Rollup of 5 pull requests

[matthiaskrgr]

Successful merges:

• Documentation BTreeMap::append's behavior for already existing keys #103087 (Documentation BTreeMap::append's behavior for already existing keys)
• Mark derived StructuralEq as automatically derived. #103089 (Mark derived StructuralEq as automatically derived.)
• Clarify the possible return values of len_utf16 #103102 (Clarify the possible return values of len_utf16)
• PhantomData: inline a macro that is used only once #103109 (PhantomData: inline a macro that is used only once)
• rustdoc: Do not expect doc(primitive) modules to always exist #103120 (rustdoc: Do not expect doc(primitive) modules to always exist)

Failed merges:

r? @ghost
@rustbot modify labels: rollup

Create a similar rollup

[matthiaskrgr]

@bors r+ rollup=never p=5

[bors]

📌 Commit db30a25 has been approved by matthiaskrgr

It is now in the queue for this repository.

[bors]

⌛ Testing commit db30a25 with merge a501e66...

[bors]

☀️ Test successful - checks-actions
Approved by: matthiaskrgr
Pushing a501e66 to master...

[rust-timer]

📌 Perf builds for each rolled up PR:

PR#	Perf Build Sha
#103120	32aebfc970530b98e5497680c0e44f307731d672
#103109	2ee7f46bd04e918eeb16b70858bcecccee84b7a3
#103102	301e6c99ae20d5d4bec1dadb560e97b9ec38c557
#103089	7d743f5d45b8aef5dd8e0a4e43b8ba88ef6746ef
#103087	4e1d69eda03d0a8a0bf951b1fd319ab30f482645

previous master: b8b5caee04

In the case of a perf regression, run the following command for each PR you suspect might be the cause: @rust-timer build $SHA

[rust-timer]

Finished benchmarking commit (a501e66): comparison URL.

Overall result: ❌✅ regressions and improvements - no action needed

@rustbot label: -perf-regression

Instruction count

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

	mean1	range	count2
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.3%	[0.1%, 0.5%]	5
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.0%	[-2.0%, -2.0%]	1
All ❌✅ (primary)	-	-	0

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.

	mean1	range	count2
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	4.5%	[4.5%, 4.5%]	1
Improvements ✅ (primary)	-0.5%	[-0.5%, -0.5%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-0.5%	[-0.5%, -0.5%]	1

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.

	mean1	range	count2
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	2.8%	[2.8%, 2.8%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Footnotes

1. the arithmetic mean of the percent change ↩ ↩² ↩³

2. number of relevant changes ↩ ↩² ↩³