Repository navigation
Expand file tree
/
Copy pathperf.js
More file actions
252 lines (223 loc) · 6.12 KB
/
Copy pathperf.js
File metadata and controls
252 lines (223 loc) · 6.12 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
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
/* eslint-disable @typescript-eslint/ban-ts-comment */
// @ts-check
/* eslint-env browser, es2020 */
import Replicache from '../out/replicache.js';
console.assert = console.debug = console.error = console.info = console.log = console.warn = () =>
void 0;
const valSize = 1024;
function randomString(len) {
const arr = new Uint8Array(len);
crypto.getRandomValues(arr);
for (let i = 0; i < len; i++) {
// Don't allow \0 in the string because these values are used as secondary
// keys when building indexes and we do not allow \0 there so it slows down
// the benchmark.
if (arr[i] === 0) {
arr[i] = 1;
}
}
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${counter++}`;
await deleteDatabase(name);
return new Replicache({
diffServerURL: '',
name,
syncInterval: null,
});
}
function makeLastRep() {
const name = `bench${counter - 1}`;
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${i}`, randomStrings[i]);
}
});
await set();
}
async function benchmarkPopulate(bench, opts) {
const rep = await makeRep();
if (!opts.clean) {
await populate(rep, opts, makeRandomStrings(opts.numKeys));
}
for (let i = 0; i < opts.indexes || 0; i++) {
await rep.createIndex({
name: `idx${i}`,
jsonPointer: '',
});
}
const randomStrings = makeRandomStrings(opts.numKeys);
bench.reset();
bench.name = `populate ${valSize}x${opts.numKeys} (${
opts.clean ? 'clean' : 'dirty'
}, ${`indexes: ${opts.indexes || 0}`})`;
bench.size = opts.numKeys * valSize;
await populate(rep, opts, randomStrings);
bench.stop();
await rep.close();
}
async function benchmarkReadTransaction(bench, opts) {
await bench.setup(async () => {
bench.name = `read tx ${valSize}x${opts.numKeys}`;
bench.size = opts.numKeys * valSize;
const rep = await makeRep();
await populate(rep, opts, makeRandomStrings(opts.numKeys));
await rep.close();
});
const rep = makeLastRep();
await populate(rep, opts, makeRandomStrings(opts.numKeys));
bench.reset();
await rep.query(async tx => {
let getCount = 0;
let hasCount = false;
for (let i = 0; i < opts.numKeys; i++) {
// use the values to be confident we're not optimizing away.
// @ts-ignore
getCount += (await tx.get(`key${i}`)).length;
// @ts-ignore
hasCount = (await tx.has(`key${i}`)) === true ? 1 : 0;
}
console.log(getCount, hasCount);
});
bench.stop();
await rep.close();
}
async function benchmarkScan(bench, opts) {
await bench.setup(async () => {
bench.name = `scan ${valSize}x${opts.numKeys}`;
bench.size = opts.numKeys * valSize;
const rep = await makeRep();
await populate(rep, opts, makeRandomStrings(opts.numKeys));
await rep.close();
});
const rep = makeLastRep();
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 benchmarkSingleByteWrite(bench, i) {
const rep = await makeRep();
const write = rep.register('write', tx => tx.put('k', i % 10));
bench.name = 'write single byte';
bench.size = 1;
bench.formatter = formatTxPerSecond;
bench.reset();
await write();
bench.stop();
await rep.close();
}
async function benchmark(fn) {
// Execute fn at least this many runs.
const minRuns = 5;
// Execute fn at least for this long.
const minTime = 2000;
const times = [];
let sum = 0;
let name = String(fn);
let size = 0;
let format = formatToMBPerSecond;
let setupCalled = false;
for (let i = 0; i < minRuns || sum < minTime; i++) {
let t0 = Date.now();
let t1 = 0;
await fn(
{
reset() {
t0 = Date.now();
},
stop() {
t1 = Date.now();
},
set name(n) {
name = n;
},
set size(s) {
size = s;
},
set formatter(f) {
format = f;
},
async setup(f) {
if (!setupCalled) {
await f();
setupCalled = true;
}
},
},
i,
);
if (t1 == 0) {
t1 = Date.now();
}
const dur = t1 - t0;
times.push(dur);
sum += dur;
}
console.log(sum);
times.sort();
const runs = times.length;
const median = times[Math.floor(runs / 2)];
const value = format(size, median);
return {name, value, median, runs};
}
function formatToMBPerSecond(size, timeMS) {
const bytes = (size / timeMS) * 1000;
return (bytes / 2 ** 20).toFixed(2) + ' MB/s';
}
function formatTxPerSecond(size, timeMS) {
return ((size / timeMS) * 1000).toFixed(2) + ' tx/s';
}
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 => benchmarkReadTransaction(bench, {numKeys: 1000}),
bench => benchmarkReadTransaction(bench, {numKeys: 5000}),
bench => benchmarkScan(bench, {numKeys: 1000}),
bench => benchmarkScan(bench, {numKeys: 5000}),
benchmarkSingleByteWrite,
];
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.