push and pull with different formats extremely slow on network

[Robert Collins]

Because InterDifferingSerializer kicks in always when formats aren't identical we end up doing lots of round trips when converting. This is fast when latency is low but very bad when it isn't - such as networked situations. In networked situations the streamng code paths that can also do conversion are faster [but not incremental].

See also bug 374738.

[Andrew Bennetts (spiv)]

My lp:~spiv/bzr/inventory-delta branch fixes this, I think. (I haven't benchmarked it yet, but it streams rather than using InterDifferingSerializer so it ought to be much much better.)

[Samuel Bronson (naesten)]

As long as it doesn't use 95% VFS operations it should almost certainly be better :-).

So ... the server-side part is also waiting until 1.19dev before it will be merged? Meaning we have to wait >1month before launchpad will have it?

[Martin Pool (mbp)]

2009/8/11 Samuel Bronson <email address hidden>:
> As long as it doesn't use 95% VFS operations it should almost certainly
> be better :-).
>
> So ... the server-side part is also waiting until 1.19dev before it will
> be merged? Meaning we have to wait >1month before launchpad will have
> it?

Sadly yes.

[Andrew Bennetts (spiv)]

I believe this is now fixed in bzr.dev. (Requires both the server and client to be running new bzr.dev.)