rustdoc: Remove cache for preprocessed markdown links

[petrochenkov]

It's quite possible that it's no longer useful after #94857 is merged.

[rustbot]

r? @GuillaumeGomez

(rustbot has picked a reviewer for you, use r? to override)

[petrochenkov]

@bors try @rust-timer queue

[bors]

⌛ Trying commit 0e61d3a with merge e192422dbbd78eb31bbd10cbc5ac1436d52b0f4c...

[bors]

☀️ Try build successful - checks-actions
Build commit: e192422dbbd78eb31bbd10cbc5ac1436d52b0f4c (e192422dbbd78eb31bbd10cbc5ac1436d52b0f4c)

[rust-timer]

Finished benchmarking commit (e192422dbbd78eb31bbd10cbc5ac1436d52b0f4c): comparison URL.

Overall result: ❌ regressions - ACTION NEEDED

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 may lead 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-perf +perf-regression

Instruction count

This is a highly reliable metric that was used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	1.1%	[1.1%, 1.1%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	1.1%	[1.1%, 1.1%]	1

Max RSS (memory usage)

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	2.6%	[1.3%, 3.9%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Cycles

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.5%	[-2.5%, -2.5%]	1
All ❌✅ (primary)	-	-	0

[petrochenkov]

I think we can land this.
This is a simplification, and after #94857 the cache should be hit rarely (as opposed to nearly 100% before #94857, if we exclude extern impls).
Apparently serde still hits it sometimes though.

[GuillaumeGomez]

I'm surprised there is an impact only for serde. Well, it's a nice code simplification so let's merge it.

@bors r+ rollup=iffy

[bors]

📌 Commit 0e61d3a has been approved by GuillaumeGomez

It is now in the queue for this repository.

[bors]

⌛ Testing commit 0e61d3a with merge 00cf19a...

[bors]

☀️ Test successful - checks-actions
Approved by: GuillaumeGomez
Pushing 00cf19a to master...

[rust-timer]

Finished benchmarking commit (00cf19a): comparison URL.

Overall result: ❌ regressions - ACTION NEEDED

Next Steps: If you can justify the regressions found in this perf run, please indicate this with @rustbot label: +perf-regression-triaged along with sufficient written justification. If you cannot justify the regressions please open an issue or create a new PR that fixes the regressions, add a comment linking to the newly created issue or PR, and then add the perf-regression-triaged label to this PR.

@rustbot label: +perf-regression
cc @rust-lang/wg-compiler-performance

Instruction count

This is a highly reliable metric that was used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	1.2%	[1.2%, 1.2%]	1
Regressions ❌ (secondary)	3.9%	[3.9%, 3.9%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	1.2%	[1.2%, 1.2%]	1

Max RSS (memory usage)

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	3.3%	[3.3%, 3.3%]	1
Improvements ✅ (primary)	-2.1%	[-3.2%, -1.1%]	2
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-2.1%	[-3.2%, -1.1%]	2

Cycles

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

[rylev]

Marking this as triaged since it was deemed acceptable above.

@rustbot label: perf-regression-triaged