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benchmark code from blog post
// Run with node --expose-gc bench.js ../automerge-paper.json.gz
// automerge-paper.json.gz from https://github.com/josephg/crdt-benchmarks
// Read in a patch file and check that the patches all apply correctly.
const fs = require('fs')
const assert = require('assert')
const zlib = require('zlib')
const automerge = require('automerge')
const v8 = require('v8')
// For automerge-rs
// const backend = require('automerge-backend-wasm')
// automerge.setDefaultBackend(backend)
const filename = process.argv[2]
if (filename == null) {
console.error(`Usage: $ ${process.argv.join(' ')} file.json[.gz]`)
process.exit(1)
}
//console.log('snapshot', v8.writeHeapSnapshot())
gc()
console.log(v8.getHeapStatistics())
const startMemory = v8.getHeapStatistics().used_heap_size
console.log('Processing with automerge version', require('./node_modules/automerge/package.json').version)
const {
startContent,
endContent,
txns
} = JSON.parse(
filename.endsWith('.gz')
? zlib.gunzipSync(fs.readFileSync(filename))
: fs.readFileSync(filename, 'utf-8')
)
console.log('applying', txns.length, 'txns...')
console.time('apply')
let state = automerge.from({text: new automerge.Text("hi")})
for (let i = 0; i < txns.length; i++) {
//if (i > 20000) break
if (i % 10000 == 0) console.log(i)
const {patches} = txns[i]
for (const [pos, delHere, insContent] of patches) {
// console.log(pos, delHere, insContent)
state = automerge.change(state, doc => {
if (delHere > 0) doc.text.deleteAt(pos, delHere)
if (insContent !== '') doc.text.insertAt(pos, insContent)
})
}
}
console.timeEnd('apply')
gc()
console.log(v8.getHeapStatistics())
//console.log('snapshot', v8.writeHeapSnapshot())
// assert.strictEqual(state.text.toSpans().join(''), endContent)
console.log('RAM used:', v8.getHeapStatistics().used_heap_size - startMemory)
console.log(state.text.toSpans().length, 'spans')
// Read in a patch file and check that the patches all apply correctly.
import fs from 'fs'
import assert from 'assert'
import zlib from 'zlib'
import v8 from 'v8'
import {Doc} from 'diamond-js'
const filename = process.argv[2]
if (filename == null) {
console.error(`Usage: $ ${process.argv.join(' ')} file.json[.gz]`)
process.exit(1)
}
// console.log(v8.getHeapStatistics())
// console.log('snapshot', v8.writeHeapSnapshot())
// gc()
// let startHeap = v8.getHeapStatistics().used_heap_size
const perf = []
let start, lastTime
const mark = (i) => {
let now = performance.now()
perf.push({time: now - start, thisTime: now - lastTime, count: i})
lastTime = now
}
const {
startContent,
endContent,
txns
} = JSON.parse(
filename.endsWith('.gz')
? zlib.gunzipSync(fs.readFileSync(filename))
: fs.readFileSync(filename, 'utf-8')
)
console.log('applying', txns.length, 'txns...')
const run = () => {
perf.length = 0
start = lastTime = performance.now()
const state = new Doc()
for (let i = 0; i < txns.length; i++) {
// if (i > 20000) break
// if (i % 10000 == 0) console.log(i)
if (i % 1000 == 0) mark(i)
const {patches} = txns[i]
for (const [pos, delHere, insContent] of patches) {
// console.log(pos, delHere, insContent)
if (delHere > 0) state.del(pos, delHere)
if (insContent !== '') state.ins(pos, insContent)
}
}
mark(txns.length)
// assert.strictEqual(state.get(), endContent)
// return state.len()
// console.log(JSON.stringify(state.get_txn_since([])).length)
}
const run2 = () => {
const state = new Doc()
for (let i = 0; i < 5000000; i++) {
state.ins(0, 'x')
}
assert.strictEqual(state.len(), 5000000)
}
// warm up
// for (let i = 0; i < 10; i++) run()
run()
run()
run()
run()
run()
run()
console.time('apply')
// const len = run2()
const len = run()
console.timeEnd('apply')
// gc()
// console.log(v8.getHeapStatistics())
// console.log('heap', v8.getHeapStatistics().used_heap_size - startHeap)
// console.log('snapshot', v8.writeHeapSnapshot())
// assert.strictEqual(state.text.toSpans().join(''), endContent)
// assert.strictEqual(doc.get(), endContent)
// console.log(len)
fs.writeFileSync('perf.json', JSON.stringify(perf))
// Run with node --expose-gc bench.js ../automerge-paper.json.gz
// automerge-paper.json.gz from https://github.com/josephg/crdt-benchmarks
// Read in a patch file and check that the patches all apply correctly.
const fs = require('fs')
const assert = require('assert')
const zlib = require('zlib')
const Y = require('yjs')
const v8 = require('v8')
const filename = process.argv[2]
if (filename == null) {
console.error(`Usage: $ ${process.argv.join(' ')} file.json[.gz]`)
process.exit(1)
}
// console.log('snapshot', v8.writeHeapSnapshot())
console.log(v8.getHeapStatistics())
console.log('heap', process.memoryUsage().heapUsed)
const {
startContent,
endContent,
txns
} = JSON.parse(
filename.endsWith('.gz')
? zlib.gunzipSync(fs.readFileSync(filename))
: fs.readFileSync(filename, 'utf-8')
)
const run = () => {
gc()
const startMemory = v8.getHeapStatistics().used_heap_size
const state = new Y.Doc()
for (let i = 0; i < txns.length; i++) {
// if (i > 20000) break
// if (i % 10000 == 0) console.log(i)
const {patches} = txns[i]
state.transact(txn => {
const text = txn.doc.getText()
for (const [pos, delHere, insContent] of patches) {
// console.log(pos, delHere, insContent)
if (delHere > 0) text.delete(pos, delHere)
if (insContent !== '') text.insert(pos, insContent)
// state = automerge.change(state, doc => {
// if (delHere > 0) doc.text.deleteAt(pos, delHere)
// if (insContent !== '') doc.text.insertAt(pos, insContent)
// })
}
})
}
gc()
console.log('RAM used:', v8.getHeapStatistics().used_heap_size - startMemory)
console.log(state.getText().length)
console.log(txns.length)
}
const run2 = () => {
// const state = new Doc()
const state = new Y.Doc()
const text = state.getText()
for (let i = 0; i < 5000000; i++) {
text.insert(0, 'x')
}
assert.strictEqual(text.length, 5000000)
}
console.log('applying', txns.length, 'txns...')
run()
run()
run()
console.time('apply')
run()
console.timeEnd('apply')
// gc()
console.log(v8.getHeapStatistics())
console.log('heap', process.memoryUsage().heapUsed)
// console.log('snapshot', v8.writeHeapSnapshot())
// assert.strictEqual(state.text.toSpans().join(''), endContent)
// assert.strictEqual(state.getText().toJSON(), endContent)
// Again, run against automerge-paper.json.gz. Sorry about this code. No, I'm not sorry. Welcome to research.
const fs = require('fs')
const assert = require('assert')
const zlib = require('zlib')
const v8 = require('v8')
const filename = process.argv[2]
if (filename == null) {
console.error(`Usage: $ node check.js file.json[.gz]`)
process.exit(1)
}
const {
startContent,
endContent,
txns
} = JSON.parse(
filename.endsWith('.gz')
? zlib.gunzipSync(fs.readFileSync(filename))
: fs.readFileSync(filename, 'utf-8')
)
console.log('applying', txns.length, 'txns...')
const x = () => {
let content = startContent
gc()
const startMemory = v8.getHeapStatistics().used_heap_size
console.time('apply')
let lastTime = 0
for (let i = 0; i < txns.length; i++) {
const {time, patches} = txns[i]
for (const [pos, delHere, insContent] of patches) {
const before = content.slice(0, pos)
const after = content.slice(pos + delHere)
content = before + insContent + after
}
}
gc()
console.log('RAM used:', v8.getHeapStatistics().used_heap_size - startMemory)
console.timeEnd('apply')
console.log(txns.length)
assert.strictEqual(content, endContent)
}
x()
console.log(`Looking good - ${txns.length} apply cleanly.`)
// Copy into the reference-crdts repository and run with node --loader ts-node/esm --expose-gc ref-crdt-bench.ts
import zlib from 'zlib'
import fs from 'fs'
import {Algorithm, newDoc, localDelete, yjsMod, automerge, getArray, sync9} from './crdts'
import assert from 'assert'
import v8 from 'v8'
const bench = (algName: string, alg: Algorithm) => {
// const filename = 'sveltecomponent'
const filename = 'automerge-paper'
const {
startContent,
endContent,
txns
} = JSON.parse(zlib.gunzipSync(fs.readFileSync(`../crdt-benchmarks/${filename}.json.gz`)).toString())
console.time(`${algName} ${filename}`)
;(globalThis as any).gc()
const startMemory = v8.getHeapStatistics().used_heap_size
const doc = newDoc()
let i = 0
for (const txn of txns) {
if (++i % 10000 === 0) console.log(i)
for (const patch of txn.patches) {
// Ignoring any deletes for now.
const [pos, delCount, inserted] = patch as [number, number, string]
if (inserted.length) {
alg.localInsert(doc, 'A', pos, inserted)
} else if (delCount) {
localDelete(doc, 'A', pos)
}
}
}
console.timeEnd(`${algName} ${filename}`)
;(globalThis as any).gc()
console.log('RAM used:', v8.getHeapStatistics().used_heap_size - startMemory)
assert.strictEqual(getArray(doc).join(''), endContent)
console.log(txns.length)
}
// bench('yjs mod', yjsMod)
bench('automerge', automerge)
// bench('sync9', sync9)
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