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Bug 1209193 - Cache PR_GetNumberOfProcessors when checking to do off-main-thread script compilation. r=luke

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This commit is contained in:
Kannan Vijayan 2015-09-29 10:41:55 -04:00
parent dd395e3023
commit 21840c31cf
2 changed files with 16 additions and 1 deletions
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15
dom/base/nsScriptLoader.cpp
View File

@ -114,6 +114,7 @@ nsScriptLoadRequestList::Contains(nsScriptLoadRequest* aElem)
nsScriptLoader::nsScriptLoader(nsIDocument *aDocument)
: mDocument(aDocument),
mBlockerCount(0),
mNumberOfProcessors(0),
mEnabled(true),
mDeferEnabled(false),
mDocumentParsingDone(false),
@ -1503,6 +1504,18 @@ nsScriptLoader::ContinueParserAsync(nsScriptLoadRequest* aParserBlockingRequest)
aParserBlockingRequest->mElement->ContinueParserAsync();
}
uint32_t
nsScriptLoader::NumberOfProcessors()
{
if (mNumberOfProcessors > 0)
return mNumberOfProcessors;
int32_t numProcs = PR_GetNumberOfProcessors();
if (numProcs > 0)
mNumberOfProcessors = numProcs;
return mNumberOfProcessors;
}
nsresult
nsScriptLoader::PrepareLoadedRequest(nsScriptLoadRequest* aRequest,
nsIStreamLoader* aLoader,
@ -1589,7 +1602,7 @@ nsScriptLoader::PrepareLoadedRequest(nsScriptLoadRequest* aRequest,
aRequest->mProgress = nsScriptLoadRequest::Progress_DoneLoading;
// If this is currently blocking the parser, attempt to compile it off-main-thread.
if (aRequest == mParserBlockingRequest && (PR_GetNumberOfProcessors() > 1)) {
if (aRequest == mParserBlockingRequest && (NumberOfProcessors() > 1)) {
nsresult rv = AttemptAsyncScriptCompile(aRequest);
if (rv == NS_OK) {
NS_ASSERTION(aRequest->mProgress == nsScriptLoadRequest::Progress_Compiling,

2
dom/base/nsScriptLoader.h
View File

@ -487,6 +487,7 @@ private:
JS::Handle<JSObject *> aScopeChain,
JS::CompileOptions *aOptions);
uint32_t NumberOfProcessors();
nsresult PrepareLoadedRequest(nsScriptLoadRequest* aRequest,
nsIStreamLoader* aLoader,
nsresult aStatus,
@ -530,6 +531,7 @@ private:
// XXXbz do we want to cycle-collect these or something? Not sure.
nsTArray< nsRefPtr<nsScriptLoader> > mPendingChildLoaders;
uint32_t mBlockerCount;
uint32_t mNumberOfProcessors;
bool mEnabled;
bool mDeferEnabled;
bool mDocumentParsingDone;