Run results for: RequireJS paths processing

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:80.0) Gecko/20100101 Firefox/80.0

Browser: Firefox 80

Operating system: Mac OS X 10.14

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
path part splitting and joining	574851.9 Ops/sec
looking up path separators	1319496.0 Ops/sec

Script Preparation code:

const pathMap = new Map()
pathMap.set('test', 'site/app')
pathMap.set('vendor', 'site/vendor')
window.pathMap = pathMap
window.testId = 'test/lib/alpaca/js/alpaca'

Tests:

path part splitting and joining
const pathMap = window.pathMap const parts = window.testId.split('/') let modified for (let { length } = parts; length > 0; --length) { const parent = parts.slice(0, length).join('/') const path = pathMap.get(parent) if (path) { parts.splice(0, length, path) modified = true break } } const mapped = parts.join('/')
looking up path separators
const pathMap = window.pathMap let mapped = window.testId for (let separator = mapped.length;;) { const parent = mapped.substr(0, separator) const path = pathMap.get(parent) if (path) { mapped = `${path}${mapped.substr(separator)}` break } separator = mapped.lastIndexOf('/', separator - 1) if (separator < 0) break }

Run results for: RequireJS paths processing

Replace path prefixes either by splitting and concatenating path parts or by looking up separators in the path.

path part splitting and joining

looking up path separators