54 lines
1.5 KiB
JavaScript
54 lines
1.5 KiB
JavaScript
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// Copyright 2021 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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export const KB = 1024;
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export const MB = KB * KB;
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export const GB = MB * KB;
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export const kMillis2Seconds = 1 / 1000;
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export const kMicro2Milli = 1 / 1000;
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export function formatBytes(bytes) {
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const units = ['B', 'KiB', 'MiB', 'GiB'];
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const divisor = 1024;
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let index = 0;
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while (index < units.length && bytes >= divisor) {
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index++;
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bytes /= divisor;
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}
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return bytes.toFixed(2) + units[index];
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}
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export function formatMicroSeconds(micro) {
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return (micro * kMicro2Milli).toFixed(1) + 'ms';
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}
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export function formatDurationMicros(micros, secondsDigits = 3) {
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return formatDurationMillis(micros * kMicro2Milli, secondsDigits);
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}
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export function formatDurationMillis(millis, secondsDigits = 3) {
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if (millis < 1000) {
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if (millis < 1) {
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return (millis / kMicro2Milli).toFixed(1) + 'ns';
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}
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return millis.toFixed(2) + 'ms';
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}
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let seconds = millis / 1000;
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const hours = Math.floor(seconds / 3600);
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const minutes = Math.floor((seconds % 3600) / 60);
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seconds = seconds % 60;
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let buffer = '';
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if (hours > 0) buffer += hours + 'h ';
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if (hours > 0 || minutes > 0) buffer += minutes + 'm ';
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buffer += seconds.toFixed(secondsDigits) + 's';
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return buffer;
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}
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// Get the offset in the 4GB virtual memory cage.
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export function calcOffsetInVMCage(address) {
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let mask = (1n << 32n) - 1n;
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let ret = Number(address & mask);
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return ret;
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}
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