[EXPERIMENT] Avoid tracking span to compute end_point.

[cjgillot]

This is probably unsound.

r? @ghost

[cjgillot]

@bors try @rust-timer queue

[rust-bors]

⌛ Trying commit 08260ee with merge 011760c…

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

[rust-bors]

☀️ Try build successful (CI)
Build commit: 011760c (011760cd4180ae139029f20eaecf7df105637779, parent: 0060d5a2a8a86a31f6299311fe64b1d755a91c4f)

[rust-timer]

Finished benchmarking commit (011760c): 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)	0.1%	[0.1%, 0.1%]	2
Improvements ✅ (primary)	-0.3%	[-0.5%, -0.1%]	19
Improvements ✅ (secondary)	-0.4%	[-0.8%, -0.1%]	21
All ❌✅ (primary)	-0.3%	[-0.5%, -0.1%]	19

Max RSS (memory usage)

Results (primary 0.9%, secondary 0.1%)

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

	mean	range	count
Regressions ❌ (primary)	2.7%	[1.0%, 4.3%]	2
Regressions ❌ (secondary)	2.4%	[2.4%, 2.4%]	1
Improvements ✅ (primary)	-2.7%	[-2.7%, -2.7%]	1
Improvements ✅ (secondary)	-2.1%	[-2.1%, -2.1%]	1
All ❌✅ (primary)	0.9%	[-2.7%, 4.3%]	3

Cycles

Results (primary 2.2%, secondary 11.6%)

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

	mean	range	count
Regressions ❌ (primary)	2.2%	[2.2%, 2.2%]	1
Regressions ❌ (secondary)	15.3%	[3.5%, 21.1%]	4
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-3.1%	[-3.1%, -3.1%]	1
All ❌✅ (primary)	2.2%	[2.2%, 2.2%]	1

Binary size

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

Bootstrap: 466.337s -> 468.604s (0.49%)
Artifact size: 376.97 MiB -> 376.99 MiB (0.00%)