bors bd84c73ffe Auto merge of #99123 - mystor:crossbeam_bridge, r=eddyb ... proc_macro: use crossbeam channels for the proc_macro cross-thread bridge This is done by having the crossbeam dependency inserted into the `proc_macro` server code from the server side, to avoid adding a dependency to `proc_macro`. In addition, this introduces a -Z command-line option which will switch rustc to run proc-macros using this cross-thread executor. With the changes to the bridge in #98186, #98187, #98188 and #98189, the performance of the executor should be much closer to same-thread execution. In local testing, the crossbeam executor was substantially more performant than either of the two existing `CrossThread` strategies, so they have been removed to keep things simple. r? `@eddyb`		2022-07-30 04:05:28 +00:00
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src	Auto merge of #99123 - mystor:crossbeam_bridge, r=eddyb	2022-07-30 04:05:28 +00:00
Cargo.toml	Revert "Remove num_cpus dependency from bootstrap, build-manifest and rustc_session"	2022-06-09 03:10:15 -07:00