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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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15
parser/html/nsHtml5MetaScanner.cpp
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@ -30,7 +30,7 @@
#include "nsIAtom.h"
#include "nsHtml5AtomTable.h"
#include "nsString.h"
#include "nsHtml5String.h"
#include "nsNameSpaceManager.h"
#include "nsIContent.h"
#include "nsTraceRefcnt.h"
@ -86,8 +86,8 @@ nsHtml5MetaScanner::nsHtml5MetaScanner(nsHtml5TreeBuilder* tb)
nsHtml5MetaScanner::~nsHtml5MetaScanner()
{
MOZ_COUNT_DTOR(nsHtml5MetaScanner);
nsHtml5Portability::releaseString(content);
nsHtml5Portability::releaseString(charset);
content.Release();
charset.Release();
}
void
@ -771,9 +771,9 @@ bool
nsHtml5MetaScanner::handleTag()
{
bool stop = handleTagInner();
nsHtml5Portability::releaseString(content);
content.Release();
content = nullptr;
nsHtml5Portability::releaseString(charset);
charset.Release();
charset = nullptr;
httpEquivState = NS_HTML5META_SCANNER_HTTP_EQUIV_NOT_SEEN;
return stop;
@ -786,12 +786,13 @@ nsHtml5MetaScanner::handleTagInner()
return true;
}
if (!!content && httpEquivState == NS_HTML5META_SCANNER_HTTP_EQUIV_CONTENT_TYPE) {
nsString* extract = nsHtml5TreeBuilder::extractCharsetFromContent(content, treeBuilder);
nsHtml5String extract =
nsHtml5TreeBuilder::extractCharsetFromContent(content, treeBuilder);
if (!extract) {
return false;
}
bool success = tryCharset(extract);
nsHtml5Portability::releaseString(extract);
extract.Release();
return success;
}
return false;