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401 lines (359 loc) · 9.27 KB
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/* 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;
/**
* @template R
* @returns {{promise: Promise<R>, resolve: (res: R) => void}}
*/
function resolver() {
let resolve;
const promise = new Promise(res => {
resolve = res;
});
return {promise, resolve};
}
/**
* @param {number} len
*/
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);
}
/**
* @param {number} length
*/
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${counter++}`;
await deleteDatabase(name);
return new Replicache({
name,
syncInterval: null,
});
}
/**
* @param {Replicache} rep
* @param {{numKeys: number}}
* @param {string[]} randomStrings
*/
async function populate(rep, {numKeys}, randomStrings) {
const set = rep.register('populate', async tx => {
for (let i = 0; i < numKeys; i++) {
await tx.put(`key${i}`, randomStrings[i]);
}
});
await set();
}
/**
* @param {Bench} bench
* @param {{numKeys: number; clean: boolean; indexes?: number;}} opts
*/
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();
}
/** @typedef {{
* setup: (body: () => Promise<void> | void) => Promise<void>;
* teardown: () => Promise<void> | void;
* name: string;
* size: number;
* reset: () => void;
* stop: () => void;
* formatter: (size: number, timeMS: number) => string;
* }}
*/
// eslint-disable-next-line @typescript-eslint/no-unused-vars
let Bench;
/** @type {Replicache} */
let rep;
async function benchmarkReadTransaction(bench, opts) {
await bench.setup(async () => {
bench.name = `read tx ${valSize}x${opts.numKeys}`;
bench.size = opts.numKeys * valSize;
rep = await makeRep();
await populate(rep, opts, makeRandomStrings(opts.numKeys));
});
bench.teardown = async () => {
await rep.close();
};
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();
}
/**
* @param {Bench} bench
* @param {{numKeys: number;}} opts
*/
async function benchmarkScan(bench, opts) {
await bench.setup(async () => {
bench.name = `scan ${valSize}x${opts.numKeys}`;
bench.size = opts.numKeys * valSize;
rep = await makeRep();
await populate(rep, opts, makeRandomStrings(opts.numKeys));
});
bench.teardown = async () => {
await rep.close();
};
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();
}
/**
* @param {Bench} bench
* @param {number} i
*/
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();
}
/**
* @param {Bench} bench
* @param {{numKeys: number;}} opts
*/
async function createIndex(bench, opts) {
const rep = await makeRep();
await populate(rep, opts, makeRandomStrings(opts.numKeys));
bench.name = `create index ${valSize}x${opts.numKeys}`;
bench.size = 1;
bench.formatter = formatOpPerSecond;
bench.reset();
await rep.createIndex({
name: `idx`,
jsonPointer: '',
});
bench.stop();
await rep.close();
}
/**
* @param {Bench} bench
* @param {number} i
*/
async function benchmarkWriteReadRoundTrip(bench, i) {
await bench.setup(async () => {
rep = await makeRep();
});
bench.teardown = async () => {
await rep.close();
};
const key = `k${i}`;
const value = i;
let {promise, resolve} = resolver();
const unsubscribe = rep.subscribe(tx => tx.get(key), {
onData(res) {
// `resolve` binding needs to be looked up on every iteration
resolve(res);
},
});
// onData is called once when calling subscribe
await promise;
const write = rep.register('write', tx => tx.put(key, value));
bench.name = 'roundtrip write/subscribe/get';
bench.size = 1;
bench.formatter = formatOpPerSecond;
bench.reset();
// reset these.
({promise, resolve} = resolver());
await write();
const res = await promise;
if (res !== value) {
throw new Error();
}
bench.stop();
unsubscribe();
}
/**
* @param {(bench: Bench, i: number) => void | Promise<void>} fn
*/
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;
/** @type {(() => Promise<void> | void) | undefined} */
let teardown;
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();
},
/**
* @param {string} n
*/
set name(n) {
name = n;
},
/**
* @param {number} s
*/
set size(s) {
size = s;
},
/**
* @return {number} s
*/
get size() {
return size;
},
/**
* @param {(size: number, timeMS: number) => string} f
*/
set formatter(f) {
format = f;
},
/**
* @param {() => void | Promise<void>} f
*/
async setup(f) {
if (!setupCalled) {
await f();
setupCalled = true;
}
},
/**
* @param {() => (Promise<void> | void) } f
*/
set teardown(f) {
teardown = f;
},
},
i,
);
if (t1 == 0) {
t1 = Date.now();
}
const dur = t1 - t0;
times.push(dur);
sum += dur;
}
if (teardown) {
await teardown();
}
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};
}
/**
* @param {number} size
* @param {number} timeMS
*/
function formatToMBPerSecond(size, timeMS) {
const bytes = (size / timeMS) * 1000;
return (bytes / 2 ** 20).toFixed(2) + ' MB/s';
}
/**
* @param {string} x
* @return {(size: number, timeMS: number) => string}
*/
function makeFormatXPerSecond(x) {
return (size, timeMS) => `${((size / timeMS) * 1000).toFixed(2)} ${x}/s`;
}
const formatTxPerSecond = makeFormatXPerSecond('tx');
const formatOpPerSecond = makeFormatXPerSecond('op');
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,
benchmarkWriteReadRoundTrip,
bench => createIndex(bench, {numKeys: 1000}),
bench => createIndex(bench, {numKeys: 5000}),
];
let current = 0;
async function nextTest() {
if (current < benchmarks.length) {
return await benchmark(benchmarks[current++]);
}
return null;
}
// @ts-ignore
window.nextTest = nextTest;
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