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Introduce a new non-heap-allocated type for holding nsStringBuffer* in the HTML parser.

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An innerHTML setter profile shows about 10% of the time being spent under nsHtml5HtmlAttributes::clear, mostly deleting nsStrings.
This commit is contained in:
win7-7 2019-07-05 21:58:21 +03:00 • committed by Roy Tam
commit 1be77e0f3f
34 changed files with 719 additions and 358 deletions
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49
parser/html/nsHtml5TreeBuilder.cpp
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@ -34,7 +34,7 @@
#include "nsIAtom.h"
#include "nsHtml5AtomTable.h"
#include "nsITimer.h"
#include "nsString.h"
#include "nsHtml5String.h"
#include "nsNameSpaceManager.h"
#include "nsIContent.h"
#include "nsTraceRefcnt.h"
@ -154,13 +154,16 @@ nsHtml5TreeBuilder::startTokenization(nsHtml5Tokenizer* self)
}
void
nsHtml5TreeBuilder::doctype(nsIAtom* name, nsString* publicIdentifier, nsString* systemIdentifier, bool forceQuirks)
nsHtml5TreeBuilder::doctype(nsIAtom* name,
nsHtml5String publicIdentifier,
nsHtml5String systemIdentifier,
bool forceQuirks)
{
needToDropLF = false;
if (!isInForeign() && mode == NS_HTML5TREE_BUILDER_INITIAL) {
nsString* emptyString = nsHtml5Portability::newEmptyString();
nsHtml5String emptyString = nsHtml5Portability::newEmptyString();
appendDoctypeToDocument(!name ? nsHtml5Atoms::emptystring : name, !publicIdentifier ? emptyString : publicIdentifier, !systemIdentifier ? emptyString : systemIdentifier);
nsHtml5Portability::releaseString(emptyString);
emptyString.Release();
if (isQuirky(name, publicIdentifier, systemIdentifier, forceQuirks)) {
errQuirkyDoctype();
documentModeInternal(QUIRKS_MODE, publicIdentifier, systemIdentifier, false);
@ -1990,8 +1993,9 @@ nsHtml5TreeBuilder::isSpecialParentInForeign(nsHtml5StackNode* stackNode)
return (kNameSpaceID_XHTML == ns) || (stackNode->isHtmlIntegrationPoint()) || ((kNameSpaceID_MathML == ns) && (stackNode->getGroup() == NS_HTML5TREE_BUILDER_MI_MO_MN_MS_MTEXT));
}
nsString*
nsHtml5TreeBuilder::extractCharsetFromContent(nsString* attributeValue, nsHtml5TreeBuilder* tb)
nsHtml5String
nsHtml5TreeBuilder::extractCharsetFromContent(nsHtml5String attributeValue,
nsHtml5TreeBuilder* tb)
{
int32_t charsetState = NS_HTML5TREE_BUILDER_CHARSET_INITIAL;
int32_t start = -1;
@ -2175,12 +2179,13 @@ nsHtml5TreeBuilder::extractCharsetFromContent(nsString* attributeValue, nsHtml5T
}
}
charsetloop_end: ;
nsString* charset = nullptr;
nsHtml5String charset = nullptr;
if (start != -1) {
if (end == -1) {
end = buffer.length;
}
charset = nsHtml5Portability::newStringFromBuffer(buffer, start, end - start, tb);
charset =
nsHtml5Portability::newStringFromBuffer(buffer, start, end - start, tb);
}
return charset;
}
@ -2188,7 +2193,8 @@ nsHtml5TreeBuilder::extractCharsetFromContent(nsString* attributeValue, nsHtml5T
void
nsHtml5TreeBuilder::checkMetaCharset(nsHtml5HtmlAttributes* attributes)
{
nsString* charset = attributes->getValue(nsHtml5AttributeName::ATTR_CHARSET);
nsHtml5String charset =
attributes->getValue(nsHtml5AttributeName::ATTR_CHARSET);
if (charset) {
if (tokenizer->internalEncodingDeclaration(charset)) {
requestSuspension();
@ -2199,15 +2205,17 @@ nsHtml5TreeBuilder::checkMetaCharset(nsHtml5HtmlAttributes* attributes)
if (!nsHtml5Portability::lowerCaseLiteralEqualsIgnoreAsciiCaseString("content-type", attributes->getValue(nsHtml5AttributeName::ATTR_HTTP_EQUIV))) {
return;
}
nsString* content = attributes->getValue(nsHtml5AttributeName::ATTR_CONTENT);
nsHtml5String content =
attributes->getValue(nsHtml5AttributeName::ATTR_CONTENT);
if (content) {
nsString* extract = nsHtml5TreeBuilder::extractCharsetFromContent(content, this);
nsHtml5String extract =
nsHtml5TreeBuilder::extractCharsetFromContent(content, this);
if (extract) {
if (tokenizer->internalEncodingDeclaration(extract)) {
requestSuspension();
}
}
nsHtml5Portability::releaseString(extract);
extract.Release();
}
}
@ -3208,7 +3216,11 @@ nsHtml5TreeBuilder::isSecondOnStackBody()
}
void
nsHtml5TreeBuilder::documentModeInternal(nsHtml5DocumentMode m, nsString* publicIdentifier, nsString* systemIdentifier, bool html4SpecificAdditionalErrorChecks)
nsHtml5TreeBuilder::documentModeInternal(
nsHtml5DocumentMode m,
nsHtml5String publicIdentifier,
nsHtml5String systemIdentifier,
bool html4SpecificAdditionalErrorChecks)
{
if (isSrcdocDocument) {
quirks = false;
@ -3220,7 +3232,8 @@ nsHtml5TreeBuilder::documentModeInternal(nsHtml5DocumentMode m, nsString* public
}
bool
nsHtml5TreeBuilder::isAlmostStandards(nsString* publicIdentifier, nsString* systemIdentifier)
nsHtml5TreeBuilder::isAlmostStandards(nsHtml5String publicIdentifier,
nsHtml5String systemIdentifier)
{
if (nsHtml5Portability::lowerCaseLiteralEqualsIgnoreAsciiCaseString("-//w3c//dtd xhtml 1.0 transitional//en", publicIdentifier)) {
return true;
@ -3240,7 +3253,10 @@ nsHtml5TreeBuilder::isAlmostStandards(nsString* publicIdentifier, nsString* syst
}
bool
nsHtml5TreeBuilder::isQuirky(nsIAtom* name, nsString* publicIdentifier, nsString* systemIdentifier, bool forceQuirks)
nsHtml5TreeBuilder::isQuirky(nsIAtom* name,
nsHtml5String publicIdentifier,
nsHtml5String systemIdentifier,
bool forceQuirks)
{
if (forceQuirks) {
return true;
@ -4051,7 +4067,8 @@ nsHtml5TreeBuilder::appendToCurrentNodeAndPushElementMayFosterMathML(nsHtml5Elem
bool
nsHtml5TreeBuilder::annotationXmlEncodingPermitsHtml(nsHtml5HtmlAttributes* attributes)
{
nsString* encoding = attributes->getValue(nsHtml5AttributeName::ATTR_ENCODING);
nsHtml5String encoding =
attributes->getValue(nsHtml5AttributeName::ATTR_ENCODING);
if (!encoding) {
return false;
}