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Performance issue in NodeJS >= 10.0.0 #27667

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Closed
Performance issue in NodeJS >= 10.0.0#27667
Labels
confirmed-bugIssues and PRs for confirmed bugs.performanceIssues and PRs related to the performance of Node.js.v8 engineIssues and PRs related to the V8 dependency.

Description

@hellivan
hellivan
opened on May 13, 2019

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).

Activity

  1. ZYSzys
    added
    performanceIssues and PRs related to the performance of Node.js.
    on May 13, 2019
  2. Fishrock123
    added
    v8 engineIssues and PRs related to the V8 dependency.
    on May 13, 2019

  3. bricss commented on May 13, 2019

    @bricss
    bricss
    on May 13, 2019
    Contributor

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

  4. bnoordhuis commented on May 13, 2019

    @bnoordhuis
    bnoordhuis
    on May 13, 2019
    Member

    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.

  5. hellivan commented on May 14, 2019

    @hellivan
    hellivan
    on May 14, 2019
    Author

    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:

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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
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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

  6. hellivan commented on May 14, 2019

    @hellivan
    hellivan
    on May 14, 2019
    Author

    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.

  7. bnoordhuis
    added
    confirmed-bugIssues and PRs for confirmed bugs.
    on May 14, 2019

  8. bnoordhuis commented on May 14, 2019

    @bnoordhuis
    bnoordhuis
    on May 14, 2019
    Member

    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.

  9. bmeurer commented on May 15, 2019

    @bmeurer
    bmeurer
    on May 15, 2019
    Member

    Good catch. I filed v8:9250 upstream.

  10. bmeurer commented on May 15, 2019

    @bmeurer
    bmeurer
    on May 15, 2019
    Member

    Consider floating this patch in Node 10 / 12.

  11. bnoordhuis
    added a commit that references this issue on May 16, 2019

    deps: V8: cherry-pick cca9ae3c9a

    5176a79
  12. addaleax
    closed this as completedin 6f7e8b4on May 19, 2019
  13. targos
    added 2 commits that reference this issue on May 20, 2019

    deps: V8: cherry-pick cca9ae3c9a

    83f2430
  14. refack
    added a commit that references this issue on May 22, 2019

    deps: V8: cherry-pick cca9ae3c9a

    451c238
  15. cjihrig
    added a commit that references this issue on May 23, 2019

    deps: V8: cherry-pick cca9ae3c9a

    cc7690f
  16. targos
    added a commit that references this issue on May 26, 2019

    deps: V8: cherry-pick cca9ae3c9a

    59ec46d
  17. sjarmak
    added a commit that references this issue on Jul 27, 2026

    deps: V8: cherry-pick cca9ae3c9a

    6f7e8b4
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