Fix HtmlAsyncRenderer never flushing

[mesram]

The buffer automatically grows when capacity is exceeded (as indicated by the comment in the initialiser), so by definition .count can never exceed .capacity. And since buffer growth is likely exponential, it's highly unlikely that they would ever be equal.

[sliemeobn]

sorry for the delayed review.

even though I am still not 100% happy with how the chunking works, this looks a lot "more correct" that what I had before. so: thank you!

I feel there should be some way to

• use spans
• allocate very, very little
• don't exceed chunk-sizes somehow without a big performance hit

but that will be an exercise for a different day ; )

[mesram]

Awesome! No worries on the timeline, I'm honestly surprised you got back to me so quickly.

I've just been exploring Swift on server casually (well...hoping to convince work to let me use it in places) now that it seems a lot more mature and got really excited to see a library that meshed perfectly with my idea of how this stuff "should" work (I am needlessly frustrated by the waste in the Javascript ecosphere). Got pretty confused when it didn't seem to stream out like it looked like it should have, I legitimately thought it might have been a Hummingbird issue lol, or that I just didn't read the manual well enough. Was far too pleased when I got it to work and then streamed out 500MB of HTML while the server sat cooly at its 4MB baseline, and crashed the browser xD