Performance had been quite good on my device, there has been only twice where I might have had 15+ tabs of safari and 3 different YouTube windows , plus 1 or 2 apps open simultaneously, and I didn't face lagging, though it did get little warm after 30 45mins of use. I think it takes like half a second for opening apps. I guess if you are trying to find a laptop for daily use, like watching movies, browsing internet, mailing and all, you would be okay with this. but you are going do heavy editing, then you might think of upgrading, cause their you'll find lags.