rustdoc_json: Remove one call to std::mem::take in after_krate#150867
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rust-bors[bot] merged 1 commit intorust-lang:mainfrom Jan 11, 2026
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rustdoc_json: Remove one call to std::mem::take in after_krate#150867rust-bors[bot] merged 1 commit intorust-lang:mainfrom
std::mem::take in after_krate#150867rust-bors[bot] merged 1 commit intorust-lang:mainfrom
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This patch removes one call to `std::mem::take` to save two `memcpy`s: `JsonRenderer::index` can be quite large as noted rust-lang#142335. `self.index` can be passed directly to `types::Crate`. This removal makes `self` immutable. The private `serialize_and_write` method is moved as a function: the `self` argument is replaced by `sess: &Session`. This `&Session` was fetched earlier in `after_krate` in all cases. This change allows to call `serialize_and_write` after `output_crate` is created, without having a conflict around the move of `self`: the borrow checker is now happy.
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Looks good to me, thanks! r=me once CI pass @bors delegate+ |
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✌️ @Hywan, you can now approve this pull request! If @GuillaumeGomez told you to " |
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@bors r=GuillaumeGomez |
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@bors rollup |
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…GuillaumeGomez rustdoc_json: Remove one call to `std::mem::take` in `after_krate` This patch removes one call to `std::mem::take` to save two `memcpy`s: `JsonRenderer::index` can be quite large as noted rust-lang#142335. `self.index` can be passed directly to `types::Crate`. This removal makes `self` immutable. The private `serialize_and_write` method is moved as a function: the `self` argument is replaced by `sess: &Session`. This `&Session` was fetched earlier in `after_krate` in all cases. This change allows to call `serialize_and_write` after `output_crate` is created, without having a conflict around the move of `self`: the borrow checker is now happy. I wasn't able to measure the performance impact though because I don't know how to modify `rustc-perf` as [@nnethercote did](rust-lang#142335 (comment)) (sorry). --- Follow up of rust-lang#142335. r? @nnethercote
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Rollup of 11 pull requests Successful merges: - #150269 (Remove inactive nvptx maintainer) - #150713 (mgca: Type-check fields of struct expr const args) - #150765 (rustc_parse_format: improve error for missing `:` before `?` in format args) - #150847 (Fix broken documentation links to SipHash) - #150867 (rustdoc_json: Remove one call to `std::mem::take` in `after_krate`) - #150872 (Fix some loop block coercion diagnostics) - #150874 (Ignore `rustc-src-gpl` in fast try builds) - #150875 (Refactor artifact keep mode in bootstrap) - #150876 (Mention that `rustc_codegen_gcc` is a subtree in `rustc-dev-guide`) - #150882 (Supress unused_parens lint for guard patterns) - #150884 (Update bors email in CI postprocessing step) Failed merges: - #150869 (Emit error instead of delayed bug when meeting mismatch type for const tuple) r? @ghost
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Rollup of 11 pull requests Successful merges: - #150269 (Remove inactive nvptx maintainer) - #150713 (mgca: Type-check fields of struct expr const args) - #150765 (rustc_parse_format: improve error for missing `:` before `?` in format args) - #150847 (Fix broken documentation links to SipHash) - #150867 (rustdoc_json: Remove one call to `std::mem::take` in `after_krate`) - #150872 (Fix some loop block coercion diagnostics) - #150874 (Ignore `rustc-src-gpl` in fast try builds) - #150875 (Refactor artifact keep mode in bootstrap) - #150876 (Mention that `rustc_codegen_gcc` is a subtree in `rustc-dev-guide`) - #150882 (Supress unused_parens lint for guard patterns) - #150884 (Update bors email in CI postprocessing step) Failed merges: - #150869 (Emit error instead of delayed bug when meeting mismatch type for const tuple) r? @ghost
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Rollup merge of #150867 - chore-librustdoc-json-mem-take, r=GuillaumeGomez rustdoc_json: Remove one call to `std::mem::take` in `after_krate` This patch removes one call to `std::mem::take` to save two `memcpy`s: `JsonRenderer::index` can be quite large as noted #142335. `self.index` can be passed directly to `types::Crate`. This removal makes `self` immutable. The private `serialize_and_write` method is moved as a function: the `self` argument is replaced by `sess: &Session`. This `&Session` was fetched earlier in `after_krate` in all cases. This change allows to call `serialize_and_write` after `output_crate` is created, without having a conflict around the move of `self`: the borrow checker is now happy. I wasn't able to measure the performance impact though because I don't know how to modify `rustc-perf` as [@nnethercote did](#142335 (comment)) (sorry). --- Follow up of #142335. r? @nnethercote
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Rollup of 11 pull requests Successful merges: - rust-lang/rust#150269 (Remove inactive nvptx maintainer) - rust-lang/rust#150713 (mgca: Type-check fields of struct expr const args) - rust-lang/rust#150765 (rustc_parse_format: improve error for missing `:` before `?` in format args) - rust-lang/rust#150847 (Fix broken documentation links to SipHash) - rust-lang/rust#150867 (rustdoc_json: Remove one call to `std::mem::take` in `after_krate`) - rust-lang/rust#150872 (Fix some loop block coercion diagnostics) - rust-lang/rust#150874 (Ignore `rustc-src-gpl` in fast try builds) - rust-lang/rust#150875 (Refactor artifact keep mode in bootstrap) - rust-lang/rust#150876 (Mention that `rustc_codegen_gcc` is a subtree in `rustc-dev-guide`) - rust-lang/rust#150882 (Supress unused_parens lint for guard patterns) - rust-lang/rust#150884 (Update bors email in CI postprocessing step) Failed merges: - rust-lang/rust#150869 (Emit error instead of delayed bug when meeting mismatch type for const tuple) r? @ghost
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This patch removes one call to
std::mem::taketo save twomemcpys:JsonRenderer::indexcan be quite large as noted #142335.self.indexcan be passed directly totypes::Crate. This removal makesselfimmutable.The private
serialize_and_writemethod is moved as a function: theselfargument is replaced bysess: &Session. This&Sessionwas fetched earlier inafter_kratein all cases. This change allows to callserialize_and_writeafteroutput_crateis created, without having a conflict around the move ofself: the borrow checker is now happy.I wasn't able to measure the performance impact though because I don't know how to modify
rustc-perfas @nnethercote did (sorry).Follow up of #142335.
r? @nnethercote