Update minifier version to 0.2.2

[GuillaumeGomez]

Following this PR, the CSS minification should be much faster now (thanks to @nnethercote).

r? @nnethercote

[nnethercote]

Let's do a perf run to check:

@bors try @rust-timer queue

It's possible that the instruction counts will barely change. This is because memcpy is usually implemented using REP MOVSB on x86-64, which perf counts as a single instruction no matter how many bytes it copies. And this PR will avoid a relatively small number of memcpy calls that copy a lot of data.

If this is the case, hopefully the cycle counts will still be improved, which is the more important result.

[rust-timer]

Awaiting bors try build completion.

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

[bors]

⌛ Trying commit fb62f28 with merge a151ad6a4a6c2f42b1881c8b1bfeef4218fa3f1f...

[bors]

☀️ Try build successful - checks-actions
Build commit: a151ad6a4a6c2f42b1881c8b1bfeef4218fa3f1f (a151ad6a4a6c2f42b1881c8b1bfeef4218fa3f1f)

[rust-timer]

Queued a151ad6a4a6c2f42b1881c8b1bfeef4218fa3f1f with parent 14a459b, future comparison URL.

[rust-timer]

Finished benchmarking commit (a151ad6a4a6c2f42b1881c8b1bfeef4218fa3f1f): comparison url.

Instruction count

• Primary benchmarks: ✅ relevant improvements found
• Secondary benchmarks: ✅ relevant improvements found

( )	mean1	max	count2
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-0.6%	-1.7%	14
Improvements ✅ (secondary)	-1.1%	-1.7%	23
All ❌✅ (primary)	-0.6%	-1.7%	14

Max RSS (memory usage)

Results

• Primary benchmarks: ❌ relevant regression found
• Secondary benchmarks: mixed results

( )	mean1	max	count2
Regressions ❌ (primary)	2.9%	2.9%	1
Regressions ❌ (secondary)	3.3%	3.3%	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-1.2%	-1.2%	1
All ❌✅ (primary)	2.9%	2.9%	1

Cycles

Results

• Primary benchmarks: ❌ relevant regression found
• Secondary benchmarks: no relevant changes found

( )	mean1	max	count2
Regressions ❌ (primary)	3.4%	3.4%	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	3.4%	3.4%	1

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 may lead to changes in compiler perf.

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

Footnotes

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

2. number of relevant changes ↩ ↩² ↩³

[GuillaumeGomez]

The result isn't great for memory usage and cycles.

[notriddle]

Memory usage and cycles are pretty noisy. That's why instruction count is shown by default.

[nnethercote]

Yes, the cycles and max-rss results look either neutral, or changes are too small to be detected within the noise. But instruction counts improved. A little surprising, but overall a good result. Thank you for filing the PR!

@bors r+

[bors]

📌 Commit fb62f28 has been approved by nnethercote

It is now in the queue for this repository.

[bors]

⌛ Testing commit fb62f28 with merge aa8e761...

[bors]

☀️ Test successful - checks-actions
Approved by: nnethercote
Pushing aa8e761 to master...

[rust-timer]

Finished benchmarking commit (aa8e761): comparison url.

Instruction count

• Primary benchmarks: ✅ relevant improvements found
• Secondary benchmarks: ✅ relevant improvements found

	mean1	max	count2
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-0.6%	-1.6%	13
Improvements ✅ (secondary)	-1.1%	-1.5%	20
All ❌✅ (primary)	-0.6%	-1.6%	13

Max RSS (memory usage)

Results

• Primary benchmarks: no relevant changes found
• Secondary benchmarks: mixed results

	mean1	max	count2
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	3.1%	3.1%	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-1.8%	-1.8%	2
All ❌✅ (primary)	-	-	0

Cycles

Results

• Primary benchmarks: mixed results
• Secondary benchmarks: no relevant changes found

	mean1	max	count2
Regressions ❌ (primary)	3.0%	3.0%	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-2.7%	-2.8%	2
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-0.8%	3.0%	3

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

@rustbot label: -perf-regression

Footnotes

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

2. number of relevant changes ↩ ↩² ↩³