For an origin page utilizing 100% of it's available processor resources, yes.
But in the real world most websites don't do this. What likely matters to the user is that the page they're navigating to opens faster; the user likely doesn't care about the performance of the hidden tab they just came from.
Of course, `noopener` has security and privacy benefits which may outweigh the performance costs (if there are any).
But in the real world most websites don't do this. What likely matters to the user is that the page they're navigating to opens faster; the user likely doesn't care about the performance of the hidden tab they just came from.
Of course, `noopener` has security and privacy benefits which may outweigh the performance costs (if there are any).