Copy Files Examples - Bun/Node

script.mjs

import fs from 'fs/promises';
import path from 'path';
const source = '/Volumes/Untitled/DCIM/101MSDCF'
const dest = '/Volumes/JonLuca\'s\ Pics/Pics/San\ Francisco,\ CA\ \(Fleetweek\)/'

const sourceFiles = await fs.readdir(source)
const destFiles = await fs.readdir(dest)
const filesToCopy = sourceFiles.filter(f => !destFiles.includes(f))
console.log(`Copying ${filesToCopy.length} files`)
let done = 0;
let totalTime = 0;  // to keep track of the total time taken

for(const file of filesToCopy){
    const start = performance.now();
    await fs.cp(path.join(source, file), path.join(dest,file))
    const elapsed = performance.now() - start;
    
    totalTime += elapsed;
    ++done;

    if(done %10 === 0){
    	const avgTime = totalTime / done

        console.log(`Completed ${done} - ${avgTime.toFixed(2)}`)
    }
}
const avgTime = totalTime / filesToCopy.length;

console.log(`Done. Average time to copy each file: ${avgTime.toFixed(2)}ms`);