@kobakazu0429/wasmer-wasi/lib/polyfills/browser-hrtime.js

Isomorphic Javascript library for interacting with WASI Modules in Node.js and the Browser. 📚

"use strict";
// hrtime polyfill for the browser
Object.defineProperty(exports, "__esModule", { value: true });
const baseNow = Math.floor((Date.now() - performance.now()) * 1e-3);
function hrtime(previousTimestamp) {
    // initilaize our variables
    let clocktime = performance.now() * 1e-3;
    let seconds = Math.floor(clocktime) + baseNow;
    let nanoseconds = Math.floor((clocktime % 1) * 1e9);
    // Compare to the prvious timestamp if we have one
    if (previousTimestamp) {
        seconds = seconds - previousTimestamp[0];
        nanoseconds = nanoseconds - previousTimestamp[1];
        if (nanoseconds < 0) {
            seconds--;
            nanoseconds += 1e9;
        }
    }
    // Return our seconds tuple
    return [seconds, nanoseconds];
}
exports.default = hrtime;