Class ImageRefProfiler

ImageRef memory profiler.

*

ImageRefs are reference-counted. If references aren't correctly released for whatever reason, the image memory will leak. Leaking memory over time may cause out-of-memory crashes and must be avoided. The profiler can return basic and detailed information about all currently alive ImageRefs, that can be useful to track leaking ImageRefs or to confirm that there are no leaks.

Index

Constructors

Methods

diff enableDetailedProfiling makeSnapshot

Constructors

constructor

new ImageRefProfiler(): ImageRefProfiler
Returns ImageRefProfiler

Methods

`Static` diff

diff(firstSnapshot, secondSnapshot): Promise<ImageRefPoolSnapshotsDiff>
Computes difference between two snapshots. To confirm that a particular operation doesn't leak, take a snapshot before and after the operation, and check that the diff doesn't contain any unexpected new ImageRefs.
Parameters
- firstSnapshot: ImageRefPoolSnapshot
  Snapshot that was taken earlier
- secondSnapshot: ImageRefPoolSnapshot
  Snapshot that was taken later
Returns Promise<ImageRefPoolSnapshotsDiff>
Difference between two snapshots

`Static` enableDetailedProfiling

enableDetailedProfiling(): Promise<void>
After the function is called, ImageRefs will store additional information, such as source from which they were created. This information may be important when trying to understand a profile. This function must be called BEFORE the first ImageRef is created, otherwise details may be lost.

Returns Promise<void>

`Static` makeSnapshot

makeSnapshot(): Promise<ImageRefPoolSnapshot>
Returns a snapshot of all alive ImageRefs. The snapshot contains a list of ImageRefs with information such as in-memory size. If detailed profiling is enabled (by calling enableDetailedProfiling beforehand), the profile will contain additional information such as the source from which each ImageRef has been created.

Returns Promise<ImageRefPoolSnapshot>
The snapshot of all alive ImageRefs.