Dear diary, on Sun, May 15, 2005 at 01:22:19PM CEST, I got a letter
where "Adam J. Richter" <[email protected]> told me that...
> On Sun, 15 May 2005 10:54:05 +0200, Petr Baudis wrote:
> >Dear diary, on Thu, May 12, 2005 at 10:57:35PM CEST, I got a letter
> >where Matt Mackall <[email protected]> told me that...
> >> Does this need an HTTP request (and round trip) per object? It appears
> >> to. That's 2200 requests/round trips for my 800 patch benchmark.
>
> >Yes it does. On the other side, it needs no server-side CGI. But I guess
> >it should be pretty easy to write some kind of server-side CGI streamer,
> >and it would then easily take just a single HTTP request (telling the
> >server the commit ID and receiving back all the objects).
>
> I don't understand what was wrong with Jeff Garzik's previous
> suggestion of using http/1.1 pipelining to coalesce the round trips.
> If you're worried about queuing too many http/1.1 requests, the client
> could adopt a policy of not having more than a certain number of
> requests outstanding or perhaps even making a new http connection
> after a certain number of requests to avoid starving other clients
> when the number of clients doing one of these transfers exceeds the
> number of threads that the http server uses.
The problem is that to fetch a revision tree, you have to
send request for commit A
receive commit A
look at commit A for list of its parents
send request for the parents
receive the parents
look inside for list of its parents
...
(and same for the trees).
> Being able to do without a server side CGI script might
> encourage deployment a bit more, both for security reasons and
> effort of deployment.
You could still use it without the server side CGI script as it is now,
just without the speedups.
--
Petr "Pasky" Baudis
Stuff: http://pasky.or.cz/
C++: an octopus made by nailing extra legs onto a dog. -- Steve Taylor
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