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fixes #139 There are other potential long term solutions listed [here](https://github.com/TrueLayer/reqwest-middleware/issues/139#issuecomment-2045946644) > I didn't put much thought into it. Internally there used to be a `Box<[Arc<dyn Middleware>]>` which is cloned about quite often. > > * https://docs.rs/reqwest-middleware/0.2.5/src/reqwest_middleware/client.rs.html#87 > * https://docs.rs/reqwest-middleware/0.2.5/src/reqwest_middleware/client.rs.html#139 > > Because of all the cloning, I decided to flip it to be `Arc<Box>` instead of `Box<Arc>`. > > I see three solutions here. > > 1. The one I'd lean towards is `Arc<Arc>` even if it's a bit silly, but prevents extra unnecessary allocations on each request. > 2. An alternative is to implement Middleware for Arc and then you can use the regular with(...) api. This would mean there's an extra box around your middleware > 3. Revert this particular change In the short term, I think it's best to go with option 3. This will unblock the next release. We can consider the other options for future releasees |
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