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Optimize elements list filtering to retrieve an element label only once #6126

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@leonardder
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@leonardder leonardder commented Jun 30, 2016

As discussed in this thread on nvda-devel:

What do you think about the following though, related to the elements list? IN browseMode.ElementsListDialog.filter, label is called twice in every for element in self._elements loop, namely:

  • if filterText and filterText not in element.item.label.lower():
  • item = self.tree.AppendItem(parent or self.treeRoot, element.item.label)

I'd like to suggest create a local label variable which contains element.item.label, and than do the returning and filtering with that variable. This will, if I understand it correctly, call element.item.label only once instead of twice, which can improve performance on complex label generation as in virtualBuffers.VirtualBufferQuickNavItem.label.

michaelDCurran added a commit that referenced this pull request Jul 6, 2016
@michaelDCurran michaelDCurran merged commit 1c25da5 into nvaccess:master Jul 24, 2016
@jcsteh jcsteh added this to the 2016.3 milestone Aug 5, 2016
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4 participants