Repository navigation
Expand file tree
/
Copy pathbench.js
More file actions
212 lines (185 loc) · 5.18 KB
/
Copy pathbench.js
File metadata and controls
212 lines (185 loc) · 5.18 KB
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
function noop() {}
if (typeof console === "undefined") {
console = {};
}
if (!console.time) {
console.time = console.timeEnd = noop;
}
if (!console.profile) {
console.profile = console.profileEnd = noop;
}
// Ensure that benchmarks don't get optimized away by calling this blackbox
// function in your benchmark's action.
var __benchmarkResults = [];
var benchmarkBlackbox = [].push.bind(__benchmarkResults);
const now =
typeof window === "object" && window.performance && window.performance.now
? () => window.performance.now()
: () => now();
const yieldForTick =
typeof setTimeout === "function" ? () => new Promise(resolve => setTimeout(resolve, 1)) : () => Promise.resolve();
// Benchmark running an action n times.
async function benchmark(setup, action, tearDown = () => {}) {
__benchmarkResults = [];
console.time("setup");
await setup();
console.timeEnd("setup");
// Warm up the JIT.
console.time("warmup");
for (let i = 0; i < WARM_UP_ITERATIONS; i++) {
await action();
await yieldForTick();
}
console.timeEnd("warmup");
const stats = new Stats("ms");
for (let i = 0; i < BENCH_ITERATIONS; i++) {
console.time("iteration");
const thisIterationStart = now();
await action();
stats.take(now() - thisIterationStart);
console.timeEnd("iteration");
await yieldForTick();
}
await tearDown();
return stats;
}
async function getTestMapping() {
let smc = await new sourceMap.SourceMapConsumer(testSourceMap);
let mappings = [];
smc.eachMapping([].push, mappings, sourceMap.SourceMapConsumer.ORIGINAL_ORDER);
let testMapping = mappings[Math.floor(mappings.length / 13)];
smc.destroy();
return testMapping;
}
var benchmarks = {
"SourceMapGenerator#toString": () => {
let smg;
return benchmark(
async function() {
var smc = await new sourceMap.SourceMapConsumer(testSourceMap);
smg = sourceMap.SourceMapGenerator.fromSourceMap(smc);
smc.destroy();
},
() => {
benchmarkBlackbox(smg.toString().length);
}
);
},
"set.first.breakpoint": () => {
let testMapping;
return benchmark(
async function() {
testMapping = await getTestMapping();
},
async function() {
let smc = await new sourceMap.SourceMapConsumer(testSourceMap);
benchmarkBlackbox(
smc.allGeneratedPositionsFor({
source: testMapping.source,
line: testMapping.originalLine
}).length
);
smc.destroy();
}
);
},
"first.pause.at.exception": () => {
let testMapping;
return benchmark(
async function() {
testMapping = await getTestMapping();
},
async function() {
let smc = await new sourceMap.SourceMapConsumer(testSourceMap);
benchmarkBlackbox(
smc.originalPositionFor({
line: testMapping.generatedLine,
column: testMapping.generatedColumn
})
);
smc.destroy();
}
);
},
"subsequent.setting.breakpoints": () => {
let testMapping;
let smc;
return benchmark(
async function() {
testMapping = await getTestMapping();
smc = await new sourceMap.SourceMapConsumer(testSourceMap);
},
async function() {
benchmarkBlackbox(
smc.allGeneratedPositionsFor({
source: testMapping.source,
line: testMapping.originalLine
})
);
},
function() {
smc.destroy();
}
);
},
"subsequent.pausing.at.exceptions": () => {
let testMapping;
let smc;
return benchmark(
async function() {
testMapping = await getTestMapping();
smc = await new sourceMap.SourceMapConsumer(testSourceMap);
},
async function() {
benchmarkBlackbox(
smc.originalPositionFor({
line: testMapping.generatedLine,
column: testMapping.generatedColumn
})
);
},
function() {
smc.destroy();
}
);
},
"parse.and.iterate": () => {
return benchmark(noop, async function() {
const smc = await new sourceMap.SourceMapConsumer(testSourceMap);
let maxLine = 0;
let maxCol = 0;
smc.eachMapping(m => {
maxLine = Math.max(maxLine, m.generatedLine);
maxLine = Math.max(maxLine, m.originalLine);
maxCol = Math.max(maxCol, m.generatedColumn);
maxCol = Math.max(maxCol, m.originalColumn);
});
benchmarkBlackbox(maxLine);
benchmarkBlackbox(maxCol);
smc.destroy();
});
},
"iterate.already.parsed": () => {
let smc;
return benchmark(
async function() {
smc = await new sourceMap.SourceMapConsumer(testSourceMap);
},
async function() {
let maxLine = 0;
let maxCol = 0;
smc.eachMapping(m => {
maxLine = Math.max(maxLine, m.generatedLine);
maxLine = Math.max(maxLine, m.originalLine);
maxCol = Math.max(maxCol, m.generatedColumn);
maxCol = Math.max(maxCol, m.originalColumn);
});
benchmarkBlackbox(maxLine);
benchmarkBlackbox(maxCol);
},
function() {
smc.destroy();
}
);
}
};