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Reference API Roblox

HeapProfilerService

Provides methods which return Luau heap memory usage summaries on client and server.

This class is not creatable. Instances of this class cannot be created with Instance.new.
This class is a service. It is a singleton that may be acquired with GetService.
Tags: [NotCreatable, Service]

Member index 4

HistoryMember
661ClientRequestDataAsync(player: Player): string
661ServerRequestDataAsync(): string
661OnNewData(player: Player, jsonString: buffer, id: int, compressedLength: int, uncompressedLength: int)
inherited from Instance
731Archivable: bool
731Capabilities: SecurityCapabilities
731IsInSandbox: bool
731Name: string
731Parent: Instance
731PredictionMode: PredictionMode
731Sandboxed: bool
731UniqueId: UniqueId
576AddTag(tag: string): null
573ClearAllChildren(): null
462Clone(): Instance
573Destroy(): null
486FindFirstAncestor(name: string): Instance
486FindFirstAncestorOfClass(className: string): Instance
486FindFirstAncestorWhichIsA(className: string): Instance
486FindFirstChild(name: string, recursive: bool = false): Instance
486FindFirstChildOfClass(className: string): Instance
486FindFirstChildWhichIsA(className: string, recursive: bool = false): Instance
486FindFirstDescendant(name: string): Instance
563GetActor(): Actor
486GetAttribute(attribute: string): Variant
462GetAttributeChangedSignal(attribute: string): RBXScriptSignal
631GetAttributes(): Dictionary
648GetChildren(): Instances
462GetDebugId(scopeLength: int = 4): string
707GetDescendants(): Instances
486GetFullName(): string
706GetStyled(name: string, selector: string?): Variant
657GetStyledPropertyChangedSignal(property: string): RBXScriptSignal
576GetTags(): Array
576HasTag(tag: string): bool
486IsAncestorOf(descendant: Instance): bool
486IsDescendantOf(ancestor: Instance): bool
664IsPropertyModified(property: string): bool
698QueryDescendants(selector: string): Instances
573Remove(): null
576RemoveTag(tag: string): null
664ResetPropertyToDefault(property: string): null
573SetAttribute(attribute: string, value: Variant): null
462WaitForChild(childName: string, timeOut: double): Instance
731children(): Instances
731clone(): Instance
731destroy(): null
731findFirstChild(name: string, recursive: bool = false): Instance
731getChildren(): Instances
731isDescendantOf(ancestor: Instance): bool
731remove(): null
462AncestryChanged(child: Instance, parent: Instance)
462AttributeChanged(attribute: string)
462ChildAdded(child: Instance)
462ChildRemoved(child: Instance)
462DescendantAdded(descendant: Instance)
462DescendantRemoving(descendant: Instance)
500Destroying()
657StyledPropertiesChanged()
731childAdded(child: Instance)
inherited from Object
731ClassName: string
731className: string
647GetPropertyChangedSignal(property: string): RBXScriptSignal
647IsA(className: string): bool
731isA(className: string): bool
647Changed(property: string)

Description

The HeapProfilerService provides methods which return summaries of Luau heap memory usage on client and server, useful for analyzing the memory allocated to scripts. The returned summaries break down Luau heap memory usage by:

  • VM type, for example table, string, or userdata.
  • Memory category (a value assigned to an object when it is allocated, depending on the thread it is allocated from).
  • The Roblox engine class (both total size and instance count).

They also contain a graph view of the Luau heap's memory usage, where each node of the graph is an object allocated in the Luau heap and edges represent references between objects.

HeapProfilerService can also be used to create multiple snapshots to compare differences in script memory usage over time.

History 7

Members 4

ClientRequestDataAsync

Parameters (1)
playerPlayer
Returns (1)
string
This function yields. It will block the calling thread until completion.

History 1

Tags: [Yields]

OnNewData

Parameters (5)
playerPlayer
jsonStringbuffer
idint
compressedLengthint
uncompressedLengthint

History 1

ServerRequestDataAsync

Parameters (0)
No parameters.
Returns (1)
string
This function yields. It will block the calling thread until completion.

History 1

Tags: [Yields]

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