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'use strict'
const { spawn } = require('child_process')
const cliSelect = require('cli-select')
const simpleGit = require('simple-git')
const git = simpleGit(process.cwd())
const COMMAND = 'npm run bench'
const DEFAULT_BRANCH = 'main'
const PERCENT_THRESHOLD = 5
const greyColor = '\x1b[30m'
const redColor = '\x1b[31m'
const greenColor = '\x1b[32m'
const resetColor = '\x1b[0m'
async function selectBranchName (message, branches) {
console.log(message)
const result = await cliSelect({
type: 'list',
name: 'branch',
values: branches
})
console.log(result.value)
return result.value
}
async function executeCommandOnBranch (command, branch) {
console.log(`${greyColor}Checking out "${branch}"${resetColor}`)
await git.checkout(branch)
console.log(`${greyColor}Execute "${command}"${resetColor}`)
const childProcess = spawn(command, { stdio: 'pipe', shell: true })
let result = ''
childProcess.stdout.on('data', (data) => {
process.stdout.write(data.toString())
result += data.toString()
})
await new Promise(resolve => childProcess.on('close', resolve))
console.log()
return parseBenchmarksStdout(result)
}
function parseBenchmarksStdout (text) {
const results = []
const lines = text.split('\n')
for (const line of lines) {
const match = /^(.+?)(\.*) x (.+) ops\/sec .*$/.exec(line)
if (match !== null) {
results.push({
name: match[1],
alignedName: match[1] + match[2],
result: parseInt(match[3].split(',').join(''))
})
}
}
return results
}
function compareResults (featureBranch, mainBranch) {
for (const { name, alignedName, result: mainBranchResult } of mainBranch) {
const featureBranchBenchmark = featureBranch.find(result => result.name === name)
if (featureBranchBenchmark) {
const featureBranchResult = featureBranchBenchmark.result
const percent = (featureBranchResult - mainBranchResult) * 100 / mainBranchResult
const roundedPercent = Math.round(percent * 100) / 100
const percentString = roundedPercent > 0 ? `+${roundedPercent}%` : `${roundedPercent}%`
const message = alignedName + percentString.padStart(7, '.')
if (roundedPercent > PERCENT_THRESHOLD) {
console.log(`${greenColor}${message}${resetColor}`)
} else if (roundedPercent < -PERCENT_THRESHOLD) {
console.log(`${redColor}${message}${resetColor}`)
} else {
console.log(message)
}
}
}
}
(async function () {
const branches = await git.branch()
const currentBranch = branches.branches[branches.current]
let featureBranch = null
let mainBranch = null
if (process.argv[2] === '--ci') {
featureBranch = currentBranch.name
mainBranch = DEFAULT_BRANCH
} else {
featureBranch = await selectBranchName('Select the branch you want to compare (feature branch):', branches.all)
mainBranch = await selectBranchName('Select the branch you want to compare with (main branch):', branches.all)
}
try {
const featureBranchResult = await executeCommandOnBranch(COMMAND, featureBranch)
const mainBranchResult = await executeCommandOnBranch(COMMAND, mainBranch)
compareResults(featureBranchResult, mainBranchResult)
} catch (error) {
console.error('Switch to origin branch due to an error', error.message)
}
await git.checkout(currentBranch.commit)
await git.checkout(currentBranch.name)
console.log(`${greyColor}Back to ${currentBranch.name} ${currentBranch.commit}${resetColor}`)
})()