v8 12.4.254 (node 22.4.1)
V8 is Google's open source JavaScript engine
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CpuProfile Class Reference

#include <v8-profiler.h>

Public Types

enum  SerializationFormat { kJSON = 0 }
 

Public Member Functions

Local< StringGetTitle () const
 
const CpuProfileNodeGetTopDownRoot () const
 
int GetSamplesCount () const
 
const CpuProfileNodeGetSample (int index) const
 
int64_t GetSampleTimestamp (int index) const
 
int64_t GetStartTime () const
 
StateTag GetSampleState (int index) const
 
EmbedderStateTag GetSampleEmbedderState (int index) const
 
int64_t GetEndTime () const
 
void Delete ()
 
void Serialize (OutputStream *stream, SerializationFormat format=kJSON) const
 

Detailed Description

CpuProfile contains a CPU profile in a form of top-down call tree (from main() down to functions that do all the work).

Definition at line 210 of file v8-profiler.h.

Member Enumeration Documentation

◆ SerializationFormat

Enumerator
kJSON 

Definition at line 212 of file v8-profiler.h.

Member Function Documentation

◆ Delete()

void Delete ( )

Deletes the profile and removes it from CpuProfiler's list. All pointers to nodes previously returned become invalid.

◆ GetEndTime()

int64_t GetEndTime ( ) const

Returns time when the profile recording was stopped (in microseconds) since some unspecified starting point. The point is equal to the starting point used by GetStartTime.

◆ GetSample()

const CpuProfileNode * GetSample ( int  index) const

Returns profile node corresponding to the top frame the sample at the given index.

◆ GetSampleEmbedderState()

EmbedderStateTag GetSampleEmbedderState ( int  index) const

Returns state of the embedder when sample was captured.

◆ GetSamplesCount()

int GetSamplesCount ( ) const

Returns number of samples recorded. The samples are not recorded unless |record_samples| parameter of CpuProfiler::StartCpuProfiling is true.

◆ GetSampleState()

StateTag GetSampleState ( int  index) const

Returns state of the vm when sample was captured.

◆ GetSampleTimestamp()

int64_t GetSampleTimestamp ( int  index) const

Returns the timestamp of the sample. The timestamp is the number of microseconds since some unspecified starting point. The point is equal to the starting point used by GetStartTime.

◆ GetStartTime()

int64_t GetStartTime ( ) const

Returns time when the profile recording was started (in microseconds) since some unspecified starting point.

◆ GetTitle()

Local< String > GetTitle ( ) const

Returns CPU profile title.

◆ GetTopDownRoot()

const CpuProfileNode * GetTopDownRoot ( ) const

Returns the root node of the top down call tree.

◆ Serialize()

void Serialize ( OutputStream stream,
SerializationFormat  format = kJSON 
) const

Prepare a serialized representation of the profile. The result is written into the stream provided in chunks of specified size.

For the JSON format, heap contents are represented as an object with the following structure:

{ nodes: [nodes array], startTime: number, endTime: number samples: [strings array] timeDeltas: [numbers array] }


The documentation for this class was generated from the following file: