Martin von Zweigbergk 72245cfac5 merged_tree: add Stream-based version of diff(), delegating for now ... I'm going to implement a `Stream`-based version optimized for high-latency (RPC-based) commit backends. So far, that implementation is about 20% slower in the Linux repo when running `jj diff --ignore-working-copy -s --from v5.0 --to v6.0`. I think that's almost only because the algorithm is different, not because it's async per se. This commit adds a `Stream`-based version of `MergedTree::diff()` that just wraps the regular iterator in stream. I updated `jj diff` to use it. I couldn't measure any difference on the command above in the Linux repo. I think that means we can safely use the same `Stream`-based interface regardless of backend, even if we end up needing two different implementations of the `Stream`. We would then be using the wrapped iterator from this commit for local backends, and the new implementation for remote backends. But ideally we can make the remote-friendly implementation fast enough that we don't need two implementations.		2023-11-03 08:15:10 -07:00
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src	merged_tree: add Stream-based version of diff(), delegating for now	2023-11-03 08:15:10 -07:00
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