Rollup of 3 pull requests

[matthiaskrgr]

Successful merges:

• Rename std::fs::try_exists to std::fs::exists and stabilize fs_try_exists #126140 (Rename std::fs::try_exists to std::fs::exists and stabilize fs_try_exists)
• Add a x perf command for integrating bootstrap with rustc-perf #126318 (Add a x perf command for integrating bootstrap with rustc-perf)
• Remove use of const traits (and feature(effects)) from stdlib #126552 (Remove use of const traits (and feature(effects)) from stdlib)

r? @ghost
@rustbot modify labels: rollup

Create a similar rollup

[matthiaskrgr]

@bors r+ rollup=never p=3

[bors]

📌 Commit dc9a08f has been approved by matthiaskrgr

It is now in the queue for this repository.

[bors]

⌛ Testing commit dc9a08f with merge a0f01c3...

[workingjubilee]

merged.

[bors]

☀️ Test successful - checks-actions
Approved by: matthiaskrgr
Pushing a0f01c3 to master...

[rust-timer]

📌 Perf builds for each rolled up PR:

PR#	Message	Perf Build Sha
#126140	Rename std::fs::try_exists to std::fs::exists and stab…	07e95a71376dcb9ae39f264b9f3880275233f626 (link)
#126318	Add a x perf command for integrating bootstrap with `rust…	63c59f7faeafe86e1ce782975982fecd64b5109f (link)
#126552	Remove use of const traits (and feature(effects)) from st…	7ba756ad7c2b63bc2aa77e2f8c8e03e9466b4c36 (link)

previous master: f944afe380

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 (a0f01c3): comparison URL.

Overall result: ✅ 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.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-0.4%	[-0.9%, -0.2%]	50
Improvements ✅ (secondary)	-0.4%	[-0.9%, -0.2%]	19
All ❌✅ (primary)	-0.4%	[-0.9%, -0.2%]	50

Max RSS (memory usage)

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

Cycles

Results (primary -0.5%)

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)	4.6%	[4.6%, 4.6%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-1.2%	[-1.5%, -0.6%]	8
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-0.5%	[-1.5%, 4.6%]	9

Binary size

Results (primary -0.1%, secondary -0.1%)

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)	-0.1%	[-0.6%, -0.0%]	27
Improvements ✅ (secondary)	-0.1%	[-0.1%, -0.0%]	7
All ❌✅ (primary)	-0.1%	[-0.6%, -0.0%]	27

Bootstrap: 694.429s -> 692.158s (-0.33%)
Artifact size: 326.84 MiB -> 326.67 MiB (-0.05%)