import { PerformanceObserver } from "perf_hooks"; declare global { // eslint-disable-next-line no-var var perfObserver: PerformanceObserver | undefined; } export const perfObserver = globalThis.perfObserver || new PerformanceObserver((items) => { items.getEntries().forEach((entry) => { // Log entry duration in seconds with four decimal places. if (!!process.env.NEXT_PUBLIC_DEBUG) console.log(entry.name.replace("$1", `${(entry.duration / 1000.0).toFixed(4)}s`)); }); }); perfObserver.observe({ entryTypes: ["measure"] }); if (process.env.NODE_ENV !== "production") { globalThis.perfObserver = perfObserver; } export default perfObserver; export { performance } from "perf_hooks";