jmarantz commented on a change in pull request #1802: Prefer Paint Timing API over chrome.loadTimes() URL: https://github.com/apache/incubator-pagespeed-mod/pull/1802#discussion_r225511479
########## File path: net/instaweb/rewriter/add_instrumentation.js ########## @@ -88,21 +88,30 @@ pagespeed.AddInstrumentation.prototype.sendBeacon = function() { timingApi['responseEnd'] - timingApi['responseStart']); url += '&dom_c=' + (timingApi['domContentLoadedEventStart'] - navStartTime); - if (window['performance']['navigation']) { - url += '&nt=' + window['performance']['navigation']['type']; + if (winPerf['navigation']) { + url += '&nt=' + winPerf['navigation']['type']; } var firstPaintTime = -1; + var paintEntries, loadTimes; if (timingApi['msFirstPaint']) { // IE. firstPaintTime = timingApi['msFirstPaint']; - } else if (window['chrome'] && window['chrome']['loadTimes']) { + } else if (winPerf['timeOrigin'] && + winPerf['getEntriesByType'] && + (paintEntries = winPerf['getEntriesByType']('paint')).length > 0) { + // Paint Timing API + // Note that getEntriesByType('paint') is sorted chronologically + firstPaintTime = Math.round( Review comment: can you move the var declaration for firstPaintTime outside the if-block so it's obvious that scopes to all the branches? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services