What is the difference between performance.now() and Date.now()? Should I consider performance.now() as a replacement for Date.now() since performace.now() is more consistent and independent?

I'm writing a jestjs test for a ES6 class that uses performance.now(). But it doesn't seem to work. Is there a way to user perf-hooks globally from the jest.config.js? Or a way to mock performance...

I am getting an error ReferenceError: performance is not defined when trying to use performance.now() to measure the execution time of a function call: export async function find(someId: string, c...

Assumptions: rAF now time is calculated at the time the set of callbacks are all triggered. Therefore any blocking that happens before the first callback of that frame is called doesn't affect the ...

I found several articles on the Internet and questions here about how to measure the code performance in Node. But I got results that differ by about two times, depending on the measurement tool. T...

The situation When writing high-performance JavaScript code, the standard profiling tools offered by Chrome et al are not always sufficient. They only seem to offer function-level granularity and ...

I am trying to time the execution of my function in milliseconds. I use performance.now() in order to do that. I am able to get the time on the first run, but on the second, third, and so on runs I...

I have a Node.js app. When I run node -v from the command-line, I see the following: v10.3.0 This is relevant because I'm interested in using the Performance Hooks. I've created the most basic th...

So I have a simple function: var start = function(){ lastFrame = performance.now(); requestAnimationFrame((t)=>{interval(t)}); } And my interval function (just for test purposes I have...

I'm new to Nodejs and I'm confused about something when timing: If Nodejs is Javascript, then why Javascript's performance.now() doesn't work on Nodejs and I'm forced to use console.time() o...

For a reaction time study (see also this question if you're interested) we want to control and measure the display time of images. We'd like to account for the time needed to repaint on different u...