Use a HashMap for UniverseInfo in mir borrowck

[jackh726]

Fixes #88446

r? @nikomatsakis

[jackh726]

@bors try @rust-timer queue

[rust-timer]

Awaiting bors try build completion.

@rustbot label: +S-waiting-on-perf

[bors]

⌛ Trying commit 47035e4 with merge c85285459be3d592ede0cbcf9437bf96581ce47e...

[bors]

☀️ Try build successful - checks-actions
Build commit: c85285459be3d592ede0cbcf9437bf96581ce47e (c85285459be3d592ede0cbcf9437bf96581ce47e)

[rust-timer]

Queued c85285459be3d592ede0cbcf9437bf96581ce47e with parent 497ee32, future comparison URL.

[rust-timer]

Finished benchmarking commit (c85285459be3d592ede0cbcf9437bf96581ce47e): comparison url.

Summary: This change led to small relevant regressions 😿 in compiler performance.

• Small regression in instruction counts (up to 0.4% on incr-full builds of html5ever)

If you disagree with this performance assessment, please file an issue in rust-lang/rustc-perf.

Benchmarking this pull request likely means that it is perf-sensitive, so we're automatically marking it as not fit for rolling up. While you can manually mark this PR as fit for rollup, we strongly recommend not doing so since this PR led to changes in compiler perf.

Next Steps: If you can justify the regressions found in this try perf run, please indicate this with @rustbot label: +perf-regression-triaged along with sufficient written justification. If you cannot justify the regressions please fix the regressions and do another perf run. If the next run shows neutral or positive results, the label will be automatically removed.

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

[nikomatsakis]

@bors r+

[bors]

📌 Commit 47035e4 has been approved by nikomatsakis

[bors]

🌲 The tree is currently closed for pull requests below priority 100. This pull request will be tested once the tree is reopened.

[bors]

⌛ Testing commit 47035e4 with merge d2dfb0e...

[bors]

☀️ Test successful - checks-actions
Approved by: nikomatsakis
Pushing d2dfb0e to master...

[rust-timer]

Finished benchmarking commit (d2dfb0e): comparison url.

Summary: This benchmark run did not return any relevant changes.

If you disagree with this performance assessment, please file an issue in rust-lang/rustc-perf.

@rustbot label: -perf-regression