CpuProfiler Class Reference

#include <v8-profiler.h>

Public Member Functions
void	Dispose ()
void	SetSamplingInterval (int us)
void	StartProfiling (Local< String > title, CpuProfilingMode mode, bool record_samples=false)
void	StartProfiling (Local< String > title, bool record_samples=false)
CpuProfile *	StopProfiling (Local< String > title)
	V8_DEPRECATED ("Use static CollectSample(Isolate*) instead.", void CollectSample())
	V8_DEPRECATED ("Use Isolate::SetIdle(bool) instead.", void SetIdle(bool is_idle))

Static Public Member Functions
static CpuProfiler *	New (Isolate *isolate)
static void	CollectSample (Isolate *isolate)
static void	UseDetailedSourcePositionsForProfiling (Isolate *isolate)

Detailed Description

Interface for controlling CPU profiling. Instance of the profiler can be created using v8::CpuProfiler::New method.

Definition at line 276 of file v8-profiler.h.

Member Function Documentation

CollectSample()

static void CollectSample ( Isolate *  isolate )

static

Synchronously collect current stack sample in all profilers attached to the |isolate|. The call does not affect number of ticks recorded for the current top node.

Dispose()

void Dispose

(

)

Disposes the CPU profiler object.

New()

static CpuProfiler* New ( Isolate *  isolate )

static

Creates a new CPU profiler for the |isolate|. The isolate must be initialized. The profiler object must be disposed after use by calling |Dispose| method.

SetSamplingInterval()

void SetSamplingInterval

(

int

us

)

Changes default CPU profiler sampling interval to the specified number of microseconds. Default interval is 1000us. This method must be called when there are no profiles being recorded.

StartProfiling() [1/2]

void StartProfiling	(	Local< String >	title,
		CpuProfilingMode	mode,
		bool	record_samples = false
	)

Starts collecting CPU profile. Title may be an empty string. It is allowed to have several profiles being collected at once. Attempts to start collecting several profiles with the same title are silently ignored. While collecting a profile, functions from all security contexts are included in it. The token-based filtering is only performed when querying for a profile.

|record_samples| parameter controls whether individual samples should be recorded in addition to the aggregated tree.

StartProfiling() [2/2]

void StartProfiling	(	Local< String >	title,
		bool	record_samples = false
	)

The same as StartProfiling above, but the CpuProfilingMode defaults to kLeafNodeLineNumbers mode, which was the previous default behavior of the profiler.

StopProfiling()

CpuProfile* StopProfiling

(

Local< String >

title

)

Stops collecting CPU profile with a given title and returns it. If the title given is empty, finishes the last profile started.

UseDetailedSourcePositionsForProfiling()

static void UseDetailedSourcePositionsForProfiling ( Isolate *  isolate )

static

Generate more detailed source positions to code objects. This results in better results when mapping profiling samples to script source.

V8_DEPRECATED() [1/2]

V8_DEPRECATED	(	"Use static CollectSample(Isolate*) instead."	,
		void	CollectSample()
	)

Force collection of a sample. Must be called on the VM thread. Recording the forced sample does not contribute to the aggregated profile statistics.

V8_DEPRECATED() [2/2]

V8_DEPRECATED	(	"Use Isolate::SetIdle(bool) instead."	,
		void	SetIdlebool is_idle
	)

Tells the profiler whether the embedder is idle.

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

• include/v8-profiler.h