Repository navigation
Expand file tree
/
Copy pathperf.js
More file actions
160 lines (141 loc) · 3.81 KB
/
Copy pathperf.js
File metadata and controls
160 lines (141 loc) · 3.81 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
/* eslint-disable @typescript-eslint/ban-ts-comment */
// @ts-check
/* eslint-env browser, es2020 */
import Replicache from '../out/mod.js';
console.assert = console.debug = console.error = console.info = console.log = console.warn = () => {};
const valSize = 1024;
function randomString(len) {
var arr = new Uint8Array(len);
crypto.getRandomValues(arr);
return new TextDecoder('ascii').decode(arr);
}
function makeRandomStrings(length) {
return Array.from({length}, () => randomString(valSize));
}
/**
* @param {string} name
*/
function deleteDatabase(name) {
return new Promise((resolve, reject) => {
const req = indexedDB.deleteDatabase(name);
req.>
req. = req.>
});
}
let counter = 0;
async function makeRep() {
const name = `bench${counter++}`;
await deleteDatabase(name);
return new Replicache({
diffServerURL: '',
name,
syncInterval: null,
});
}
/**
* @param {Replicache} rep
*/
async function populate(rep, {numKeys}, randomStrings) {
const set = rep.register('populate', async tx => {
for (let i = 0; i < numKeys; i++) {
await tx.put(`key${i}`, randomStrings[i]);
}
});
await set({});
}
async function benchmarkPopulate(bench, opts) {
const rep = await makeRep();
if (!opts.clean) {
await populate(rep, opts, makeRandomStrings(opts.numKeys));
}
for (let i = 0; i < opts.indexes || 0; i++) {
const createIndex = rep.register('createIndex', async tx => {
await tx.createIndex({
name: `idx${i}`,
jsonPointer: '',
});
});
await createIndex(null);
}
const randomStrings = makeRandomStrings(opts.numKeys);
bench.reset();
bench.setName(
`populate ${valSize}x${opts.numKeys} (${
opts.clean ? 'clean' : 'dirty'
}, ${`indexes: ${opts.indexes || 0}`})`,
);
bench.setSize(opts.numKeys * valSize);
await populate(rep, opts, randomStrings);
bench.stop();
await rep.close();
}
async function benchmarkScan(bench, opts) {
const rep = await makeRep();
bench.setName(`scan ${valSize}x${opts.numKeys}`);
bench.setSize(opts.numKeys * valSize);
await populate(rep, opts, makeRandomStrings(opts.numKeys));
bench.reset();
await rep.query(async tx => {
let count = 0;
for await (const value of tx.scan()) {
// use the value to be confident we're not optimizing away.
// @ts-ignore
count += value.length;
}
console.log(count);
});
bench.stop();
await rep.close();
}
async function benchmark(fn) {
const runs = 5;
const times = [];
let sum = 0;
let name = String(fn);
let size = 0;
for (let i = 0; i < runs; i++) {
let t0 = Date.now();
let t1 = 0;
await fn({
reset: () => {
t0 = Date.now();
},
setName: n => (name = n),
setSize: s => (size = s),
stop: () => {
t1 = Date.now();
},
});
if (t1 == 0) {
t1 = Date.now();
}
const dur = t1 - t0;
times.push(dur);
sum += dur;
}
console.log(sum);
times.sort();
const median = times[Math.floor(runs / 2)];
const value = toMB((size / median) * 1000) + '/s';
return {name, value, median};
}
const benchmarks = [
bench => benchmarkPopulate(bench, {numKeys: 1000, clean: true}),
bench => benchmarkPopulate(bench, {numKeys: 1000, clean: false}),
bench => benchmarkPopulate(bench, {numKeys: 1000, clean: true, indexes: 1}),
bench => benchmarkPopulate(bench, {numKeys: 1000, clean: true, indexes: 2}),
bench => benchmarkScan(bench, {numKeys: 1000}),
bench => benchmarkScan(bench, {numKeys: 5000}),
];
function toMB(bytes) {
return (bytes / 2 ** 20).toFixed(2) + ' MB';
}
let current = 0;
async function nextTest() {
if (current < benchmarks.length) {
return await benchmark(benchmarks[current++]);
}
return null;
}
// @ts-ignore
window.nextTest = nextTest;
You can’t perform that action at this time.