node-opcua-utils
Version:
pure nodejs OPCUA SDK - module utils
32 lines • 1.2 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.hrtime = void 0;
// polyfil for window.performance.now
const performance = (typeof global === "object" && global.performance) || {};
const performanceNow = performance.now ||
performance.mozNow ||
performance.msNow ||
performance.oNow ||
performance.webkitNow ||
function () {
return new Date().getTime();
};
// generate timestamp or delta
// see http://nodejs.org/api/process.html#process_process_hrtime
function hrtime_for_browser(previousTimestamp) {
previousTimestamp = previousTimestamp || [0, 0];
const clocktime = performanceNow.call(performance) * 1e-3;
let seconds = Math.floor(clocktime);
let nanoseconds = Math.floor((clocktime % 1) * 1e9);
if (previousTimestamp) {
seconds = seconds - previousTimestamp[0];
nanoseconds = nanoseconds - previousTimestamp[1];
if (nanoseconds < 0) {
seconds--;
nanoseconds += 1e9;
}
}
return [seconds, nanoseconds];
}
exports.hrtime = typeof process === "object" ? (process.hrtime || hrtime_for_browser) : hrtime_for_browser;
//# sourceMappingURL=hrtime.js.map