Certain details are present in events of all types, while some only apply to certain event types. This section lists properties common to different event types. Properties specific to certain event types are listed in the references for those event types that follow.
When is it shown
For events with nested events, the time taken by each category of events.
For events with child events, the time taken by each category of events.
How much CPU time the recorded event took.
Other details about the event.
Duration (at time-stamp)
How long it took the event with all of its children to complete; timestamp is the time at which the event occurred, relative to when the recording started.
How long the event took without any of its children.
Used Heap Size
Amount of memory being used by the application when the event was recorded, and the delta (+/-) change in used heap size since the last sampling.
For Layout records, the stack trace of the code that caused the layout to be invalidated.
Nodes that need layout
For Layout records, the number of nodes that were marked as needing layout before the relayout started. These are normally those nodes that were invalidated by developer code, plus a path upward to relayout root.
Layout tree size
For Layout records, the total number of nodes under the relayout root (the node that Chrome starts the relayout).
Possible values are "Partial" (the re-layout boundary is a portion of the DOM) or "Whole document".
For Recalculate style records, the number of elements affected by a style recalculation.
For Recalculate style records, provides the stack trace of the code that caused the style invalidation.