What will this snippet print for the order and approximate value of the logged durations?
const { performance, PerformanceObserver } = require('perf_hooks');
const obs = new PerformanceObserver((list) => {
for (const e of list.getEntries()) console.log(e.name, e.duration);
});
obs.observe({ entryTypes: ['measure'] });
performance.mark('a');
setTimeout(() => {
performance.mark('b');
setTimeout(() => {
performance.mark('c');
performance.measure('a-to-b', 'a', 'b');
performance.measure('whole', 'a', 'c');
}, 30);
}, 20);