The profiler is recording.

The profiler is stopped.

Overhead:

Settings

Interval:

1 ms

Window length:

20 sec

Buffer size:

90 MB

Threads:

GeckoMainCompositorDOM WorkerRenderer

RenderBackendPaintWorkerStyleThreadSocket Thread

StreamTransImgDecoderDNS Resolver

Add custom threads by name:

Features:

Native Stacks

Record native stacks (C++ and Rust). This is not available on all platforms. (Recommended on by default.)

JavaScript

Record JavaScript stack information, and interleave it with native stacks. (Recommended on by default.)

Java

Profile Java code.

Responsiveness

Collect thread responsiveness information. (Recommended on by default.)

Native Leaf Stack

Record the native memory address of the leaf-most stack. This could be useful on platforms that do not support stack walking. (Recommended on by default.)

Screenshots

Capture screenshots of browser windows.

Main Thread IO

Record main thread I/O markers.

Memory

Add memory measurements to the samples, this includes resident set size (RSS) and unique set size (USS).

Privacy

Remove some potentially user-identifiable information.

Sequential Styling

Disable parallel traversal in styling.

JIT Optimizations

Track JIT optimizations in the JS engine.

TaskTracer

Enable TaskTracer (Experimental, requires custom build.)

JSTracer

Trace JS engine (Experimental, requires custom build.)