WIP: Try custom index types for indexmap

[cuviper]

Looking for real-world results on indexmap-rs/indexmap#147.

r? @ghost

[cuviper]

@bors try @rust-timer queue

[rust-timer]

Awaiting bors try build completion.

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

[bors]

⌛ Trying commit 570bbc5 with merge bfca2502fef9bf25cd9fd78f452f800447ad46ef...

[bors]

☀️ Try build successful - checks-actions
Build commit: bfca2502fef9bf25cd9fd78f452f800447ad46ef (bfca2502fef9bf25cd9fd78f452f800447ad46ef)

[rust-timer]

Queued bfca2502fef9bf25cd9fd78f452f800447ad46ef with parent 30f3860, future comparison URL.

[rust-log-analyzer]

The job mingw-check failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

    Checking petgraph v0.5.1
    Checking gimli v0.26.1
    Checking object v0.28.1
    Checking tempfile v3.2.0
    Checking indexmap v2.0.0-pre (https://github.com/cuviper/indexmap?branch=indexable#3b6d807f)
    Checking synstructure v0.12.6
    Checking rustc_macros v0.1.0 (/checkout/compiler/rustc_macros)
   Compiling tracing-attributes v0.1.18
   Compiling unic-langid-macros-impl v0.9.0
---
configure: rust.debug-assertions := True
configure: rust.overflow-checks := True
configure: llvm.assertions      := True
configure: dist.missing-tools   := True
configure: build.configure-args := ['--enable-sccache', '--disable-manage-submodu ...
configure: writing `config.toml` in current directory
configure: 
configure: run `python /checkout/x.py --help`
configure: 
---
    Checking unic-ucd-version v0.9.0
   Compiling generic-array v0.14.4
   Compiling ahash v0.7.4
   Compiling unic-langid-impl v0.9.0
    Checking indexmap v2.0.0-pre (https://github.com/cuviper/indexmap?branch=indexable#3b6d807f)
    Checking thread_local v1.1.4
    Checking miniz_oxide v0.4.0
    Checking unicode-normalization v0.1.13
    Checking expect-test v1.0.1
---
   Compiling tidy v0.1.0 (/checkout/src/tools/tidy)
    Finished release [optimized] target(s) in 6.94s
tidy check
tidy: Skipping binary file check, read-only filesystem
tidy error: invalid source: "git+https://github.com/cuviper/indexmap?branch=indexable#3b6d807f460308e6de30cd34f9516aca624615f2"
* 629 error codes
* highest error code: E0787
Found 504 error codes
Found 0 error(s) in error codes

[rust-timer]

Finished benchmarking commit (bfca2502fef9bf25cd9fd78f452f800447ad46ef): comparison url.

Summary:

• Primary benchmarks: 🎉 relevant improvements found
• Secondary benchmarks: mixed results

	Regressions 😿 (primary)	Regressions 😿 (secondary)	Improvements 🎉 (primary)	Improvements 🎉 (secondary)	All 😿 🎉 (primary)
count1	0	1	10	9	10
mean2	N/A	1.7%	-0.5%	-0.5%	-0.5%
max	N/A	1.7%	-0.7%	-0.6%	-0.7%

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. number of relevant changes ↩

2. the arithmetic mean of the percent change ↩