-
Notifications
You must be signed in to change notification settings - Fork 4
/
report-diff.js
216 lines (175 loc) · 5.51 KB
/
report-diff.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
var util = require('util');
var _ = require('lodash');
var async = require('async');
var chalk = require('chalk');
var Duration = require('duration-js');
var table = require('fancy-text-table');
var isStream = require('./is-stream.js');
var report = require('./report.js');
function assertStreams(streams) {
if (!_.every(streams, isStream.readable)) {
throw new TypeError('streams is not an array or has object of readable streams');
}
if (_.keys(streams).length < 2) {
throw new Error('at least two streams are required for a diff');
}
}
function assertEnum(enums, value, name) {
if (!_.includes(enums, value)) {
throw new Error(name + ' must be one of: ' + enums.join(', '));
}
}
function assertOptions(options) {
if (!isStream.writable(options.output)) {
throw new TypeError('options.output is not a writable stream');
}
assertEnum(['fastest'], options.mode, 'options.mode');
assertEnum(['text'], options.type, 'options.type');
}
function duration(val) {
return (new Duration(val)).toString();
}
var stringifier = function(opts) {
function appendTimeUnit(val) {
return (+val).toFixed(3) + 'ms';
}
function statsArr(name, latencies, color) {
return [name].concat([
latencies.mean,
latencies['50'],
latencies['95'],
latencies['99'],
latencies.max
].map(appendTimeUnit)).map(function(s) {
if (opts.color) {
return color(s);
}
return s;
});
}
function percentString(from, to) {
var diff = to - from;
var template = '(%s\%)'; // eslint-disable-line no-useless-escape
var str;
var color;
if (diff < 0) {
str = util.format(template, Math.round(Math.abs(diff) / from * 100, 10));
color = chalk.green;
} else {
str = util.format(template, '-' + Math.round(diff / from * 100));
color = chalk.red;
}
if (opts.color) {
str = color(str);
}
return str;
}
function diffValue(from, to) {
var str = '';
str += appendTimeUnit(to);
str += ' ' + percentString(from, to);
return str;
}
function statsDiffArr(name, from, to) {
return [name].concat([
diffValue(from.mean, to.mean),
diffValue(from['50'], to['50']),
diffValue(from['95'], to['95']),
diffValue(from['99'], to['99']),
diffValue(from.max, to.max)
]);
}
function reportName(name, stats) {
var str = util.format(
'%s: %s, %s, %s, %s total',
name,
stats.info.name,
duration(stats.info.duration),
stats.info.rate ?
stats.info.rate + ' per second' :
stats.info.concurrent + ' concurrent',
stats.info.count
);
if (opts.color) {
str = chalk.magenta(str);
}
return str;
}
function statsColor(colorName) {
return function() {
return statsArr.apply(null, [].slice.call(arguments).concat(colorName));
};
}
return {
statsMainArr: statsColor(chalk.cyan),
statsFadedArr: statsColor(chalk.gray),
statsDiffArr: statsDiffArr,
reportName: reportName
};
};
module.exports = function(streams, options, callback) {
try {
assertStreams(streams);
assertOptions(options);
} catch(e) {
setImmediate(callback, e);
return;
}
var output = options.output;
var stringify = stringifier(options);
// async.mapValues does not preserve order. So we will
// convert both arrays and objects to arrays, so that
// we can use async.map, which does preserve order.
async.map(_.map(streams, function(stream, name) {
return {
stream: stream,
name: name
};
}), function(val, next) {
report({
input: val.stream,
type: 'json'
}, function(err, stat) {
if (err) {
return next(err);
}
stat._statTitle = val.name;
next(null, stat);
});
}, function(err, stats) {
if (err) {
return callback(err);
}
var fastest = _.reduce(stats, function(a, b) {
if (a.latencies.fullTest.mean < b.latencies.fullTest.mean) {
return a;
}
return b;
});
var tableObj = table();
// add latencies header
tableObj.row([
'Latencies:', 'mean', '50', '95', '99', 'max'
]);
_.forEach(stats, function(stat) {
// push an empty line before each summary
tableObj.line();
tableObj.title(stringify.reportName(stat._statTitle, stat));
_.forEach(stat.latencies, function(val, name) {
if (stat === fastest) {
tableObj.row(stringify.statsMainArr(name, val));
} else if (fastest.latencies[name]) {
tableObj.row(stringify.statsDiffArr(name, fastest.latencies[name], val));
} else {
tableObj.row(stringify.statsFadedArr(name, val));
}
});
});
var tableStr = tableObj.render();
output.write(tableStr + '\n');
if (!isStream.stdio(output)) {
output.end();
}
callback();
});
};