97 lines
2.1 KiB
JavaScript
97 lines
2.1 KiB
JavaScript
/**
|
|
* Copyright (c) 2015-present, Facebook, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This source code is licensed under the BSD-style license found in the
|
|
* LICENSE file in the root directory of this source tree. An additional grant
|
|
* of patent rights can be found in the PATENTS file in the same directory.
|
|
*
|
|
* @providesModule PerformanceLogger
|
|
*/
|
|
'use strict';
|
|
|
|
|
|
var performanceNow = require('performanceNow');
|
|
|
|
var timespans = {};
|
|
|
|
/**
|
|
* This is meant to collect and log performance data in production, which means
|
|
* it needs to have minimal overhead.
|
|
*/
|
|
var PerformanceLogger = {
|
|
addTimespan(key, lengthInMs, description) {
|
|
if (timespans[key]) {
|
|
if (__DEV__) {
|
|
console.log(
|
|
'PerformanceLogger: Attempting to add a timespan that already exists'
|
|
);
|
|
}
|
|
return;
|
|
}
|
|
|
|
timespans[key] = {
|
|
description: description,
|
|
totalTime: lengthInMs,
|
|
};
|
|
},
|
|
|
|
startTimespan(key, description) {
|
|
if (timespans[key]) {
|
|
if (__DEV__) {
|
|
console.log(
|
|
'PerformanceLogger: Attempting to start a timespan that already exists'
|
|
);
|
|
}
|
|
return;
|
|
}
|
|
|
|
timespans[key] = {
|
|
description: description,
|
|
startTime: performanceNow(),
|
|
};
|
|
},
|
|
|
|
stopTimespan(key) {
|
|
if (!timespans[key] || !timespans[key].startTime) {
|
|
if (__DEV__) {
|
|
console.log(
|
|
'PerformanceLogger: Attempting to end a timespan that has not started'
|
|
);
|
|
}
|
|
return;
|
|
}
|
|
|
|
timespans[key].endTime = performanceNow();
|
|
timespans[key].totalTime =
|
|
timespans[key].endTime - timespans[key].startTime;
|
|
},
|
|
|
|
clearTimespans() {
|
|
timespans = {};
|
|
},
|
|
|
|
getTimespans() {
|
|
return timespans;
|
|
},
|
|
|
|
logTimespans() {
|
|
for (var key in timespans) {
|
|
console.log(key + ': ' + timespans[key].totalTime + 'ms');
|
|
}
|
|
},
|
|
|
|
addTimespans(newTimespans, labels) {
|
|
for (var i = 0, l = newTimespans.length; i < l; i += 2) {
|
|
var label = labels[i / 2];
|
|
PerformanceLogger.addTimespan(
|
|
label,
|
|
(newTimespans[i + 1] - newTimespans[i]),
|
|
label
|
|
);
|
|
}
|
|
}
|
|
};
|
|
|
|
module.exports = PerformanceLogger;
|