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Split exported_symbols for generic and non-generic symbols #143013

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@bjorn3 bjorn3 commented Jun 25, 2025 •
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This reduces metadata decoder overhead during the monomorphization collector.

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r? @lcnr

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@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Jun 25, 2025
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rustbot commented Jun 25, 2025

Some changes occurred in compiler/rustc_codegen_ssa

cc @WaffleLapkin

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bjorn3 commented Jun 25, 2025
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bjorn3 commented Jun 25, 2025

@bors try @rust-timer queue

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@rustbot rustbot added the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Jun 25, 2025
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bors commented Jun 25, 2025

⌛ Trying commit 5e2d5cf with merge f72ce86...

bors added a commit that referenced this pull request Jun 25, 2025
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Auto merge of #143013 - bjorn3:split_exported_symbols, r=<try>
f72ce86 
Split exported_symbols for generic and non-generic symbols

This reduces metadata decoder overhead during the monomorphization collector.

This may help with incremental builds for Zed.
bjorn3
bjorn3 commented Jun 25, 2025
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compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs
// to block export of generics from dylibs, but we must fix
// rust-lang/rust#65890 before we can do that robustly.

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Accidentally committed this as part of this PR, but preventing export of generics from dylibs doesn't seem to be necessary anymore.

@bjorn3 bjorn3 force-pushed the split_exported_symbols branch from 5e2d5cf to 0fa3ea6 Compare June 25, 2025 14:36
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rustbot commented Jun 25, 2025

The Miri subtree was changed

cc @rust-lang/miri

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bjorn3 commented Jun 25, 2025

@bors2 try @rust-timer queue

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rust-bors bot commented Jun 25, 2025

⌛ Trying commit 0fa3ea6 with merge 536e35d…

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rust-bors bot added a commit that referenced this pull request Jun 25, 2025
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Auto merge of #143013 - bjorn3:split_exported_symbols, r=<try>
536e35d 
Split exported_symbols for generic and non-generic symbols

This reduces metadata decoder overhead during the monomorphization collector.

This may help with incremental builds for Zed.
@bjorn3 bjorn3 force-pushed the split_exported_symbols branch from 0fa3ea6 to f859eea Compare June 25, 2025 14:53
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bjorn3 commented Jun 25, 2025

@bors2 try cancel
@bors2 try

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Try build cancelled. Cancelled workflows:

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⌛ Trying commit f859eea with merge e9337fc…

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Auto merge of #143013 - bjorn3:split_exported_symbols, r=<try>
e9337fc 
Split exported_symbols for generic and non-generic symbols

This reduces metadata decoder overhead during the monomorphization collector.

This may help with incremental builds for Zed.
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rust-bors bot commented Jun 25, 2025

💔 Test failed

@bjorn3 bjorn3 force-pushed the split_exported_symbols branch from f859eea to aa10411 Compare June 25, 2025 15:36
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bjorn3 commented Jun 25, 2025

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bors added a commit that referenced this pull request Jun 25, 2025
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Auto merge of #143013 - bjorn3:split_exported_symbols, r=<try>
f4a3654 
Split exported_symbols for generic and non-generic symbols

This reduces metadata decoder overhead during the monomorphization collector.

This may help with incremental builds for Zed.
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bors commented Jun 25, 2025

⌛ Trying commit aa10411 with merge f4a3654...

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bors commented Jun 25, 2025

💔 Test failed - checks-actions

@bors bors added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jun 25, 2025
@bjorn3 bjorn3 force-pushed the split_exported_symbols branch from aa10411 to 91f653b Compare June 26, 2025 10:53
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bjorn3 commented Jun 26, 2025

@bors2 try @rust-timer queue

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⌛ Trying commit 91f653b with merge 2a26fdd…

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Auto merge of #143013 - bjorn3:split_exported_symbols, r=<try>
2a26fdd 
Split exported_symbols for generic and non-generic symbols

This reduces metadata decoder overhead during the monomorphization collector.

This may help with incremental builds for Zed.
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rust-bors bot commented Jun 26, 2025

☀️ Try build successful (CI)
Build commit: 2a26fdd (2a26fdd4b88032152a5497a8b20c6ce91002c8c1, parent: 1e838527f18cd24c81547ce6fbef6815032a80a7)

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Finished benchmarking commit (2a26fdd): comparison URL.

Overall result: ✅ improvements - no action needed

Benchmarking this pull request means it may be perf-sensitive – we'll automatically label it not fit for rolling up. You can override this, but we strongly advise not to, due to possible changes in compiler perf.

@bors rollup=never
@rustbot label: -S-waiting-on-perf -perf-regression

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

mean range count
Regressions ❌
(primary)		 - - 0
Regressions ❌
(secondary)		 - - 0
Improvements ✅
(primary)		 -0.3% [-0.4%, -0.3%] 2
Improvements ✅
(secondary)		 -0.2% [-0.2%, -0.2%] 1
All ❌✅ (primary) -0.3% [-0.4%, -0.3%] 2

Max RSS (memory usage)

Results (primary 4.3%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

mean range count
Regressions ❌
(primary)		 4.3% [1.6%, 7.0%] 2
Regressions ❌
(secondary)		 - - 0
Improvements ✅
(primary)		 - - 0
Improvements ✅
(secondary)		 - - 0
All ❌✅ (primary) 4.3% [1.6%, 7.0%] 2

Cycles

This benchmark run did not return any relevant results for this metric.

Binary size

Results (secondary 0.0%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

mean range count
Regressions ❌
(primary)		 - - 0
Regressions ❌
(secondary)		 0.0% [0.0%, 0.0%] 3
Improvements ✅
(primary)		 - - 0
Improvements ✅
(secondary)		 - - 0
All ❌✅ (primary) - - 0

Bootstrap: 691.88s -> 691.293s (-0.08%)
Artifact size: 372.13 MiB -> 372.06 MiB (-0.02%)

@rustbot rustbot removed the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Jun 27, 2025
oli-obk
oli-obk reviewed Jun 27, 2025
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Split exported_symbols for generic and non-generic symbols
753c73a 
This reduces metadata decoder overhead during the monomorphization collector.
@bjorn3 bjorn3 force-pushed the split_exported_symbols branch from 91f653b to 753c73a Compare June 27, 2025 09:34
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oli-obk commented Jun 27, 2025

r? @oli-obk

@bors r+

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bors commented Jun 27, 2025

📌 Commit 753c73a has been approved by oli-obk

It is now in the queue for this repository.

@rustbot rustbot assigned oli-obk and unassigned lcnr Jun 27, 2025
@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Jun 27, 2025
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