Regex Pre-Compilation Performance difference

regex-compile-perf.js

const RUNS = 100000;

// PRE-COMPILE REGEX

console.time('processRequest1')
const regex = RegExp(/^camera-([0-9]+)/)
function processRequest1(){
    let camId = regex.exec('camera-1')
    return camId
}
for (let i = 0; i < RUNS; i++) {
    processRequest1()
}
console.timeEnd('processRequest1')

// ---------------------------------------------------------

// NO PRE-COMPILE REGEX
console.time('processRequest2')
function processRequest(){
    let camId = /^camera-([0-9]+)/.exec('camera-1')
    return camId
}
for (let i = 0; i < RUNS; i++) {
    processRequest()
}
console.timeEnd('processRequest2')