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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Web Inspector: Improve handling of Bound functions in samples"
href="https://bugs.webkit.org/show_bug.cgi?id=155916">155916</a>
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<th>Summary</th>
<td>Web Inspector: Improve handling of Bound functions in samples
</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
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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
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<th>Component</th>
<td>Web Inspector
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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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, sbarati@apple.com, timothy@apple.com, webkit-bug-importer@group.apple.com
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<pre>Created <span class=""><a href="attachment.cgi?id=274968" name="attach_274968" title="[IMAGE] Call Tree with "bound" clutter">attachment 274968</a> <a href="attachment.cgi?id=274968&action=edit" title="[IMAGE] Call Tree with "bound" clutter">[details]</a></span>
[IMAGE] Call Tree with "bound" clutter
* SUMMARY
Improve handling of Bound functions in samples.
Currently bound functions show up in the sample twice. The "[N] bound foo" and its immediate call to "[ƒ] foo". Ending up with:
[ƒ] doStuff
[N] bound foo
[ƒ] foo
[N] bound foo
[ƒ] foo
Note we do not show these bound functions in our call stack. If we were paused in the inner foo here we would have a call stack like:
[ƒ] foo
[ƒ] foo
[ƒ] doStuff
So the profile here could be:
[ƒ] doStuff
[ƒ] foo
[ƒ] foo
Or:
[ƒ] doStuff
[ƒ] bound foo
[ƒ] bound foo
Removing a bunch of extra, unnecessary duplication in the call tree.
* TEST
<script>
setInterval(function() { // anonymous
(function foo() { // bound foo => foo
var until = Date.now() + 2;
while (Date.now() <= until);
console.log(Date.now());
}).bind(null)()
}, 1000);
</script></pre>
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