> Am 20.01.2017 um 03:57 schrieb Kyriakos Zarifis <kyr.zari...@gmail.com>:
> 
> * ... and by "here" I meant "here" 

:)

> On Thu, Jan 19, 2017 at 6:54 PM, Kyriakos Zarifis <kyr.zari...@gmail.com> 
> wrote:
> Sounds great!
> 
> 
> Very interested. I'd like to add a page over at 
> https://icing.github.io/mod_h2/ about it, so that people can easily grasp 
> what the advantages are. For that, your numbers (do you have screenshots of 
> browser timelines maybe?) would be very welcome. Also that someone besides 
> the module author has measured it adds credibility. :-)
> 
> If you write yourself somewhere about it, I am happy to link that.
> 
> Since anything I write would be incomplete without your description of what 
> caused it and how you resolved it, I put together a WIP write up here, with 
> screenshots / link to logs*. Feel free to use it as you want or let me know 
> if you'd like more details; I'm happy to help write the complete story for a 
> page on https://icing.github.io/mod_h2/ , which is probably the most 
> reasonable place to gather the relevant bits.
> 
> Cheers
> 
> 
> 
> * I rerun the tests to capture timeline screenshots, so the server-logs don't 
> exactly correspond to those screenshots, but the behaviors were the same
> * Note that the delays in the timeline pictures are worse than those seen on 
> server logs, which have been more helpful for understanding application-layer 
> behavior. I think what's causing this is a bloated output buffer in the case 
> where the server aggressively writes low-prio data (verified this by 
> monitoring the buffer size which keeps increasing during the test)

Certainly an area to improve upon. mod_http2 is still writing so much into the 
socket that responsiveness suffers. This gives the best throughput performance, 
though. I know that the h2o server guys also experimented with interrogating 
TCP windows to prevent bloat. Have to look at that again.

Cheers,

Stefan Eissing

<green/>bytes GmbH
Hafenstrasse 16
48155 Münster
www.greenbytes.de

Reply via email to