pustovitDmytro / vesta

import Counter from './Counter';

function safeGetKey(report, key) {

    return report[key] || 0;

}

export default class ProcessMemoryCountrer extends Counter {

    bench() {

        return process.memoryUsage();

    }

    static prettify(data) {

        // eslint-disable-next-line no-magic-numbers

        return `${Math.round(data / 1024 / 1024 * 100) / 100}MB`;

    }

    diff(start, end) {

        const res = {};

        const keys = new Set([

            ...Object.keys(start),

            ...Object.keys(end)

        ]);

        keys.forEach(key => {

            res[key] = safeGetKey(end, key) - safeGetKey(start, key);

        });

        return res;

    }

}