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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Web Inspector: Switching between Timeline and Resources tab is slow (100ms)"
href="https://bugs.webkit.org/show_bug.cgi?id=153633">153633</a>
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<th>Summary</th>
<td>Web Inspector: Switching between Timeline and Resources tab is slow (100ms)
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>WebKit Nightly Build
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<th>Hardware</th>
<td>All
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Normal
</td>
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<th>Priority</th>
<td>P2
</td>
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<th>Component</th>
<td>Web Inspector
</td>
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
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<th>Reporter</th>
<td>joepeck@webkit.org
</td>
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<th>CC</th>
<td>bburg@apple.com, graouts@webkit.org, joepeck@webkit.org, mattbaker@apple.com, nvasilyev@apple.com, timothy@apple.com, webkit-bug-importer@group.apple.com
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<pre>Created <span class=""><a href="attachment.cgi?id=270174" name="attach_270174" title="[IMAGE] Profile of switching tabs">attachment 270174</a> <a href="attachment.cgi?id=270174&action=edit" title="[IMAGE] Profile of switching tabs">[details]</a></span>
[IMAGE] Profile of switching tabs
* SUMMARY
Switching between Timeline and Resources tab is slow (100ms).
* STEPS
1. Open inspector
2. Resources > Select a resource
3. Show both sidebars
4. Show Timelines Tab
5. Show Resources Tab
=> 100ms switch
* NOTES
- See attached screenshot. We refresh CodeMirror 3 times, each time results a 30ms layout => ~100ms
=> _tabBarItemSelected
=> showDetailsSidebarPanelsForTabContentView
=> ... collapsed changed recalculate width ...
=> dispatchEvent => sidebarWidthDidChange => synchronous layout => CodeMirror refresh
=> showNavigationSidebarPanelsForTabContentView
=> ... changed recalculate width ...
=> dispatchEvent => sidebarWidthDidChange => synchronous layout => CodeMirror refresh
=> showContentView
=> ... TextEditor.shown
=> CodeMirror refresh</pre>
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