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Diffstat (limited to 'thirdparty/systemjs/lib/perf.js')
| -rw-r--r-- | thirdparty/systemjs/lib/perf.js | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/thirdparty/systemjs/lib/perf.js b/thirdparty/systemjs/lib/perf.js deleted file mode 100644 index 9f0a02fbc..000000000 --- a/thirdparty/systemjs/lib/perf.js +++ /dev/null @@ -1,227 +0,0 @@ -/* - * SystemJS performance measurement addon - * - */ -(function() { -function perfEvent(eventName, eventItem) { - var evt = new ProfileEvent(eventName, eventItem); - events.push(evt); - return evt; -}; - -// we extend the hook function itself to create performance instrumentation per extension -var curHook = hook; - -var resolverHooks = ['import', 'normalizeSync', 'decanonicalize', 'normalize']; -var pipelineHooks = ['locate', 'fetch', 'translate', 'instantiate']; -hook = function(name, newHook) { - // hook information - var resolver = resolverHooks.indexOf(name) != -1; - var pipeline = pipelineHooks.indexOf(name) != -1; - var hookEvtName = name + ':' + newHook.toString().substr(0, 200); - - curHook(name, function(prevHook) { - return function() { - // this is called when the hook runs - var hookItem = resolver ? arguments[0] + ' : ' + arguments[1] + ' : ' + !!arguments[2] : arguments[0] && arguments[0].name; - var evt = perfEvent(hookEvtName, hookItem); - - // ignore time spent in the old hook - var fn = newHook(function() { - evt.pause(); - var output = prevHook.apply(this, arguments); - - if (output && output.toString && output.toString() == '[object Promise]') { - return Promise.resolve(output) - .then(function(output) { - evt.resume(); - return output; - }) - .catch(function(err) { - evt.resume() - throw err; - }); - } - else { - evt.resume(); - return output; - } - }); - - var output; - try { - output = fn.apply(this, arguments); - } - catch(e) { - evt.cancel(); - throw e; - } - - if (output && output.toString && output.toString() == '[object Promise]') { - return Promise.resolve(output) - .then(function(output) { - evt.done(); - return output; - }) - .catch(function(err) { - evt.cancel(); - throw err; - }); - } - else { - evt.done(); - return output; - } - }; - }); -}; - -// profiling events -var events = []; - -var perf = typeof performance != 'undefined' : performance : Date; - -// Performance Event class -function ProfileEvent(name, item) { - this.name = name; - this.item = (typeof item == 'function' ? item() : item) || 'default'; - this.start = perf.now(); - this.stop = null; - this.pauseTime = null; - this.cancelled = false; -} -ProfileEvent.prototype.rename = function(name, item) { - this.name = name; - if (arguments.length > 1) - this.item = item; -}; -ProfileEvent.prototype.done = function() { - if (this.stop) - throw new TypeError('Event ' + this.name + ' (' + this.item + ') has already completed.'); - this.stop = perf.now(); -}; -ProfileEvent.prototype.cancel = function() { - this.cancelled = true; -}; -ProfileEvent.prototype.cancelIfNotDone = function() { - if (!this.stop) - this.cancelled = true; -}; -ProfileEvent.prototype.pause = function() { - if (this.stop) - throw new TypeError('Event ' + this.name + ' (' + this.item + ') cannot be paused as it has finished.'); - if (!this.pauseTime) - this.pauseTime = perf.now(); -}; -ProfileEvent.prototype.resume = function() { - if (!this.pauseTime) - throw new TypeError('Event ' + this.name + ' (' + this.item + ') is not already paused.'); - this.start += perf.now() - this.pauseTime; - this.pauseTime = null; -}; - -var logged = false; -SystemJSLoader.prototype.perfSummary = function(includeEvts) { - logged = true; - // create groupings of events by event name to time data - // filtering out cancelled events - var groupedEvents = {}; - events.forEach(function(evt) { - if (includeEvts && !includeEvts(evt)) - return; - if (evt.cancelled) - return; - if (!evt.stop) { - console.warn('Event ' + evt.name + ' (' + evt.item + ') never completed.'); - return; - } - - var evtTimes = groupedEvents[evt.name] = groupedEvents[evt.name] || []; - evtTimes.push({ - time: evt.stop - evt.start, - item: evt.item - }); - }); - - Object.keys(groupedEvents).forEach(function(evt) { - var evtTimes = groupedEvents[evt]; - - // only one event -> log as a single event - if (evtTimes.length == 1) { - console.log(toTitleCase(evt) + (evtTimes[0].item != 'default' ? ' (' + evtTimes[0].item + ')' : '')); - logStat('Total Time', evtTimes[0].time); - console.log(''); - return; - } - - // multiple events, give some stats! - var evtCount = evtTimes.length; - - console.log(toTitleCase(evt) + ' (' + evtCount + ' events)'); - - var totalTime = evtTimes.reduce(function(curSum, evt) { - return curSum + evt.time; - }, 0); - logStat('Cumulative Time', totalTime); - - var mean = totalTime / evtCount; - logStat('Mean', mean); - - var stdDev = Math.sqrt(evtTimes.reduce(function(curSum, evt) { - return curSum + Math.pow(evt.time - mean, 2); - }, 0) / evtCount); - - logStat('Std Deviation', stdDev); - - var withoutOutliers = evtTimes.filter(function(evt) { - return evt.time > mean - stdDev && evt.time < mean + stdDev; - }); - - logStat('Avg within 2σ', withoutOutliers.reduce(function(curSum, evt) { - return curSum + evt.time; - }, 0) / withoutOutliers.length); - - var sorted = evtTimes.sort(function(a, b) { - return a.time > b.time ? 1 : -1; - }); - - var medianIndex = Math.round(evtCount / 2); - logStat('Median', sorted[medianIndex].time, sorted[medianIndex].evt); - - logStat('Max', sorted[evtCount - 1].time, sorted[evtCount - 1].item); - - logStat('Min', sorted[0].time, sorted[0].item); - - var duplicates = evtTimes.filter(function(evt) { - return evtTimes.some(function(dup) { - return dup !== evt && dup.name == evt.name && dup.item == evt.item; - }); - }); - - logStat('Duplicate Events', duplicates.length, true); - - logStat('Total Duplicated Time', duplicates.reduce(function(duplicateTime, evt) { - return duplicateTime + evt.time; - }, 0)); - - console.log(''); - }); -}; - -function toTitleCase(title) { - return title.split('-').map(function(part) { - return part[0].toUpperCase() + part.substr(1); - }).join(' '); -} - -var titleLen = 25; -function logStat(title, value, item, isNum) { - if (item === true) { - item = undefined; - isNum = true; - } - var spaces = Array(titleLen - title.length + 1).join(' '); - var value = isNum ? value : Math.round(value * 100) / 100 + 'ms'; - console.log(' ' + title + spaces + ': ' + value + (item ? ' (' + item + ')' : '')); -} -})();
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