void UseCounter::updateMeasurements()
{
blink::Platform::current()->histogramEnumeration("WebCore.FeatureObserver", PageVisits, NumberOfFeatures);
if (m_countBits) {
for (unsigned i = 0; i < NumberOfFeatures; ++i) {
if (m_countBits->quickGet(i))
blink::Platform::current()->histogramEnumeration("WebCore.FeatureObserver", i, NumberOfFeatures);
}
// Clearing count bits is timing sensitive.
m_countBits->clearAll();
}
// FIXME: Sometimes this function is called more than once per page. The following
// bool guards against incrementing the page count when there are no CSS
// bits set. http://crbug.com/236262.
bool needsPagesMeasuredUpdate = false;
for (int i = firstCSSProperty; i <= lastCSSProperty; ++i) {
if (m_CSSFeatureBits.quickGet(i)) {
int cssSampleId = mapCSSPropertyIdToCSSSampleIdForHistogram(i);
blink::Platform::current()->histogramEnumeration("WebCore.FeatureObserver.CSSProperties", cssSampleId, maximumCSSSampleId());
needsPagesMeasuredUpdate = true;
}
}
if (needsPagesMeasuredUpdate)
blink::Platform::current()->histogramEnumeration("WebCore.FeatureObserver.CSSProperties", totalPagesMeasuredCSSSampleId(), maximumCSSSampleId());
m_CSSFeatureBits.clearAll();
}
void UseCounter::updateMeasurements()
{
featureObserverHistogram().count(PageVisits);
m_countBits.updateMeasurements();
// FIXME: Sometimes this function is called more than once per page. The following
// bool guards against incrementing the page count when there are no CSS
// bits set. https://crbug.com/236262.
DEFINE_STATIC_LOCAL(EnumerationHistogram, cssPropertiesHistogram, ("WebCore.FeatureObserver.CSSProperties", maximumCSSSampleId()));
bool needsPagesMeasuredUpdate = false;
for (int i = firstCSSProperty; i <= lastUnresolvedCSSProperty; ++i) {
if (m_CSSFeatureBits.quickGet(i)) {
int cssSampleId = mapCSSPropertyIdToCSSSampleIdForHistogram(i);
cssPropertiesHistogram.count(cssSampleId);
needsPagesMeasuredUpdate = true;
}
}
if (needsPagesMeasuredUpdate)
cssPropertiesHistogram.count(totalPagesMeasuredCSSSampleId());
m_CSSFeatureBits.clearAll();
}
