Some perf experiments

[oli-obk]

r? @ghost

looking at regression from #99102 (comment)

[rustbot]

Some changes occurred to MIR optimizations

cc @rust-lang/wg-mir-opt

[oli-obk]

@bors try @rust-timer queue include=libc,bitmaps,many-assoc-items

[rust-timer]

Awaiting bors try build completion.

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

[bors]

⌛ Trying commit 2c9cd17 with merge 10d870608eaa08538f193fe3a636577d0660000b...

[bors]

☀️ Try build successful - checks-actions
Build commit: 10d870608eaa08538f193fe3a636577d0660000b (10d870608eaa08538f193fe3a636577d0660000b)

[lqd]

the perf bot has probably lost this one ?!

[oli-obk]

@rust-timer build 10d870608eaa08538f193fe3a636577d0660000b

[rust-timer]

Queued 10d870608eaa08538f193fe3a636577d0660000b with parent 4af35b8, future comparison URL.

[rust-timer]

Finished benchmarking commit (10d870608eaa08538f193fe3a636577d0660000b): comparison URL.

Overall result: no relevant changes - 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-review -S-waiting-on-perf -perf-regression

Instruction count

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

Max RSS (memory usage)

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

Cycles

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

[oli-obk]

That was fast ?!

[bugadani]

"No results" on the comparison page.

[oli-obk]

I expanded the view, they are all too small to be shown. But if you select "Show non-relevant results" you'll get more data

[bugadani]

Oh I thought nothing ran 😅

[lqd]

These 3 benchmarks are pretty quick to run and the queue was empty :)

[Mark-Simulacrum]

#101561 (comment) included only a couple of benchmarks, though we should probably surface that on result completion too.