[perf] Fast path for WF goals in new solver

[compiler-errors]

I'll clean this up obviously, but I don't want to do that if this is worthless.

[compiler-errors]

@bors2 try @rust-timer queue

[rust-bors]

⌛ Trying commit d5c1103 with merge d011188…

To cancel the try build, run the command @bors2 try cancel.

[rust-bors]

☀️ Try build successful (CI)
Build commit: d011188 (d011188561dc551d4a27a354ded5e031978279fa)

[rust-timer]

Finished benchmarking commit (d011188): comparison URL.

Overall result: ✅ improvements - no action needed

Benchmarking this pull request means it may be perf-sensitive – we'll automatically label it not fit for rolling up. You can override this, but we strongly advise not to, due to possible changes in compiler perf.

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

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.6%	[-5.4%, -0.2%]	13
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (secondary -5.2%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-5.2%	[-13.6%, -1.0%]	4
All ❌✅ (primary)	-	-	0

Cycles

Results (secondary -3.6%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-3.6%	[-4.1%, -2.7%]	6
All ❌✅ (primary)	-	-	0

Binary size

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

Bootstrap: 751.176s -> 750.294s (-0.12%)
Artifact size: 372.27 MiB -> 372.18 MiB (-0.02%)

[compiler-errors]

@bors2 try @rust-timer queue

[rust-bors]

⌛ Trying commit ec2a6d1 with merge e484b4d…

To cancel the try build, run the command @bors2 try cancel.

[rust-bors]

☀️ Try build successful (CI)
Build commit: e484b4d (e484b4dd6e21a71897157fc93c007fa79379dbf6)

[rust-timer]

Finished benchmarking commit (e484b4d): comparison URL.

Overall result: ✅ improvements - no action needed

Benchmarking this pull request means it may be perf-sensitive – we'll automatically label it not fit for rolling up. You can override this, but we strongly advise not to, due to possible changes in compiler perf.

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

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-1.5%	[-1.5%, -1.5%]	1
Improvements ✅ (secondary)	-2.2%	[-5.0%, -0.2%]	15
All ❌✅ (primary)	-1.5%	[-1.5%, -1.5%]	1

Max RSS (memory usage)

Results (primary 2.1%, secondary -1.0%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	5.8%	[5.8%, 5.8%]	1
Regressions ❌ (secondary)	3.0%	[1.2%, 4.5%]	4
Improvements ✅ (primary)	-1.5%	[-1.5%, -1.5%]	1
Improvements ✅ (secondary)	-5.1%	[-14.1%, -0.9%]	4
All ❌✅ (primary)	2.1%	[-1.5%, 5.8%]	2

Cycles

Results (primary -1.5%, secondary -2.9%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-1.5%	[-1.5%, -1.5%]	1
Improvements ✅ (secondary)	-2.9%	[-3.6%, -1.6%]	7
All ❌✅ (primary)	-1.5%	[-1.5%, -1.5%]	1

Binary size

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

Bootstrap: 753.531s -> 754.864s (0.18%)
Artifact size: 372.34 MiB -> 372.30 MiB (-0.01%)