40 lines
1.5 KiB
Markdown
40 lines
1.5 KiB
Markdown
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# Perfetto UI
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[Perfetto UI](https://ui.perfetto.dev) enables you to view and analyze traces in
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the browser. It supports several different tracing formats, including the
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perfetto proto trace format and the legacy json trace format.
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## UI Tips and Tricks
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### Pivot Tables
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To use pivot tables in the Perfetto UI, you will need to enable the
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"Pivot tables" feature flag in the "Flags" tab under "Support" in the Sidebar.
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You can pop up a pivot table over the entire trace when clicking "p" on your
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keyboard. The "Edit" button opens a pop up window to add/remove and reorder
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columns and change the default sorting of aggregations.
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Clicking on "Query" generates a table with the selected columns.
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Table cells with the expand icon can be expanded to show the next column values.
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The "name (stack)" column displays top level slices that can be expanded to show
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their descendants down to the last child.
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Area selection pops up a pre-filled pivot table restricted over the selected
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timestamps and track ids.
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### Disabling metrics
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Some metrics execute at trace load time to annotate the trace with
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additional tracks and events. You can stop these metrics from
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running by disabling them in the 'Flags' page:
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