{"size": 1768, "ext": "js", "max_stars_repo_path": "p8.js", "max_stars_repo_name": "misaunde/euler-solutions-js", "max_stars_repo_stars_event_min_datetime": null, "max_stars_repo_stars_event_max_datetime": null, "max_issues_repo_path": "p8.js", "max_issues_repo_name": "misaunde/euler-solutions-js", "max_issues_repo_issues_event_min_datetime": null, "max_issues_repo_issues_event_max_datetime": null, "max_forks_repo_path": "p8.js", "max_forks_repo_name": "misaunde/euler-solutions-js", "max_forks_repo_forks_event_min_datetime": null, "max_forks_repo_forks_event_max_datetime": null}
{"max_stars_count": null, "max_issues_count": null, "max_forks_count": null, "avg_line_length": 60.9655172414, "max_line_length": 1016, "alphanum_fraction": 0.8009049774}
const { performance } = require('perf_hooks');
var _ = require('lodash');

let bignum = "7316717653133062491922511967442657474235534919493496983520312774506326239578318016984801869478851843858615607891129494954595017379583319528532088055111254069874715852386305071569329096329522744304355766896648950445244523161731856403098711121722383113622298934233803081353362766142828064444866452387493035890729629049156044077239071381051585930796086670172427121883998797908792274921901699720888093776657273330010533678812202354218097512545405947522435258490771167055601360483958644670632441572215539753697817977846174064955149290862569321978468622482839722413756570560574902614079729686524145351004748216637048440319989000889524345065854122758866688116427171479924442928230863465674813919123162824586178664583591245665294765456828489128831426076900422421902267105562632111110937054421750694165896040807198403850962455444362981230987879927244284909188845801561660979191338754992005240636899125607176060588611646710940507754100225698315520005593572972571636269561882670428252483600823257530420752963450";

function greatestProduct(num, width) {
    let max = 0;
    let stringNum = num;
    if (width >= stringNum.length) 
        return stringNum.reduce((a,b) => a*b)

    for (var i=0; i<stringNum.length-width; i++) {
        let slice = stringNum.substring(i, i+width);
        let product = slice.split('').reduce((a,b) => a*b[0]);
        if (product > max) 
            max = product;
    }
    return max;
}

let t0 = performance.now();
console.log("largest: ", greatestProduct(bignum, 13));
console.log("time: ", (performance.now() - t0) + " ms");


//==============================
// largest:  23514624000
// time:  2.3137370347976685 ms
//==============================