Convert iphone's HEIC files in a folder into JPEGs (its slow)

convert.js

const fs = require('fs').promises
const path = require('path')
const convert = require('heic-convert')

async function getFiles(folder){
    const filesFound = await fs.readdir(folder)
    const files = []

    filesFound.forEach(file => {
        files.push(path.join(folder, file))
    })

    return files
}

async function convertFile(file){
    const input = await fs.readFile(file)
    const output = await convert({
        buffer: input,
        format: "JPEG",
        quality: 1
    });

    await fs.writeFile(file + ".jpg", output)
}

async function run(){
    const dir = "/path/to/the/folder/"
    const files = await getFiles(dir);
    for(let i = 0; i < files.length; i ++){
        await convertFile(files[i])
    }
}

run();