v8/tools/heap-stats/helper.js

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// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
const KB = 1024;
const MB = KB * KB;
const GB = MB * KB;
const kMillis2Seconds = 1 / 1000;
function formatBytes(bytes) {
const units = ['B', 'KiB', 'MiB', 'GiB'];
const divisor = 1024;
let index = 0;
while (index < units.length && bytes >= divisor) {
index++;
bytes /= divisor;
}
return bytes.toFixed(2) + units[index];
}
function formatSeconds(millis) {
return (millis * kMillis2Seconds).toFixed(2) + 's';
}