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Issue #1386 - Devirtualize GetRowSpan/GetColSpan

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It's at ~1.5% on the perf log for the Netflix use case, which seems a bit too much.
This commit is contained in:
win7-7 2020-02-03 20:47:41 +02:00 • committed by Roy Tam
commit a05c6a317b
7 changed files with 41 additions and 64 deletions
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41
layout/mathml/nsMathMLmtableFrame.cpp
View file

@ -1160,47 +1160,6 @@ nsMathMLmtdFrame::Init(nsIContent* aContent,
RemoveStateBits(NS_FRAME_FONT_INFLATION_FLOW_ROOT);
}
int32_t
nsMathMLmtdFrame::GetRowSpan()
{
int32_t rowspan = 1;
// Don't look at the content's rowspan if we're not an mtd or a pseudo cell.
if (mContent->IsMathMLElement(nsGkAtoms::mtd_) &&
!StyleContext()->GetPseudo()) {
nsAutoString value;
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::rowspan, value);
if (!value.IsEmpty()) {
nsresult error;
rowspan = value.ToInteger(&error);
if (NS_FAILED(error) || rowspan < 0)
rowspan = 1;
rowspan = std::min(rowspan, MAX_ROWSPAN);
}
}
return rowspan;
}
int32_t
nsMathMLmtdFrame::GetColSpan()
{
int32_t colspan = 1;
// Don't look at the content's colspan if we're not an mtd or a pseudo cell.
if (mContent->IsMathMLElement(nsGkAtoms::mtd_) &&
!StyleContext()->GetPseudo()) {
nsAutoString value;
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::columnspan_, value);
if (!value.IsEmpty()) {
nsresult error;
colspan = value.ToInteger(&error);
if (NS_FAILED(error) || colspan <= 0 || colspan > MAX_COLSPAN)
colspan = 1;
}
}
return colspan;
}
nsresult
nsMathMLmtdFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,

2
layout/mathml/nsMathMLmtableFrame.h
View file

@ -257,8 +257,6 @@ public:
nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) override;
virtual int32_t GetRowSpan() override;
virtual int32_t GetColSpan() override;
virtual bool IsFrameOfType(uint32_t aFlags) const override
{
return nsTableCellFrame::IsFrameOfType(aFlags & ~(nsIFrame::eMathML));