserializer::PostProcessNewObject(v8::internal::HeapObject*, int)
      1    0.9%    0.9%  v8::internal::DescriptorArray::GetDetails(int)
      1    0.9%    0.9%  v8::internal::Builtin_HandleApiCall(int, v8::internal::Object**, v8::internal::Isolate*)
      1    0.9%    0.9%  v8::internal::AstValueFactory::Internalize(v8::internal::Isolate*)
      1    0.9%    0.9%  v8::internal::Assembler::jmp(v8::internal::Handle<v8::internal::Code>, v8::internal::RelocInfo::Mode)
      1    0.9%    0.9%  v8::internal::(anonymous namespace)::ElementsAccessorBase<v8::internal::(anonymous namespace)::TypedElementsAccessor<(v8::internal::ElementsKind)15, unsigned int>, v8::internal::(anonymous namespace)::ElementsKindTraits<(v8::internal::ElementsKind)15> >::GetEntryForIndex(v8::internal::Isolate*, v8::internal::JSObject*, v8::internal::FixedArrayBase*, unsigned int)
      1    0.9%    0.9%  start_thread
      1    0.9%    0.9%  node::inspector::(anonymous namespace)::InspectorConsoleCall(v8::FunctionCallbackInfo<v8::Value> const&)
      1    0.9%    0.9%  node::TTYWrap::New(v8::FunctionCallbackInfo<v8::Value> const&)
      1    0.9%    0.9%  node::LibuvStreamWrap::Initialize(v8::Local<v8::Object>, v8::Local<v8::Value>, v8::Local<v8::Context>)::{lambda(v8::FunctionCallbackInfo<v8::Value> const&)#1}::_FUN(v8::FunctionCallbackInfo<v8::Value> const&)
      1    0.9%    0.9%  internal_fnmatch
      1    0.9%    0.9%  int v8::internal::BinarySearch<(v8::internal::SearchMode)1, v8::internal::DescriptorArray>(v8::internal::DescriptorArray*, v8::internal::Name*, int, int*)
      1    0.9%    0.9%  arena_get2.part.5
      1    0.9%    0.9%  __vfwscanf_internal
      1    0.9%    0.9%  __GI___pthread_mutex_trylock

 [Summary]:
   ticks  total  nonlib   name
     17   15.2%   15.6%  JavaScript
     87   77.7%   79.8%  C++
      7    6.3%    6.4%  GC
      3    2.7%          Shared libraries
      5    4.5%          Unaccounted

 [C++ entry points]:
   ticks    cpp   total   name
     41   55.4%   36.6%  v8::internal::Builtin_HandleApiCall(int, v8::internal::Object**, v8::internal::Isolate*)
     15   20.3%   13.4%  v8::internal::Runtime_CompileLazy(int, v8::internal::Object**, v8::internal::Isolate*)
      5    6.8%    4.5%  v8::internal::Runtime_CopyDataProperties(int, v8::internal::Object**, v8::internal::Isolate*)
      3    4.1%    2.7%  v8::internal::Runtime_StoreIC_Miss(int, v8::internal::Object**, v8::internal::Isolate*)
      3    4.1%    2.7%  v8::internal::Runtime_KeyedStoreIC_Miss(int, v8::internal::Object**, v8::internal::Isolate*)
      2    2.7%    1.8%  v8::internal::Runtime_CreateObjectLiteral(int, v8::internal::Object**, v8::internal::Isolate*)
      2    2.7%    1.8%  v8::internal::Builtin_DateNow(int, v8::internal::Object**, v8::internal::Isolate*)
      1    1.4%    0.9%  v8::internal::Runtime_SetProperty(int, v8::internal::Object**, v8::internal::Isolate*)
      1    1.4%    0.9%  v8::internal::Runtime_LoadIC_Miss(int, v8::internal::Object**, v8::internal::Isolate*)
      1    1.4%    0.9%  v8::internal::Runtime_Interrupt(int, v8::internal::Object**, v8::internal::Isolate*)

 [Bottom up (heavy) profile]:
  Note: percentage shows a share of a particular caller in the total
  amount of its parent calls.
  Callers occupying less than 1.0% are not shown.

   ticks parent  name
     32   28.6%  node::(anonymous namespace)::ContextifyScript::New(v8::FunctionCallbackInfo<v8::Value> const&)
     32  100.0%    v8::internal::Builtin_HandleApiCall(int, v8::internal::Object**, v8::internal::Isolate*)
     28   87.5%      LazyCompile: ~runInThisContext bootstrap_node.js:512:28
     28  100.0%        LazyCompile: ~NativeModule.compile bootstrap_node.js:601:44
     28  100.0%          LazyCompile: ~NativeModule.require bootstrap_node.js:533:34
      5   17.9%            Script: ~<anonymous> module.js:1:11
      3   10.7%            Script: ~<anonymous> util.js:1:11
      3   10.7%            Script: ~<anonymous> tty.js:1:11
      3   10.7%            Script: ~<anonymous> stream.js:1:11
      2    7.1%            Script: ~<anonymous> timers.js:1:11
      2    7.1%            LazyCompile: ~setupGlobalConsole bootstrap_node.js:323:30
      1    3.6%            Script: ~<anonymous> readline.js:1:11
      1    3.6%            Script: ~<anonymous> net.js:1:11
      1    3.6%            Script: ~<anonymous> internal/url.js:1:11
      1    3.6%            Script: ~<anonymous> internal/loader/ModuleRequest.js:1:11
      1    3.6%            Script: ~<anonymous> internal/loader/ModuleJob.js:1:11
      1    3.6%            Script: ~<anonymous> fs.js:1:11
      1    3.6%            LazyCompile: ~startup bootstrap_node.js:24:19
      1    3.6%            LazyCompile: ~setup_performance internal/process.js:15:27
      1    3.6%            LazyCompile: ~setupGlobalVariables bootstrap_node.js:268:32
      1    3.6%            LazyCompile: ~setupGlobalTimeouts bootstrap_node.js:313:31
      4   12.5%      LazyCompile: ~createScript vm.js:79:22
      4  100.0%        LazyCompile: ~runInThisContext vm.js:138:26
      4  100.0%          LazyCompile: ~Module._compile module.js:610:37
      4  100.0%            LazyCompile: ~Module._extensions..js module.js:662:37

      5    4.5%  UNKNOWN

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done
Statistical profiling result from isolate-0x2dde7b0-v8.log, (192657 ticks, 1 unaccounted, 0 excluded).

 [Shared libraries]:
   ticks  total  nonlib   name

 [JavaScript]:
   ticks  total  nonlib   name
     21    0.0%    0.0%  LazyCompile: ~validateFunction /home/ivan/Downloads/inode27667/nodeJsPerformanceIssue.js:14:26
      5    0.0%    0.0%  LazyCompile: ~nextTick internal/process/next_tick.js:206:20
      5    0.0%    0.0%  Builtin: CallFunction_ReceiverIsAny
      4    0.0%    0.0%  Builtin: InterpreterEntryTrampoline
      3    0.0%    0.0%  LazyCompile: ~entities.forEach /home/ivan/Downloads/inode27667/nodeJsPerformanceIssue.js:2785:18
      2    0.0%    0.0%  Stub: StringAddStub
      2    0.0%    0.0%  LazyCompile: ~validateAsyncId internal/async_hooks.js:117:25
      2    0.0%    0.0%  LazyCompile: ~onwrite _stream_writable.js:458:17
      2    0.0%    0.0%  LazyCompile: ~handleWriteReq internal/stream_base_commons.js:9:24
      2    0.0%    0.0%  LazyCompile: ~Writable.write _stream_writable.js:269:36
      2    0.0%    0.0%  LazyCompile: ~Readable.removeListener _stream_readable.js:832:45
      2    0.0%    0.0%  Builtin: Call_ReceiverIsAny
      1    0.0%    0.0%  Stub: ArraySingleArgumentConstructorStub
      1    0.0%    0.0%  Stub: ArrayConstructorStub
      1    0.0%    0.0%  LazyCompile: ~writeGeneric internal/stream_base_commons.js:67:22
      1    0.0%    0.0%  LazyCompile: ~write console.js:141:15
      1    0.0%    0.0%  LazyCompile: ~setup_performance internal/process.js:27:27
      1    0.0%    0.0%  LazyCompile: ~popAsyncIds internal/async_hooks.js:402:21
      1    0.0%    0.0%  LazyCompile: ~getColorDepth internal/tty.js:72:23
      1    0.0%    0.0%  LazyCompile: ~doWrite _stream_writable.js:403:17
      1    0.0%    0.0%  LazyCompile: ~addListener events.js:260:58
      1    0.0%    0.0%  LazyCompile: ~_tickCallback internal/process/next_tick.js:152:25
      1    0.0%    0.0%  LazyCompile: ~_addListener events.js:193:22
      1    0.0%    0.0%  LazyCompile: ~Socket._writeGeneric net.js:734:42
      1    0.0%    0.0%  LazyCompile: ~Socket net.js:227:16
      1    0.0%    0.0%  LazyCompile: *getColorDepth internal/tty.js:72:23
      1    0.0%    0.0%  Builtin: StoreIC
      1    0.0%    0.0%  Builtin: RegExpPrototypeTest
      1    0.0%    0.0%  Builtin: KeyedStoreIC
      1    0.0%    0.0%  Builtin: FastNewObject
      1    0.0%    0.0%  Builtin: FastFunctionPrototypeBind
      1    0.0%    0.0%  Builtin: Call_ReceiverIsNullOrUndefined
      1    0.0%    0.0%  Builtin: CallFunction_ReceiverIsNullOrUndefined
      1    0.0%    0.0%  Builtin: CallBoundFunction

 [C++]:
   ticks  total  nonlib   name
  120013   62.3%   62.3%  v8::internal::compiler::(anonymous namespace)::NeedsCheckHeapObject(v8::internal::compiler::Node*)
  46487   24.1%   24.1%  v8::internal::compiler::NodeProperties::GetControlInput(v8::internal::compiler::Node*, int)
  13024    6.8%    6.8%  v8::internal::compiler::OperatorProperties::HasContextInput(v8::internal::compiler::Operator const*)
  12811    6.6%    6.6%  v8::internal::compiler::OperatorProperties::HasFrameStateInput(v8::internal::compiler::Operator const*)
     71    0.0%    0.0%  __pthread_cond_wait
     40    0.0%    0.0%  node::contextify::ContextifyScript::New(v8::FunctionCallbackInfo<v8::Value> const&)
     14    0.0%    0.0%  void node::StreamBase::JSMethod<node::LibuvStreamWrap, &(int node::StreamBase::WriteString<(node::encoding)1>(v8::FunctionCallbackInfo<v8::Value> const&))>(v8::FunctionCallbackInfo<v8::Value> const&)
      6    0.0%    0.0%  v8::internal::compiler::GraphReducer::ReduceTop()
      6    0.0%    0.0%  node::GetBinding(v8::FunctionCallbackInfo<v8::Value> const&)
      5    0.0%    0.0%  v8::internal::compiler::GraphTrimmer::TrimGraph()
      5    0.0%    0.0%  __GI___libc_write
      4    0.0%    0.0%  v8::internal::(anonymous namespace)::JSObjectWalkVisitor<v8::internal::AllocationSiteUsageContext>::StructureWalk(v8::internal::Handle<v8::internal::JSObject>)
      4    0.0%    0.0%  node::EnvGetter(v8::Local<v8::Name>, v8::PropertyCallbackInfo<v8::Value> const&)
      3    0.0%    0.0%  v8::internal::compiler::Node::New(v8::internal::Zone*, unsigned int, v8::internal::compiler::Operator const*, int, v8::internal::compiler::Node* const*, bool)
      2    0.0%    0.0%  void v8::internal::LookupIterator::Start<false>()
      2    0.0%    0.0%  v8::internal::StackGuard::HandleInterrupts()
      2    0.0%    0.0%  v8::internal::Scope::FinalizeBlockScope()
      2    0.0%    0.0%  v8::internal::Heap::CopyJSObject(v8::internal::JSObject*, v8::internal::AllocationSite*)
      2    0.0%    0.0%  v8::internal::AstValueFactory::GetString(unsigned int, bool, v8::internal::Vector<unsigned char const>)
      1    0.0%    0.0%  void v8::internal::LookupIterator::NextInternal<false>(v8::internal::Map*, v8::internal::JSReceiver*)
      1    0.0%    0.0%  void v8::internal::CopyWords<v8::internal::Object*>(v8::internal::Object**, v8::internal::Object* const*, unsigned long)
      1    0.0%    0.0%  void node::Buffer::(anonymous namespace)::StringSlice<(node::encoding)1>(v8::FunctionCallbackInfo<v8::Value> const&)
      1    0.0%    0.0%  v8::internal::interpreter::BytecodeLabels::New()
      1    0.0%    0.0%  v8::internal::compiler::Type::SlowIs(v8::internal::compiler::Type*) [clone .part.28]
      1    0.0%    0.0%  v8::internal::compiler::SourcePositionTable::Decorator::Decorate(v8::internal::compiler::Node*)
      1    0.0%    0.0%  v8::internal::compiler::PropertyAccessBuilder::BuildCheckMaps(v8::internal::compiler::Node*, v8::internal::compiler::Node**, v8::internal::compiler::Node*, std::vector<v8::internal::Handle<v8::internal::Map>, std::allocator<v8::internal::Handle<v8::internal::Map> > > const&)
      1    0.0%    0.0%  v8::internal::compiler::Pipeline::GenerateCodeForCodeStub(v8::internal::Isolate*, v8::internal::compiler::CallDescriptor*, v8::internal::compiler::Graph*, v8::internal::compiler::Schedule*, v8::internal::Code::Kind, char const*, unsigned int, int, v8::internal::JumpOptimizationInfo*)
      1    0.0%    0.0%  v8::internal::compiler::MapsParameterInfo::MapsParameterInfo(v8::internal::ZoneHandleSet<v8::internal::Map> const&)
      1    0.0%    0.0%  v8::internal::compiler::LoopVariableOptimizer::Run()
      1    0.0%    0.0%  v8::internal::compiler::GraphReducer::ReplaceWithValue(v8::internal::compiler::Node*, v8::internal::compiler::Node*, v8::internal::compiler::Node*, v8::internal::compiler::Node*)
      1    0.0%    0.0%  v8::internal::compiler::GraphReducer::Reduce(v8::internal::compiler::Node*)
      1    0.0%    0.0%  v8::internal::compiler::DeadCodeElimination::ReduceNode(v8::internal::compiler::Node*)
      1    0.0%    0.0%  v8::internal::compiler::CommonOperatorReducer::ReduceMerge(v8::internal::compiler::Node*)
      1    0.0%    0.0%  v8::internal::compiler::CodeGenerator::ComputeBranchInfo(v8::internal::compiler::BranchInfo*, v8::internal::compiler::Instruction*)
      1    0.0%    0.0%  v8::internal::compiler::BytecodeLivenessMap::GetLiveness(int) const
      1    0.0%    0.0%  v8::internal::compiler::BytecodeGraphBuilder::MakeNode(v8::internal::compiler::Operator const*, int, v8::internal::compiler::Node* const*, bool)
      1    0.0%    0.0%  v8::internal::compiler::(anonymous namespace)::UpdateOutLiveness(v8::internal::interpreter::Bytecode, v8::internal::compiler::BytecodeLivenessState&, v8::internal::compiler::BytecodeLivenessState*, v8::internal::interpreter::BytecodeArrayAccessor const&, v8::internal::compiler::BytecodeLivenessMap const&)
      1    0.0%    0.0%  v8::internal::compiler::(anonymous namespace)::UpdateInLiveness(v8::internal::interpreter::Bytecode, v8::internal::compiler::BytecodeLivenessState&, v8::internal::interpreter::BytecodeArrayAccessor const&)
      1    0.0%    0.0%  v8::internal::Zone::New(unsigned long)
      1    0.0%    0.0%  v8::internal::StringTable::LookupKey(v8::internal::Isolate*, v8::internal::StringTableKey*)
      1    0.0%    0.0%  v8::internal::ScopeInfo::Create(v8::internal::Isolate*, v8::internal::Zone*, v8::internal::Scope*, v8::internal::MaybeHandle<v8::internal::ScopeInfo>)
      1    0.0%    0.0%  v8::internal::Scavenger::ScavengeObject(v8::internal::HeapObject**, v8::internal::HeapObject*)
      1    0.0%    0.0%  v8::internal::Scavenger::Process(v8::internal::OneshotBarrier*)
      1    0.0%    0.0%  v8::internal::Scanner::ScanIdentifierOrKeywordInner(v8::internal::Scanner::LiteralScope*)
      1    0.0%    0.0%  v8::internal::Scanner::Next()
      1    0.0%    0.0%  v8::internal::SaveContext::SaveContext(v8::internal::Isolate*)
      1    0.0%    0.0%  v8::internal::Runtime_CreateObjectLiteral(int, v8::internal::Object**, v8::internal::Isolate*)
      1    0.0%    0.0%  v8::internal::ParserBase<v8::internal::Parser>::ParsePropertyName(v8::internal::AstRawString const**, v8::internal::ParserBase<v8::internal::Parser>::PropertyKind*, bool*, bool*, bool*, bool*, bool*, bool*)
      1    0.0%    0.0%  v8::internal::ParserBase<v8::internal::Parser>::ParseBinaryExpression(int, bool, bool*)
      1    0.0%    0.0%  v8::internal::ParserBase<v8::internal::Parser>::ParseAssignmentExpression(bool, bool*)
      1    0.0%    0.0%  v8::internal::ParserBase<v8::internal::Parser>::BindingPatternUnexpectedToken()
      1    0.0%    0.0%  v8::internal::ParserBase<v8::internal::Parser>::ArrowFormalParametersUnexpectedToken()
      1    0.0%    0.0%  v8::internal::Object::ToNumber(v8::internal::Handle<v8::internal::Object>)
      1    0.0%    0.0%  v8::internal::MaybeHandle<v8::internal::Object> v8::internal::(anonymous namespace)::HandleApiCallHelper<false>(v8::internal::Isolate*, v8::internal::Handle<v8::internal::HeapObject>, v8::internal::Handle<v8::internal::HeapObject>, v8::internal::Handle<v8::internal::FunctionTemplateInfo>, v8::internal::Handle<v8::internal::Object>, v8::internal::BuiltinArguments)
      1    0.0%    0.0%  v8::internal::MaybeHandle<v8::internal::JSObject> v8::internal::(anonymous namespace)::CreateLiteral<v8::internal::(anonymous namespace)::ObjectBoilerplate>(v8::internal::Isolate*, v8::internal::Handle<v8::internal::FeedbackVector>, int, v8::internal::Handle<v8::internal::HeapObject>, int)
      1    0.0%    0.0%  v8::internal::Map::RawCopy(v8::internal::Handle<v8::internal::Map>, int, int)
      1    0.0%    0.0%  v8::internal::LookupIterator::WriteDataValue(v8::internal::Handle<v8::internal::Object>, bool)
      1    0.0%    0.0%  v8::internal::LookupIterator::UpdateProtector() [clone .part.352]
      1    0.0%    0.0%  v8::internal::LookupIterator::State v8::internal::LookupIterator::LookupInRegularHolder<false>(v8::internal::Map*, v8::internal::JSReceiver*)
      1    0.0%    0.0%  v8::internal::LookupIterator::PrepareTransitionToDataProperty(v8::internal::Handle<v8::internal::JSReceiver>, v8::internal::Handle<v8::internal::Object>, v8::internal::PropertyAttributes, v8::internal::Object::StoreFromKeyed)
      1    0.0%    0.0%  v8::internal::LookupIterator::ApplyTransitionToDataProperty(v8::internal::Handle<v8::internal::JSReceiver>)
      1    0.0%    0.0%  v8::internal::KeyedStoreIC::Store(v8::internal::Handle<v8::internal::Object>, v8::internal::Handle<v8::internal::Object>, v8::internal::Handle<v8::internal::Object>) [clone .constprop.199]
      1    0.0%    0.0%  v8::internal::JSReceiver::SetOrCopyDataProperties(v8::internal::Isolate*, v8::internal::Handle<v8::internal::JSReceiver>, v8::internal::Handle<v8::internal::Object>, v8::internal::ScopedVector<v8::internal::Handle<v8::internal::Object> > const*, bool)
      1    0.0%    0.0%  v8::internal::JSObject::SetPrototype(v8::internal::Handle<v8::internal::JSObject>, v8::internal::Handle<v8::internal::Object>, bool, v8::internal::ShouldThrow)
      1    0.0%    0.0%  v8::internal::JSObject::DefineOwnPropertyIgnoreAttributes(v8::internal::LookupIterator*, v8::internal::Handle<v8::internal::Object>, v8::internal::PropertyAttributes, v8::internal::ShouldThrow, v8::internal::JSObject::AccessorInfoHandling)
      1    0.0%    0.0%  v8::internal::IterateAndScavengePromotedObjectsVisitor::VisitPointers(v8::internal::HeapObject*, v8::internal::Object**, v8::internal::Object**)
      1    0.0%    0.0%  v8::internal::HeapObjectIterator::Next()
      1    0.0%    0.0%  v8::internal::HeapObject::synchronized_set_map(v8::internal::Map*)
      1    0.0%    0.0%  v8::internal::Heap::Scavenge()
      1    0.0%    0.0%  v8::internal::Heap::AllocateRaw(int, v8::internal::AllocationSpace, v8::internal::AllocationAlignment)
      1    0.0%    0.0%  v8::internal::Heap::AllocateFeedbackVector(v8::internal::SharedFunctionInfo*, v8::internal::PretenureFlag)
      1    0.0%    0.0%  v8::internal::FunctionCallbackArguments::Call(v8::internal::CallHandlerInfo*)
      1    0.0%    0.0%  v8::internal::FixStaleLeftTrimmedHandlesVisitor::VisitRootPointers(v8::internal::Root, char const*, v8::internal::Object**, v8::internal::Object**)
      1    0.0%    0.0%  v8::internal::FieldType::cast(v8::internal::Object*)
      1    0.0%    0.0%  v8::internal::FieldType::Any()
      1    0.0%    0.0%  v8::internal::Factory::NewFixedArrayWithMap(v8::internal::Heap::RootListIndex, int, v8::internal::PretenureFlag)
      1    0.0%    0.0%  v8::internal::ExpressionClassifier<v8::internal::ParserTypes<v8::internal::Parser> >::Accumulate(v8::internal::ExpressionClassifier<v8::internal::ParserTypes<v8::internal::Parser> >*, unsigned int)
      1    0.0%    0.0%  v8::internal::Deserializer<v8::internal::DefaultDeserializerAllocator>::ReadData(v8::internal::Object**, v8::internal::Object**, int, unsigned char*)
      1    0.0%    0.0%  v8::internal::AstValueFactory::GetOneByteStringInternal(v8::internal::Vector<unsigned char const>)
      1    0.0%    0.0%  v8::internal::Assembler::emit_operand(int, v8::internal::Operand)
      1    0.0%    0.0%  v8::internal::Assembler::bind_to(v8::internal::Label*, int)
      1    0.0%    0.0%  v8::internal::ApiNatives::InstantiateFunction(v8::internal::Handle<v8::internal::FunctionTemplateInfo>, v8::internal::MaybeHandle<v8::internal::Name>)
      1    0.0%    0.0%  v8::internal::AllocationResult v8::internal::Heap::CopyArrayAndGrow<v8::internal::PropertyArray>(v8::internal::PropertyArray*, int, v8::internal::PretenureFlag)
      1    0.0%    0.0%  v8::internal::AccountingAllocator::ReturnSegment(v8::internal::Segment*)
      1    0.0%    0.0%  v8::internal::(anonymous namespace)::UpdateNeedsHoleCheck(v8::internal::Variable*, v8::internal::VariableProxy*, v8::internal::Scope*)
      1    0.0%    0.0%  v8::internal::(anonymous namespace)::InvalidateOnePrototypeValidityCellInternal(v8::internal::Map*)
      1    0.0%    0.0%  v8::internal::(anonymous namespace)::InitializeIntrinsicFunctionNames()
      1    0.0%    0.0%  std::vector<v8::internal::compiler::SpecialRPONumberer::LoopInfo, v8::internal::ZoneAllocator<v8::internal::compiler::SpecialRPONumberer::LoopInfo> >::_M_fill_insert(__gnu_cxx::__normal_iterator<v8::internal::compiler::SpecialRPONumberer::LoopInfo*, std::vector<v8::internal::compiler::SpecialRPONumberer::LoopInfo, v8::internal::ZoneAllocator<v8::internal::compiler::SpecialRPONumberer::LoopInfo> > >, unsigned long, v8::internal::compiler::SpecialRPONumberer::LoopInfo const&)
      1    0.0%    0.0%  std::ios_base::ios_base()
      1    0.0%    0.0%  node::inspector::(anonymous namespace)::InspectorConsoleCall(v8::FunctionCallbackInfo<v8::Value> const&)
      1    0.0%    0.0%  node::LibuvStreamWrap::Initialize(v8::Local<v8::Object>, v8::Local<v8::Value>, v8::Local<v8::Context>)::{lambda(v8::FunctionCallbackInfo<v8::Value> const&)#1}::_FUN(v8::FunctionCallbackInfo<v8::Value> const&)
      1    0.0%    0.0%  getrn
      1    0.0%    0.0%  fwrite
      1    0.0%    0.0%  fflush
      1    0.0%    0.0%  do_futex_wait.constprop.1
      1    0.0%    0.0%  _dl_addr
      1    0.0%    0.0%  __pthread_mutex_unlock_usercnt
      1    0.0%    0.0%  __lll_unlock_wake

 [Summary]:
   ticks  total  nonlib   name
     74    0.0%    0.0%  JavaScript
  192582  100.0%  100.0%  C++
      8    0.0%    0.0%  GC
      0    0.0%          Shared libraries
      1    0.0%          Unaccounted

 [C++ entry points]:
   ticks    cpp   total   name
  192363   99.9%   99.8%  v8::internal::Runtime_CompileOptimized_Concurrent(int, v8::internal::Object**, v8::internal::Isolate*)
     66    0.0%    0.0%  v8::internal::Builtin_HandleApiCall(int, v8::internal::Object**, v8::internal::Isolate*)
     23    0.0%    0.0%  v8::internal::Runtime_CompileLazy(int, v8::internal::Object**, v8::internal::Isolate*)
     11    0.0%    0.0%  v8::internal::Runtime_CreateObjectLiteral(int, v8::internal::Object**, v8::internal::Isolate*)
     10    0.0%    0.0%  v8::internal::Runtime_CopyDataProperties(int, v8::internal::Object**, v8::internal::Isolate*)
      7    0.0%    0.0%  v8::internal::Runtime_LoadPropertyWithInterceptor(int, v8::internal::Object**, v8::internal::Isolate*)
      7    0.0%    0.0%  v8::internal::Runtime_KeyedStoreIC_Miss(int, v8::internal::Object**, v8::internal::Isolate*)
      2    0.0%    0.0%  v8::internal::Runtime_Interrupt(int, v8::internal::Object**, v8::internal::Isolate*)
      1    0.0%    0.0%  v8::internal::Runtime_RegExpExec(int, v8::internal::Object**, v8::internal::Isolate*)
      1    0.0%    0.0%  v8::internal::Runtime_InterpreterDeserializeLazy(int, v8::internal::Object**, v8::internal::Isolate*)
      1    0.0%    0.0%  v8::internal::Runtime_AddDictionaryProperty(int, v8::internal::Object**, v8::internal::Isolate*)
      1    0.0%    0.0%  v8::internal::Builtin_StringPrototypeLastIndexOf(int, v8::internal::Object**, v8::internal::Isolate*)
      1    0.0%    0.0%  v8::internal::Builtin_ObjectSetPrototypeOf(int, v8::internal::Object**, v8::internal::Isolate*)

 [Bottom up (heavy) profile]:
  Note: percentage shows a share of a particular caller in the total
  amount of its parent calls.
  Callers occupying less than 1.0% are not shown.

   ticks parent  name
  120013   62.3%  v8::internal::compiler::(anonymous namespace)::NeedsCheckHeapObject(v8::internal::compiler::Node*)
  120013  100.0%    v8::internal::Runtime_CompileOptimized_Concurrent(int, v8::internal::Object**, v8::internal::Isolate*)
  120013  100.0%      LazyCompile: ~entities.forEach /home/ivan/Downloads/inode27667/nodeJsPerformanceIssue.js:2785:18
  120013  100.0%        Builtin: ArrayForEach
  120013  100.0%          Script: ~<anonymous> /home/ivan/Downloads/inode27667/nodeJsPerformanceIssue.js:1:11
  120013  100.0%            LazyCompile: ~Module._compile internal/modules/cjs/loader.js:639:37

  46487   24.1%  v8::internal::compiler::NodeProperties::GetControlInput(v8::internal::compiler::Node*, int)
  46487  100.0%    v8::internal::Runtime_CompileOptimized_Concurrent(int, v8::internal::Object**, v8::internal::Isolate*)
  46487  100.0%      LazyCompile: ~entities.forEach /home/ivan/Downloads/inode27667/nodeJsPerformanceIssue.js:2785:18
  46487  100.0%        Builtin: ArrayForEach
  46487  100.0%          Script: ~<anonymous> /home/ivan/Downloads/inode27667/nodeJsPerformanceIssue.js:1:11
  46487  100.0%            LazyCompile: ~Module._compile internal/modules/cjs/loader.js:639:37

  13024    6.8%  v8::internal::compiler::OperatorProperties::HasContextInput(v8::internal::compiler::Operator const*)
  13024  100.0%    v8::internal::Runtime_CompileOptimized_Concurrent(int, v8::internal::Object**, v8::internal::Isolate*)
  13024  100.0%      LazyCompile: ~entities.forEach /home/ivan/Downloads/inode27667/nodeJsPerformanceIssue.js:2785:18
  13024  100.0%        Builtin: ArrayForEach
  13024  100.0%          Script: ~<anonymous> /home/ivan/Downloads/inode27667/nodeJsPerformanceIssue.js:1:11
  13024  100.0%            LazyCompile: ~Module._compile internal/modules/cjs/loader.js:639:37

  12811    6.6%  v8::internal::compiler::OperatorProperties::HasFrameStateInput(v8::internal::compiler::Operator const*)
  12811  100.0%    v8::internal::Runtime_CompileOptimized_Concurrent(int, v8::internal::Object**, v8::internal::Isolate*)
  12811  100.0%      LazyCompile: ~entities.forEach /home/ivan/Downloads/inode27667/nodeJsPerformanceIssue.js:2785:18
  12811  100.0%        Builtin: ArrayForEach
  12811  100.0%          Script: ~<anonymous> /home/ivan/Downloads/inode27667/nodeJsPerformanceIssue.js:1:11
  12811  100.0%            LazyCompile: ~Module._compile internal/modules/cjs/loader.js:639:37

@hellivan
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Looks like, it's an issue with Ajv performance in general right now -> epoberezkin/ajv#995

I don't think that it has to do something with AJV library since the extracted validation function in the example script is pure and simple JavaScript code, which even does not have any loops in it. Further also the testing data, an array of 1000 elements that however in fact only consists of two different elements (one failing and one succeeding) cloned multiple times, should be no real problem.
Nevertheless, execution freezes in NodeJS >= 10 (cpu usage of node process at 100% for an indefinite amount of time) even though we are only calling the same function with the same data multiple times.

@bnoordhuis bnoordhuis added the confirmed-bug Issues with confirmed bugs. label May 14, 2019
@bnoordhuis
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bnoordhuis commented May 14, 2019

Thanks, I see roughly the same thing: exponential behavior in the (edit: tier 2) JS compiler.

NeedsCheckHeapObject() calls itself recursively and it seems to be visiting the same 50 or so phi nodes over and over again. If I hack that function to return true instead of recursing, the script finishes in .1 second.

I'm reasonably sure it was introduced by v8/v8@947101c8734 so cc @bmeurer. That also explains why Node.js v8.x is unaffected because that change was introduced in V8 6.3 and Node.js v8.x ships 6.2.

edit: forgot to mention, V8 ToT seems to be affected as well.

@bmeurer
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bmeurer commented May 15, 2019

Good catch. I filed v8:9250 upstream.

@bmeurer
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bmeurer commented May 15, 2019

Consider floating this patch in Node 10 / 12.

bnoordhuis pushed a commit to bnoordhuis/io.js that referenced this issue May 16, 2019
Original commit message:

    Remove recursion from NeedsCheckHeapObject.

    We use the predicate NeedsCheckHeapObject in the compiler frontend to
    determine whether we can skip introducing CheckHeapObject nodes. But
    this predicate would also walk up the graph in case of Phis, which can
    result in really long compilation times (on the main thread). In the
    report in nodejs#27667, the compiler
    frontend alone took around 4-5mins of main thread time for a single
    function. With this patch the time goes down to 4-5ms.

    Bug: v8:9250
    Refs: nodejs#27667
    Change-Id: I231eb780ff04f949fa1669714f9af6ebfbcade05
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1612897
    Reviewed-by: Jaroslav Sevcik <[email protected]>
    Commit-Queue: Benedikt Meurer <[email protected]>
    Cr-Commit-Position: refs/heads/master@{#61503}

Fixes: nodejs#27667
targos pushed a commit that referenced this issue May 20, 2019
Original commit message:

    Remove recursion from NeedsCheckHeapObject.

    We use the predicate NeedsCheckHeapObject in the compiler frontend to
    determine whether we can skip introducing CheckHeapObject nodes. But
    this predicate would also walk up the graph in case of Phis, which can
    result in really long compilation times (on the main thread). In the
    report in #27667, the compiler
    frontend alone took around 4-5mins of main thread time for a single
    function. With this patch the time goes down to 4-5ms.

    Bug: v8:9250
    Refs: #27667
    Change-Id: I231eb780ff04f949fa1669714f9af6ebfbcade05
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1612897
    Reviewed-by: Jaroslav Sevcik <[email protected]>
    Commit-Queue: Benedikt Meurer <[email protected]>
    Cr-Commit-Position: refs/heads/master@{#61503}

Fixes: #27667

PR-URL: #27729
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>
Reviewed-By: James M Snell <[email protected]>
refack pushed a commit to targos/node that referenced this issue May 22, 2019
Original commit message:

    Remove recursion from NeedsCheckHeapObject.

    We use the predicate NeedsCheckHeapObject in the compiler frontend to
    determine whether we can skip introducing CheckHeapObject nodes. But
    this predicate would also walk up the graph in case of Phis, which can
    result in really long compilation times (on the main thread). In the
    report in nodejs#27667, the compiler
    frontend alone took around 4-5mins of main thread time for a single
    function. With this patch the time goes down to 4-5ms.

    Bug: v8:9250
    Refs: nodejs#27667
    Change-Id: I231eb780ff04f949fa1669714f9af6ebfbcade05
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1612897
    Reviewed-by: Jaroslav Sevcik <[email protected]>
    Commit-Queue: Benedikt Meurer <[email protected]>
    Cr-Commit-Position: refs/heads/master@{#61503}

Fixes: nodejs#27667

PR-URL: nodejs#27729
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>
Reviewed-By: James M Snell <[email protected]>
cjihrig pushed a commit to cjihrig/node that referenced this issue May 23, 2019
Original commit message:

    Remove recursion from NeedsCheckHeapObject.

    We use the predicate NeedsCheckHeapObject in the compiler frontend to
    determine whether we can skip introducing CheckHeapObject nodes. But
    this predicate would also walk up the graph in case of Phis, which can
    result in really long compilation times (on the main thread). In the
    report in nodejs#27667, the compiler
    frontend alone took around 4-5mins of main thread time for a single
    function. With this patch the time goes down to 4-5ms.

    Bug: v8:9250
    Refs: nodejs#27667
    Change-Id: I231eb780ff04f949fa1669714f9af6ebfbcade05
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1612897
    Reviewed-by: Jaroslav Sevcik <[email protected]>
    Commit-Queue: Benedikt Meurer <[email protected]>
    Cr-Commit-Position: refs/heads/master@{#61503}

Fixes: nodejs#27667

PR-URL: nodejs#27729
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>
Reviewed-By: James M Snell <[email protected]>
targos pushed a commit to targos/node that referenced this issue May 26, 2019
Original commit message:

    Remove recursion from NeedsCheckHeapObject.

    We use the predicate NeedsCheckHeapObject in the compiler frontend to
    determine whether we can skip introducing CheckHeapObject nodes. But
    this predicate would also walk up the graph in case of Phis, which can
    result in really long compilation times (on the main thread). In the
    report in nodejs#27667, the compiler
    frontend alone took around 4-5mins of main thread time for a single
    function. With this patch the time goes down to 4-5ms.

    Bug: v8:9250
    Refs: nodejs#27667
    Change-Id: I231eb780ff04f949fa1669714f9af6ebfbcade05
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1612897
    Reviewed-by: Jaroslav Sevcik <[email protected]>
    Commit-Queue: Benedikt Meurer <[email protected]>
    Cr-Commit-Position: refs/heads/master@{#61503}

Fixes: nodejs#27667

PR-URL: nodejs#27729
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>
Reviewed-By: James M Snell <[email protected]>
refack pushed a commit to targos/node that referenced this issue Jun 1, 2019
Original commit message:

    Remove recursion from NeedsCheckHeapObject.

    We use the predicate NeedsCheckHeapObject in the compiler frontend to
    determine whether we can skip introducing CheckHeapObject nodes. But
    this predicate would also walk up the graph in case of Phis, which can
    result in really long compilation times (on the main thread). In the
    report in nodejs#27667, the compiler
    frontend alone took around 4-5mins of main thread time for a single
    function. With this patch the time goes down to 4-5ms.

    Bug: v8:9250
    Refs: nodejs#27667
    Change-Id: I231eb780ff04f949fa1669714f9af6ebfbcade05
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1612897
    Reviewed-by: Jaroslav Sevcik <[email protected]>
    Commit-Queue: Benedikt Meurer <[email protected]>
    Cr-Commit-Position: refs/heads/master@{#61503}

Fixes: nodejs#27667

PR-URL: nodejs#27729
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>
Reviewed-By: James M Snell <[email protected]>
targos pushed a commit to targos/node that referenced this issue Jun 4, 2019
Original commit message:

    Remove recursion from NeedsCheckHeapObject.

    We use the predicate NeedsCheckHeapObject in the compiler frontend to
    determine whether we can skip introducing CheckHeapObject nodes. But
    this predicate would also walk up the graph in case of Phis, which can
    result in really long compilation times (on the main thread). In the
    report in nodejs#27667, the compiler
    frontend alone took around 4-5mins of main thread time for a single
    function. With this patch the time goes down to 4-5ms.

    Bug: v8:9250
    Refs: nodejs#27667
    Change-Id: I231eb780ff04f949fa1669714f9af6ebfbcade05
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1612897
    Reviewed-by: Jaroslav Sevcik <[email protected]>
    Commit-Queue: Benedikt Meurer <[email protected]>
    Cr-Commit-Position: refs/heads/master@{#61503}

Fixes: nodejs#27667

Backport-PR-URL: nodejs#28005
PR-URL: nodejs#27729
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>
Reviewed-By: James M Snell <[email protected]>
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confirmed-bug Issues with confirmed bugs. performance Issues and PRs related to the performance of Node.js. v8 engine Issues and PRs related to the V8 dependency.
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