DebugSettings
Collection of various developer-facing diagnostics information.
This class is not creatable. Instances of this class cannot be created with Instance.new.
This class is a settings container. It contains settings that affect the behavior of the peer.
This class is not browsable. It is not visible in Studio's object browser.
| Memory category | Instances |
|---|
Member index 8
Removed member index 50
Description
The DebugSettings allows you to view diagnostics information regarding Roblox. It is labeled as Diagnostics in the Roblox Studio Settings menu.
History 140
- 553 Change Default of TickCountPreciseOverride from to
- 553 Change Default of RobloxVersion from to
- 553 Change Default of ReportSoundWarnings from to
- 553 Change Default of PlayerCount from to
- 553 Change Default of JobCount from to
- 553 Change Default of IsScriptStackTracingEnabled from to
- 553 Change Default of InstanceCount from to
- 553 Change Default of DataModel from to
- 486 Change ThreadSafety of TickCountPreciseOverride from ReadOnly to ReadSafe
- 486 Change ThreadSafety of RobloxVersion from ReadOnly to ReadSafe
- 486 Change ThreadSafety of ReportSoundWarnings from ReadOnly to ReadSafe
- 486 Change ThreadSafety of PlayerCount from ReadOnly to ReadSafe
- 486 Change ThreadSafety of JobCount from ReadOnly to ReadSafe
- 486 Change ThreadSafety of IsScriptStackTracingEnabled from ReadOnly to ReadSafe
- 486 Change ThreadSafety of InstanceCount from ReadOnly to ReadSafe
- 486 Change ThreadSafety of DataModel from ReadOnly to ReadSafe
- 462 Change ThreadSafety of TickCountPreciseOverride from to ReadOnly
- 462 Change ThreadSafety of RobloxVersion from to ReadOnly
- 462 Change ThreadSafety of ReportSoundWarnings from to ReadOnly
- 462 Change ThreadSafety of PlayerCount from to ReadOnly
- 462 Change ThreadSafety of JobCount from to ReadOnly
- 462 Change ThreadSafety of IsScriptStackTracingEnabled from to ReadOnly
- 462 Change ThreadSafety of InstanceCount from to ReadOnly
- 462 Change ThreadSafety of DataModel from to ReadOnly
- 431 Remove IsFmodProfilingEnabled
- 429 Add IsFmodProfilingEnabled
- 430 Remove IsFmodProfilingEnabled
- 413 Change Tags of DebugSettings from [Settings, NotBrowsable] to [NotCreatable, Settings, NotBrowsable]
- 407 Remove VideoMemory
- 407 Remove SystemProductName
- 407 Remove SIMD
- 407 Remove RobloxProductName
- 407 Remove OsVer
- 407 Remove OsPlatformId
- 407 Remove OsPlatform
- 407 Remove OsIs64Bit
- 407 Remove GfxCard
- 407 Remove ErrorReporting
- 401 Remove LuaRamLimit
- 350 Change Tags of DebugSettings from [Service, NotBrowsable] to [Settings, NotBrowsable]
- 311 Remove SetBlockingRemove
- 311 Remove LegacyScriptMode
- 278 Remove NameDatabaseSize
- 278 Remove NameDatabaseBytes
- 271 Remove ResetCdnFailureCounts
- 271 Remove VirtualBytes
- 271 Remove VertexShaderModel
- 271 Remove TotalProcessorTime
- 271 Remove TotalPhysicalMemory
- 271 Remove RobloxSuccessCount
- 271 Remove RobloxRespoceTime
- 271 Remove RobloxFailureCount
- 271 Remove Resolution
- 271 Remove ReportExtendedMachineConfiguration
- 271 Remove RAM
- 271 Remove ProcessorTime
- 271 Remove ProcessCores
- 271 Remove PrivateWorkingSetBytes
- 271 Remove PrivateBytes
- 271 Remove PixelShaderModel
- 271 Remove PageFileBytes
- 271 Remove PageFaultsPerSecond
- 271 Remove LastCdnFailureTimeSpan
- 271 Remove ElapsedTime
- 271 Remove CpuSpeed
- 271 Remove CpuCount
- 271 Remove CdnSuccessCount
- 271 Remove CdnResponceTime
- 271 Remove CdnFailureCount
- 271 Remove CPU
- 271 Remove BlockMeshSize
- 271 Remove AvailablePhysicalMemory
- 271 Remove AltCdnSuccessCount
- 271 Remove AltCdnFailureCount
- 270 Remove ProfilingWindow
- 270 Remove IsProfilingEnabled
- 214 Remove InstanceCountLimit
- 214 Remove EnforceInstanceCountLimit
- 97 Add SIMD
- 79 Add RobloxProductName
- 78 Remove RobloxProductName
- 79 Add RobloxProductName
- 69 Add OsIs64Bit
- 68 Change Tags of LegacyScriptMode from [] to [Deprecated]
- 47 Add SetBlockingRemove
- 47 Add ResetCdnFailureCounts
- 47 Add LegacyScriptMode
- 47 Add VirtualBytes
- 47 Add VideoMemory
- 47 Add VertexShaderModel
- 47 Add TotalProcessorTime
- 47 Add TotalPhysicalMemory
- 47 Add TickCountPreciseOverride
- 47 Add SystemProductName
- 47 Add RobloxVersion
- 47 Add RobloxSuccessCount
- 47 Add RobloxRespoceTime
- 47 Add RobloxFailureCount
- 47 Add Resolution
- 47 Add ReportSoundWarnings
- 47 Add ReportExtendedMachineConfiguration
- 47 Add RAM
- 47 Add ProfilingWindow
- 47 Add ProcessorTime
- 47 Add ProcessCores
- 47 Add PrivateWorkingSetBytes
- 47 Add PrivateBytes
- 47 Add PlayerCount
- 47 Add PixelShaderModel
- 47 Add PageFileBytes
- 47 Add PageFaultsPerSecond
- 47 Add OsVer
- 47 Add OsPlatformId
- 47 Add OsPlatform
- 47 Add NameDatabaseSize
- 47 Add NameDatabaseBytes
- 47 Add LuaRamLimit
- 47 Add LastCdnFailureTimeSpan
- 47 Add JobCount
- 47 Add IsScriptStackTracingEnabled
- 47 Add IsProfilingEnabled
- 47 Add IsFmodProfilingEnabled
- 47 Add InstanceCountLimit
- 47 Add InstanceCount
- 47 Add GfxCard
- 47 Add ErrorReporting
- 47 Add EnforceInstanceCountLimit
- 47 Add ElapsedTime
- 47 Add DataModel
- 47 Add CpuSpeed
- 47 Add CpuCount
- 47 Add CdnSuccessCount
- 47 Add CdnResponceTime
- 47 Add CdnFailureCount
- 47 Add CPU
- 47 Add BlockMeshSize
- 47 Add AvailablePhysicalMemory
- 47 Add AltCdnSuccessCount
- 47 Add AltCdnFailureCount
- 47 Add DebugSettings
Members 8
DataModel
| Type | Default | |
|---|---|---|
| int | ||
Describes whether a DataModel is actively in memory, as an integer (where 1 = true, and 0 = false).
This property is not replicated. Its interface does not cross the network boundary.
This property is read-only. Its value can be read, but it cannot be modified.
| Thread safety | ReadSafe |
|---|---|
| Category | Performance |
| Loaded/Saved | false/true |
InstanceCount
| Type | Default | |
|---|---|---|
| int | ||
The number of instances active in the simulation.
This property is not replicated. Its interface does not cross the network boundary.
This property is read-only. Its value can be read, but it cannot be modified.
| Thread safety | ReadSafe |
|---|---|
| Category | Performance |
| Loaded/Saved | false/true |
History 4
- 553 Change Default of InstanceCount from to
- 486 Change ThreadSafety of InstanceCount from ReadOnly to ReadSafe
- 462 Change ThreadSafety of InstanceCount from to ReadOnly
- 47 Add InstanceCount
IsScriptStackTracingEnabled
| Type | Default | |
|---|---|---|
| bool | ||
Whether or not a stacktrace is displayed in the output for an error.
| Thread safety | ReadSafe |
|---|---|
| Category | Errors |
| Loaded/Saved | true |
History 4
- 553 Change Default of IsScriptStackTracingEnabled from to
- 486 Change ThreadSafety of IsScriptStackTracingEnabled from ReadOnly to ReadSafe
- 462 Change ThreadSafety of IsScriptStackTracingEnabled from to ReadOnly
- 47 Add IsScriptStackTracingEnabled
JobCount
| Type | Default | |
|---|---|---|
| int | ||
Returns the number of internal DataModel jobs actively being processed.
This property is not replicated. Its interface does not cross the network boundary.
This property is read-only. Its value can be read, but it cannot be modified.
| Thread safety | ReadSafe |
|---|---|
| Category | Performance |
| Loaded/Saved | false/true |
PlayerCount
| Type | Default | |
|---|---|---|
| int | ||
The number of players currently in the active game-instance.
This property is not replicated. Its interface does not cross the network boundary.
This property is read-only. Its value can be read, but it cannot be modified.
| Thread safety | ReadSafe |
|---|---|
| Category | Performance |
| Loaded/Saved | false/true |
History 4
- 553 Change Default of PlayerCount from to
- 486 Change ThreadSafety of PlayerCount from ReadOnly to ReadSafe
- 462 Change ThreadSafety of PlayerCount from to ReadOnly
- 47 Add PlayerCount
ReportSoundWarnings
| Type | Default | |
|---|---|---|
| bool | ||
Whether or not sound warnings should be reported.
| Thread safety | ReadSafe |
|---|---|
| Category | Errors |
| Loaded/Saved | true |
History 4
- 553 Change Default of ReportSoundWarnings from to
- 486 Change ThreadSafety of ReportSoundWarnings from ReadOnly to ReadSafe
- 462 Change ThreadSafety of ReportSoundWarnings from to ReadOnly
- 47 Add ReportSoundWarnings
RobloxVersion
| Type | Default | |
|---|---|---|
| string | ||
The current client version of Roblox. Can also be retrieved by using the version() function.
This property is not replicated. Its interface does not cross the network boundary.
This property is read-only. Its value can be read, but it cannot be modified.
| Thread safety | ReadSafe |
|---|---|
| Category | Profile |
| Loaded/Saved | false/true |
History 4
- 553 Change Default of RobloxVersion from to
- 486 Change ThreadSafety of RobloxVersion from ReadOnly to ReadSafe
- 462 Change ThreadSafety of RobloxVersion from to ReadOnly
- 47 Add RobloxVersion
TickCountPreciseOverride
| Type | Default | |
|---|---|---|
| TickCountSampleMethod | ||
Sets the internal sampling method used to measure elapsed time with consistency across platforms.
| Thread safety | ReadSafe |
|---|---|
| Category | Benchmarking |
| Loaded/Saved | true |
History 4
- 553 Change Default of TickCountPreciseOverride from to
- 486 Change ThreadSafety of TickCountPreciseOverride from ReadOnly to ReadSafe
- 462 Change ThreadSafety of TickCountPreciseOverride from to ReadOnly
- 47 Add TickCountPreciseOverride
Removed members 50
AltCdnFailureCount
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove AltCdnFailureCount
- 47 Add AltCdnFailureCount
AltCdnSuccessCount
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove AltCdnSuccessCount
- 47 Add AltCdnSuccessCount
AvailablePhysicalMemory
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove AvailablePhysicalMemory
- 47 Add AvailablePhysicalMemory
BlockMeshSize
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove BlockMeshSize
- 47 Add BlockMeshSize
CPU
| Type | Default | |
|---|---|---|
| string | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
CdnFailureCount
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove CdnFailureCount
- 47 Add CdnFailureCount
CdnResponceTime
| Type | Default | |
|---|---|---|
| double | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove CdnResponceTime
- 47 Add CdnResponceTime
CdnSuccessCount
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove CdnSuccessCount
- 47 Add CdnSuccessCount
CpuCount
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
CpuSpeed
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
ElapsedTime
| Type | Default | |
|---|---|---|
| double | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove ElapsedTime
- 47 Add ElapsedTime
EnforceInstanceCountLimit
| Type | Default | |
|---|---|---|
| bool | ||
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
ErrorReporting
| Type | Default | |
|---|---|---|
| ErrorReporting | ||
| Category | Errors |
|---|---|
| Loaded/Saved | true |
History 2
- 407 Remove ErrorReporting
- 47 Add ErrorReporting
GfxCard
| Type | Default | |
|---|---|---|
| string | ||
This property is not replicated. Its interface does not cross the network boundary.
This property is read-only. Its value can be read, but it cannot be modified.
| Category | Profile |
|---|---|
| Loaded/Saved | false/true |
InstanceCountLimit
| Type | Default | |
|---|---|---|
| int | ||
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 214 Remove InstanceCountLimit
- 47 Add InstanceCountLimit
IsFmodProfilingEnabled
| Type | Default | |
|---|---|---|
| bool | ||
| Category | Benchmarking |
|---|---|
| Loaded/Saved | true |
History 4
- 431 Remove IsFmodProfilingEnabled
- 429 Add IsFmodProfilingEnabled
- 430 Remove IsFmodProfilingEnabled
- 47 Add IsFmodProfilingEnabled
IsProfilingEnabled
| Type | Default | |
|---|---|---|
| bool | ||
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 270 Remove IsProfilingEnabled
- 47 Add IsProfilingEnabled
LastCdnFailureTimeSpan
| Type | Default | |
|---|---|---|
| double | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove LastCdnFailureTimeSpan
- 47 Add LastCdnFailureTimeSpan
LegacyScriptMode
| Parameters (0) | ||
|---|---|---|
| No parameters. | ||
| Returns (1) | ||
| void | ||
This function is deprecated. It exists only for backward compatibility, and should not be used for new work.
| Security | LocalUserSecurity |
|---|
History 3
- 311 Remove LegacyScriptMode
- 68 Change Tags of LegacyScriptMode from [] to [Deprecated]
- 47 Add LegacyScriptMode
LuaRamLimit
| Type | Default | |
|---|---|---|
| int | ||
| Category | Limits |
|---|---|
| Loaded/Saved | true |
History 2
- 401 Remove LuaRamLimit
- 47 Add LuaRamLimit
NameDatabaseBytes
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 278 Remove NameDatabaseBytes
- 47 Add NameDatabaseBytes
NameDatabaseSize
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 278 Remove NameDatabaseSize
- 47 Add NameDatabaseSize
OsIs64Bit
| Type | Default | |
|---|---|---|
| bool | ||
This property is not replicated. Its interface does not cross the network boundary.
This property is read-only. Its value can be read, but it cannot be modified.
| Category | Profile |
|---|---|
| Loaded/Saved | false/true |
OsPlatform
| Type | Default | |
|---|---|---|
| string | ||
This property is not replicated. Its interface does not cross the network boundary.
This property is read-only. Its value can be read, but it cannot be modified.
| Category | Profile |
|---|---|
| Loaded/Saved | false/true |
History 2
- 407 Remove OsPlatform
- 47 Add OsPlatform
OsPlatformId
| Type | Default | |
|---|---|---|
| int | ||
This property is not replicated. Its interface does not cross the network boundary.
This property is read-only. Its value can be read, but it cannot be modified.
| Category | Profile |
|---|---|
| Loaded/Saved | false/true |
History 2
- 407 Remove OsPlatformId
- 47 Add OsPlatformId
OsVer
| Type | Default | |
|---|---|---|
| string | ||
This property is not replicated. Its interface does not cross the network boundary.
This property is read-only. Its value can be read, but it cannot be modified.
| Category | Profile |
|---|---|
| Loaded/Saved | false/true |
PageFaultsPerSecond
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove PageFaultsPerSecond
- 47 Add PageFaultsPerSecond
PageFileBytes
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove PageFileBytes
- 47 Add PageFileBytes
PixelShaderModel
| Type | Default | |
|---|---|---|
| float | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove PixelShaderModel
- 47 Add PixelShaderModel
PrivateBytes
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove PrivateBytes
- 47 Add PrivateBytes
PrivateWorkingSetBytes
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove PrivateWorkingSetBytes
- 47 Add PrivateWorkingSetBytes
ProcessCores
| Type | Default | |
|---|---|---|
| double | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove ProcessCores
- 47 Add ProcessCores
ProcessorTime
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove ProcessorTime
- 47 Add ProcessorTime
ProfilingWindow
| Type | Default | |
|---|---|---|
| double | ||
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 270 Remove ProfilingWindow
- 47 Add ProfilingWindow
RAM
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
ReportExtendedMachineConfiguration
| Type | Default | |
|---|---|---|
| bool | ||
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
ResetCdnFailureCounts
| Parameters (0) | ||
|---|---|---|
| No parameters. | ||
| Returns (1) | ||
| Tuple | ||
| Security | LocalUserSecurity |
|---|
History 2
- 271 Remove ResetCdnFailureCounts
- 47 Add ResetCdnFailureCounts
Resolution
| Type | Default | |
|---|---|---|
| string | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove Resolution
- 47 Add Resolution
RobloxFailureCount
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove RobloxFailureCount
- 47 Add RobloxFailureCount
RobloxProductName
| Type | Default | |
|---|---|---|
| string | ||
This property is not replicated. Its interface does not cross the network boundary.
This property is read-only. Its value can be read, but it cannot be modified.
| Category | Profile |
|---|---|
| Loaded/Saved | false/true |
History 4
- 407 Remove RobloxProductName
- 79 Add RobloxProductName
- 78 Remove RobloxProductName
- 79 Add RobloxProductName
RobloxRespoceTime
| Type | Default | |
|---|---|---|
| double | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove RobloxRespoceTime
- 47 Add RobloxRespoceTime
RobloxSuccessCount
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove RobloxSuccessCount
- 47 Add RobloxSuccessCount
SIMD
| Type | Default | |
|---|---|---|
| string | ||
This property is not replicated. Its interface does not cross the network boundary.
This property is read-only. Its value can be read, but it cannot be modified.
| Category | Profile |
|---|---|
| Loaded/Saved | false/true |
SetBlockingRemove
| Parameters (1) | ||
|---|---|---|
| value | bool | |
| Returns (1) | ||
| void | ||
| Security | LocalUserSecurity |
|---|
History 2
- 311 Remove SetBlockingRemove
- 47 Add SetBlockingRemove
SystemProductName
| Type | Default | |
|---|---|---|
| string | ||
This property is not replicated. Its interface does not cross the network boundary.
This property is read-only. Its value can be read, but it cannot be modified.
| Category | Profile |
|---|---|
| Loaded/Saved | false/true |
History 2
- 407 Remove SystemProductName
- 47 Add SystemProductName
TotalPhysicalMemory
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove TotalPhysicalMemory
- 47 Add TotalPhysicalMemory
TotalProcessorTime
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove TotalProcessorTime
- 47 Add TotalProcessorTime
VertexShaderModel
| Type | Default | |
|---|---|---|
| float | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove VertexShaderModel
- 47 Add VertexShaderModel
VideoMemory
| Type | Default | |
|---|---|---|
| int | ||
This property is not replicated. Its interface does not cross the network boundary.
This property is read-only. Its value can be read, but it cannot be modified.
| Category | Profile |
|---|---|
| Loaded/Saved | false/true |
History 2
- 407 Remove VideoMemory
- 47 Add VideoMemory
VirtualBytes
| Type | Default | |
|---|---|---|
| int | ||
This property is read-only. Its value can be read, but it cannot be modified.
| Category | |
|---|---|
| Loaded/Saved | false |
History 2
- 271 Remove VirtualBytes
- 47 Add VirtualBytes