[sstephenson]

At that point it's much more about feel than a hard time measurement.

After implementing deferred initialization I asked myself "does reordering feel laggy?" and the answer was no. If it had felt laggy then I'd have started profiling again.

[joshuacc]

Excellent article. Do you mind going into what tools/techniques you used to do the profiling?

[sstephenson]

Sure thing.

For high-level measurements I use good old "new Date().getTime()". One call before, one call after, subtract the former from the latter and log it to the console.

When I want to dig deeper, I go to the WebKit Inspector's Profile tab. You can turn it on or off through the UI, or use console.profile()/console.profileEnd() in your code to control it programmatically.

[masklinn]

>For high-level measurements I use good old "new Date().getTime()". One call before, one call after, subtract the former from the latter and log it to the console.

Why not use `console.time` and `console.timeEnd` for that? They probably have the same resolution as the underlying date object and they're significantly less of a hassle.

[sstephenson]

Because I didn't know about it :) Great tip!