Class JSConfig

java.lang.Object
com.oracle.truffle.js.runtime.JSConfig
public final class JSConfig extends Object
This class stores magic numbers and other configuration values.

  • Field Details

    • SOFT_MAX_ARRAY_LENGTH

      public static final int SOFT_MAX_ARRAY_LENGTH
      See jdk.internal.util.ArraysSupport#SOFT_MAX_ARRAY_LENGTH.
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    • MaxConsolePrintProperties

      public static final int MaxConsolePrintProperties
      When printing to console/inspector, only print that many properties.
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    • InitialArraySize

      public static final int InitialArraySize
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    • MaxArrayHoleSize

      public static final int MaxArrayHoleSize
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    • MaxFlatArraySize

      public static final int MaxFlatArraySize
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    • TrackArrayAllocationSites

      public static final boolean TrackArrayAllocationSites

    • BigArrayThreshold

      public static final int BigArrayThreshold
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    • MarkElementsNonNull

      public static final boolean MarkElementsNonNull
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    • DebugCounters

      public static final boolean DebugCounters

    • ECMAScript5

      public static final int ECMAScript5
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    • ECMAScript6

      public static final int ECMAScript6
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    • ECMAScript2015

      public static final int ECMAScript2015
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    • ECMAScript2016

      public static final int ECMAScript2016
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    • ECMAScript2017

      public static final int ECMAScript2017
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    • ECMAScript2018

      public static final int ECMAScript2018
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    • ECMAScript2019

      public static final int ECMAScript2019
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    • ECMAScript2020

      public static final int ECMAScript2020
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    • ECMAScript2021

      public static final int ECMAScript2021
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    • ECMAScript2022

      public static final int ECMAScript2022
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    • ECMAScript2023

      public static final int ECMAScript2023
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    • ECMAScript2024

      public static final int ECMAScript2024
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    • ECMAScript2025

      public static final int ECMAScript2025
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    • ECMAScriptVersionYearDelta

      public static final int ECMAScriptVersionYearDelta
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    • LatestECMAScriptVersion

      public static final int LatestECMAScriptVersion
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    • StagingECMAScriptVersion

      public static final int StagingECMAScriptVersion
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    • AnnexB

      public static final boolean AnnexB
      Enable Annex B "Additional ECMAScript Features for Web Browsers".
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    • InteropLibraryLimit

      public static final int InteropLibraryLimit
      Default cache limit for dispatched InteropLibrary.
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    • PropertyCacheLimit

      public static final int PropertyCacheLimit
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    • FunctionCacheLimit

      public static final int FunctionCacheLimit
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    • AssertFinalPropertySpecialization

      public static final boolean AssertFinalPropertySpecialization
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    • FunctionCacheOnInstance

      public static final boolean FunctionCacheOnInstance
      Try to cache by function object instead of call target.
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    • BoundFunctionUnpackLimit

      public static final int BoundFunctionUnpackLimit
      Maximum bound function nesting level to unpack in specialization.
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    • DictionaryObject

      public static final boolean DictionaryObject
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    • DictionaryObjectThreshold

      public static final int DictionaryObjectThreshold
      Migrate objects to dictionary mode when the number of properties exceeds this threshold.
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    • DictionaryObjectTransitionThreshold

      public static final int DictionaryObjectTransitionThreshold
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    • MergeShapes

      public static final boolean MergeShapes
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    • MergeCompatibleLocations

      public static boolean MergeCompatibleLocations

    • LazyStrings

      public static final boolean LazyStrings
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    • MinLazyStringLength

      public static final int MinLazyStringLength
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    • ReturnOptimizer

      public static final boolean ReturnOptimizer
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    • ReturnValueInFrame

      public static final boolean ReturnValueInFrame
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    • LocalVarIncDecNode

      public static final boolean LocalVarIncDecNode
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    • OptimizeApplyArguments

      public static final boolean OptimizeApplyArguments
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    • OptimizeNoFallthroughSwitch

      public static boolean OptimizeNoFallthroughSwitch

    • ManyBlockScopes

      public static final boolean ManyBlockScopes
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    • YieldResultInFrame

      public static final boolean YieldResultInFrame
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    • LazyFunctionData

      public static final boolean LazyFunctionData
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    • SplitModuleRoot

      public static final boolean SplitModuleRoot
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    • PrintAst

      public static final boolean PrintAst
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    • PrintParse

      public static final boolean PrintParse
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    • MaxCompiledRegexCacheLength

      public static final int MaxCompiledRegexCacheLength
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    • TrimCompiledRegexCache

      public static final boolean TrimCompiledRegexCache
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    • RestrictForceSplittingBuiltins

      public static final boolean RestrictForceSplittingBuiltins
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    • UseSuperOperations

      public static final boolean UseSuperOperations
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    • FastOwnKeys

      public static final boolean FastOwnKeys
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    • InlineTrivialBuiltins

      public static final boolean InlineTrivialBuiltins
      AST-level inlining of trivial built-in functions (e.g. String.prototype.charAt).
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    • DetailedCallTargetNames

      public static final boolean DetailedCallTargetNames
      [Construct] as part of the CallTarget names. Off by default (footprint).
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    • SpreadArgumentPlaceholderCount

      public static final int SpreadArgumentPlaceholderCount
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    • EagerStackTrace

      public static final boolean EagerStackTrace
      Always capture stack trace eagerly.
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    • SkipPrototypeShapeCheck

      public static final boolean SkipPrototypeShapeCheck
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    • SkipGlobalShapeCheck

      public static final boolean SkipGlobalShapeCheck
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    • SkipFinalShapeCheck

      public static final boolean SkipFinalShapeCheck
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    • LeafShapeAssumption

      public static final boolean LeafShapeAssumption
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    • PropertyAssumption

      public static final boolean PropertyAssumption
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    • SubstrateVM

      public static final boolean SubstrateVM

    • TracePolymorphicPropertyAccess

      public static final boolean TracePolymorphicPropertyAccess

    • TraceMegamorphicPropertyAccess

      public static final boolean TraceMegamorphicPropertyAccess
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    • TraceFunctionCache

      public static final boolean TraceFunctionCache
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    • TraceArrayTransitions

      public static final boolean TraceArrayTransitions
      Traces transitions between dynamic array types.

    • TraceArrayWrites

      public static final boolean TraceArrayWrites
      Traces all array writes with their access mode.
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    • TraceDictionaryObject

      public static final boolean TraceDictionaryObject
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    • UseSingletonSymbols

      public static final boolean UseSingletonSymbols
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