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Memory

Experimental

Commands

Memory.getDOMCounters

Retruns current DOM object counters.

Return Object
Name Type Description
documents integer
nodes integer
jsEventListeners integer

Memory.getDOMCountersForLeakDetection

Retruns DOM object counters after preparing renderer for leak detection.

Return Object
Name Type Description
counters array<DOMCounter> DOM object counters.

Memory.prepareForLeakDetection

Prepares for leak detection by terminating workers, stopping spellcheckers,
dropping non-essential internal caches, running garbage collections, etc.

Memory.forciblyPurgeJavaScriptMemory

Simulate OomIntervention by purging V8 memory.

Memory.setPressureNotificationsSuppressed

Enable/disable suppressing memory pressure notifications in all processes.

Parameters
Name Type Description
suppressed boolean If true, memory pressure notifications will be suppressed.

Memory.simulatePressureNotification

Simulate a memory pressure notification in all processes.

Parameters
Name Type Description
level PressureLevel Memory pressure level of the notification.

Memory.startSampling

Start collecting native memory profile.

Parameters
Name Type Description
samplingInterval (optional) integer Average number of bytes between samples.
suppressRandomness (optional) boolean Do not randomize intervals between samples.

Memory.stopSampling

Stop collecting native memory profile.

Memory.getAllTimeSamplingProfile

Retrieve native memory allocations profile
collected since renderer process startup.

Return Object
Name Type Description
profile SamplingProfile

Memory.getBrowserSamplingProfile

Retrieve native memory allocations profile
collected since browser process startup.

Return Object
Name Type Description
profile SamplingProfile

Memory.getSamplingProfile

Retrieve native memory allocations profile collected since last
`startSampling` call.

Return Object
Name Type Description
profile SamplingProfile

Types

PressureLevel

(string)

Memory pressure level.

Allowed Values
  • moderate
  • critical

SamplingProfileNode

(object)

Heap profile sample.

Properties
Name Type Description
size number Size of the sampled allocation.
total number Total bytes attributed to this sample.
stack array<string> Execution stack at the point of allocation.

SamplingProfile

(object)

Array of heap profile samples.

Properties
Name Type Description
samples array<SamplingProfileNode>
modules array<Module>

Module

(object)

Executable module information

Properties
Name Type Description
name string Name of the module.
uuid string UUID of the module.
baseAddress string Base address where the module is loaded into memory. Encoded as a decimal
or hexadecimal (0x prefixed) string.
size number Size of the module in bytes.

DOMCounter

(object)

DOM object counter data.

Properties
Name Type Description
name string Object name. Note: object names should be presumed volatile and clients should not expect
the returned names to be consistent across runs.
count integer Object count.

Summary