Optimize TokenKind::clone.

[nnethercote]

TokenKind would impl Copy if it weren't for
TokenKind::Interpolated. This commit makes clone reflect that.

r? @ghost

[nnethercote]

@bors try @rust-timer queue

[bors]

⌛ Trying commit ac747a8 with merge 2263ecc3c2223a6f1344b018760c87ac8c887c7d...

[bors]

☀️ Try build successful - checks-actions
Build commit: 2263ecc3c2223a6f1344b018760c87ac8c887c7d (2263ecc3c2223a6f1344b018760c87ac8c887c7d)

[rust-timer]

Finished benchmarking commit (2263ecc3c2223a6f1344b018760c87ac8c887c7d): comparison URL.

Overall result: ✅ improvements - no 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.

@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)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-0.8%	[-1.5%, -0.2%]	15
Improvements ✅ (secondary)	-0.8%	[-1.6%, -0.3%]	14
All ❌✅ (primary)	-0.8%	[-1.5%, -0.2%]	15

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)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.6%	[-2.6%, -2.6%]	1
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)	5.9%	[3.4%, 8.9%]	10
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Binary size

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

Bootstrap: 653.837s -> 652.527s (-0.20%)

[nnethercote]

icounts look good. But cycles and walltime are up for tt-muncher, which is the benchmark with the best icount results. That's surprising, it seems like this should be a straightforward win for all metrics, the new clone code is just simpler than the old code.

@petrochenkov, what do you think? This is me trying to get part of the win we'd get if we could make Token impl Copy (#96764). Do you think this is too gross for words?

r? @petrochenkov

[petrochenkov]

Do you think this is too gross for words?

Seems fine to me.
@bors r+

[bors]

📌 Commit ac747a8 has been approved by petrochenkov

It is now in the queue for this repository.

[bors]

⌛ Testing commit ac747a8 with merge b95fd85...

[bors]

☀️ Test successful - checks-actions
Approved by: petrochenkov
Pushing b95fd85 to master...

[rust-timer]

Finished benchmarking commit (b95fd85): 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)	-1.0%	[-1.5%, -0.5%]	10
Improvements ✅ (secondary)	-0.7%	[-1.0%, -0.3%]	7
All ❌✅ (primary)	-1.0%	[-1.5%, -0.5%]	10

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)	2.2%	[0.9%, 3.1%]	3
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.2%	[-3.0%, -1.5%]	5
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)	5.8%	[3.1%, 8.9%]	11
Improvements ✅ (primary)	-2.0%	[-2.1%, -2.0%]	2
Improvements ✅ (secondary)	-3.1%	[-3.6%, -2.9%]	5
All ❌✅ (primary)	-2.0%	[-2.1%, -2.0%]	2

Binary size

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

Bootstrap: 651.8s -> 650.875s (-0.14%)