Make x.py work again in most (all?) cases

[albertlarsan68]

Fixes #111046.

Wrap all of x.py in if __name__ == '__main__': to avoid problems with multiprocessing
Make the pool sizing better

[rustbot]

r? @ozkanonur

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[jyn514]

@bors r+ rollup p=20 (fixes x on Windows)

[bors]

📌 Commit ee1446af10e4dfaa8718e5fae468452ecfbc8af6 has been approved by jyn514

It is now in the queue for this repository.

[jyn514]

😩

@bors r-

[albertlarsan68]

@bors r=jyn514

[bors]

📌 Commit 3011949 has been approved by jyn514

It is now in the queue for this repository.

[bors]

⌛ Testing commit 3011949 with merge dbba594...

[bors]

☀️ Test successful - checks-actions
Approved by: jyn514
Pushing dbba594 to master...

[rust-timer]

Finished benchmarking commit (dbba594): comparison URL.

Overall result: no relevant changes - no action needed

@rustbot label: -perf-regression

Instruction count

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

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)	2.1%	[2.1%, 2.1%]	1
Regressions ❌ (secondary)	0.9%	[0.9%, 1.0%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	2.1%	[2.1%, 2.1%]	1

Cycles

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

Binary size

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

Bootstrap: 656.548s -> 656.457s (-0.01%)