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196 lines (172 loc) · 4.65 KB
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/* 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 = () =>
void 0;
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.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 benchmarkScan(bench, opts) {
const rep = await makeRep();
bench.name = `scan ${valSize}x${opts.numKeys}`;
bench.size = 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 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(null);
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 start = Date.now();
for (let i = 0; i < minRuns || Date.now() - start < 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;
},
},
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 => 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;
}
2FC0
// @ts-ignore
window.nextTest = nextTest;
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