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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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20
dom/mathml/nsMathMLElement.cpp
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@ -9,6 +9,7 @@
#include "base/compiler_specific.h"
#include "mozilla/ArrayUtils.h"
#include "nsGkAtoms.h"
#include "nsITableCellLayout.h" // for MAX_COLSPAN / MAX_ROWSPAN
#include "nsCRT.h"
#include "nsLayoutStylesheetCache.h"
#include "nsRuleData.h"
@ -150,8 +151,9 @@ nsMathMLElement::ParseAttribute(int32_t aNamespaceID,
const nsAString& aValue,
nsAttrValue& aResult)
{
MOZ_ASSERT(IsMathMLElement());
if (aNamespaceID == kNameSpaceID_None) {
if (IsMathMLElement(nsGkAtoms::math) && aAttribute == nsGkAtoms::mode) {
if (mNodeInfo->Equals(nsGkAtoms::math) && aAttribute == nsGkAtoms::mode) {
WarnDeprecated(nsGkAtoms::mode->GetUTF16String(),
nsGkAtoms::display->GetUTF16String(), OwnerDoc());
}
@ -165,6 +167,16 @@ nsMathMLElement::ParseAttribute(int32_t aNamespaceID,
aAttribute == nsGkAtoms::mathbackground_) {
return aResult.ParseColor(aValue);
}
if (mNodeInfo->Equals(nsGkAtoms::mtd_)) {
if (aAttribute == nsGkAtoms::columnspan_) {
aResult.ParseClampedNonNegativeInt(aValue, 1, 1, MAX_COLSPAN);
return true;
}
if (aAttribute == nsGkAtoms::rowspan) {
aResult.ParseClampedNonNegativeInt(aValue, 1, 0, MAX_ROWSPAN);
return true;
}
}
}
return nsMathMLElementBase::ParseAttribute(aNamespaceID, aAttribute,
@ -209,6 +221,8 @@ static Element::MappedAttributeEntry sDirStyles[] = {
bool
nsMathMLElement::IsAttributeMapped(const nsIAtom* aAttribute) const
{
MOZ_ASSERT(IsMathMLElement());
static const MappedAttributeEntry* const mtableMap[] = {
sMtableStyles,
sCommonPresStyles
@ -240,10 +254,10 @@ nsMathMLElement::IsAttributeMapped(const nsIAtom* aAttribute) const
if (IsAnyOfMathMLElements(nsGkAtoms::mstyle_, nsGkAtoms::math))
return FindAttributeDependence(aAttribute, mstyleMap);
if (IsMathMLElement(nsGkAtoms::mtable_))
if (mNodeInfo->Equals(nsGkAtoms::mtable_))
return FindAttributeDependence(aAttribute, mtableMap);
if (IsMathMLElement(nsGkAtoms::mrow_))
if (mNodeInfo->Equals(nsGkAtoms::mrow_))
return FindAttributeDependence(aAttribute, mrowMap);
if (IsAnyOfMathMLElements(nsGkAtoms::maction_,