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by thramp
2339 days ago
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The reason the `http` crate has a "bespoke hashmap implementation" is not because "performance", it's because _HTTP headers call for different behavior than `std::collections::HashMap`_. Some of the differences in behavior include: - The map needs to be a multimap. - Insertion order needs to be preserved. While `std::collections::HashMap` is an excellent HashMap, it is not a good fit for HTTP headers. |
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