rdtsc/dist/rdtscJs.cjs

The most high resolution cross platform timing in NodeJs that use processor command RDTSC. Calculate performance with accuracy +/- 4 processor cycles.

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var rdtscDefault = require('./rdtscDefault.cjs');

const rdtsc = typeof process === 'undefined'
    ? () => BigInt(Math.round(performance.now() * 1000))
    : () => {
        return process.hrtime.bigint();
    };
const result = [];
let index = 0;
const MAX_BIGINT = (BigInt(1) << BigInt(64)) - BigInt(1);
function init(funcsCount) {
    for (let i = 0; i < funcsCount; i++) {
        result[i] = MAX_BIGINT;
    }
    if (result.length > funcsCount) {
        result.length = funcsCount;
    }
    index = 0;
}
let m0 = BigInt(0);
function mark0() {
    m0 = rdtsc();
}
function mark1() {
    const m1 = rdtsc();
    const diff = m1 - m0;
    if (diff < result[index]) {
        result[index] = diff;
    }
    index++;
}
function minCycles() {
    return result;
}
function runInRealtimePriority(func) {
    return func();
}
const rdtscJs = {
    init,
    mark0,
    mark1,
    minCycles,
    rdtsc,
    runInRealtimePriority,
};
if (typeof process === 'undefined') {
    rdtscDefault.setRdtscDefault(rdtscJs);
}

exports.rdtsc = rdtsc;
exports.rdtscJs = rdtscJs;
exports.runInRealtimePriority = runInRealtimePriority;