bors 750bd1a7ff Auto merge of #101313 - SparrowLii:mk_attr_id, r=cjgillot ... make `mk_attr_id` part of `ParseSess` Updates #48685 The current `mk_attr_id` uses the `AtomicU32` type, which is not very efficient and adds a lot of lock contention in a parallel environment. This PR refers to the task list in #48685, uses `mk_attr_id` as a method of the `AttrIdGenerator` struct, and adds a new field `attr_id_generator` to `ParseSess`. `AttrIdGenerator` uses the `WorkerLocal`, which has two advantages: 1. `Cell` is more efficient than `AtomicU32`, and does not increase any lock contention. 2. We put the index of the work thread in the first few bits of the generated `AttrId`, so that the `AttrId` generated in different threads can be easily guaranteed to be unique. cc `@cjgillot`		2022-09-14 20:52:18 +00:00
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src	Auto merge of #101313 - SparrowLii:mk_attr_id, r=cjgillot	2022-09-14 20:52:18 +00:00
Cargo.toml	Replace rustc_data_structures::thin_vec::ThinVec with thin_vec::ThinVec.	2022-08-29 15:42:13 +10:00