[oddx]

It's not clear what exactly they mean by cold start. I just ran a simple test with a worker returning hardcoded html without external requests (on a free plan):

1. First run: time_starttransfer: 0.507267s

2. Second run: time_starttransfer: 0.035244s

So it looks like at least some parts of the cold start taking much longer and aren't eliminated.

[kentonv]

Free tier is subject to lower quality-of-service in a number of areas. If you upgrade to a paid plan ($5/mo) you should see much better results.

We probably should have included a discussion of this in the blog post... sorry about that.

[carlosdp]

It could be due to cache warming?