[j178]

Reuse successful Bun and Deno version queries when hook environments share an executable. Keep failed queries retryable through the existing OnceMap.

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[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-30T07:59:55.905977Z	1f460ef	New commits

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Codex reacts with 👀 while any review is running, comments if it has suggestions, and reacts with 👍 once all reviews finish with no findings.

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: f91df6017e

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.27%. Comparing base (c80c853) to head (1f460ef).
⚠️ Report is 8 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2795      +/-   ##
==========================================
+ Coverage   94.26%   94.27%   +0.01%     
==========================================
  Files         142      142              
  Lines       30743    30837      +94     
==========================================
+ Hits        28980    29072      +92     
- Misses       1763     1765       +2     

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[prek-ci-bot]

📦 Cargo Bloat Comparison

.text size change: +0.78% (12.8 MiB → 12.9 MiB)

Expand for cargo-bloat output

Head Branch Results

File  .text     Size             Crate Name
0.1%   2.5% 332.0KiB        aws_lc_sys aws_lc_0_45_0_aes_gcm_encrypt_avx512
0.1%   2.5% 332.0KiB        aws_lc_sys aws_lc_0_45_0_aes_gcm_decrypt_avx512
0.0%   0.7%  96.5KiB              prek <prek::cli::Command as clap_builder::derive::Subcommand>::augment_subcommands
0.0%   0.4%  49.8KiB              prek <<prek::config::hook::HookWire as serde_core::de::Deserialize>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map::<&mut <serde_saphyr::de::deserializer::YamlDeserializer as serde_core::de::Deserializer>::deserialize_map::MA>
0.0%   0.4%  48.7KiB annotate_snippets annotate_snippets::renderer::render::render
0.0%   0.4%  46.7KiB              prek <<prek::config::Config as serde_core::de::Deserialize>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map::<&mut <serde_saphyr::de::deserializer::YamlDeserializer as serde_core::de::Deserializer>::deserialize_map::MA>
0.0%   0.3%  43.4KiB              prek prek::run::{closure#0}
0.0%   0.3%  41.8KiB              prek <prek::cli::RunOptions as clap_builder::derive::Args>::augment_args
0.0%   0.3%  33.9KiB              prek <prek::languages::rust::rust::Rust as prek::languages::LanguageBackend>::install::{closure#0}
0.0%   0.2%  29.1KiB      serde_saphyr <granit_parser::scanner::Scanner<granit_parser::input::str::StrInput>>::fetch_more_tokens
0.0%   0.2%  28.8KiB              prek prek::archive::unpack::<fs_err::tokio::file::File, &std::path::PathBuf>::{closure#0}
0.0%   0.2%  28.0KiB              toml <toml::de::deserializer::value::ValueDeserializer as serde_core::de::Deserializer>::deserialize_any::<<prek::config::hook::HookWire as serde_core::de::Deserialize>::deserialize::__Visitor>
0.0%   0.2%  28.0KiB        aws_lc_sys aws_lc_0_45_0_edwards25519_scalarmuldouble_alt
0.0%   0.2%  27.5KiB        aws_lc_sys aws_lc_0_45_0_edwards25519_scalarmuldouble
0.0%   0.2%  27.1KiB              prek prek::archive::unpack::<fs_err::tokio::file::File, &std::path::PathBuf>::{closure#0}
0.0%   0.2%  27.0KiB              prek prek::archive::unpack::<fs_err::tokio::file::File, &std::path::PathBuf>::{closure#0}
0.0%   0.2%  27.0KiB              prek prek::archive::unpack::<fs_err::tokio::file::File, &std::path::PathBuf>::{closure#0}
0.0%   0.2%  27.0KiB              prek prek::archive::unpack::<fs_err::tokio::file::File, &std::path::PathBuf>::{closure#0}
0.0%   0.2%  26.9KiB              prek prek::archive::unpack::<fs_err::tokio::file::File, &std::path::PathBuf>::{closure#0}
0.0%   0.2%  26.8KiB              prek prek::archive::unpack::<fs_err::tokio::file::File, &std::path::PathBuf>::{closure#0}
4.1%  87.1%  11.2MiB                   And 20663 smaller methods. Use -n N to show more.
4.7% 100.0%  12.9MiB                   .text section size, the file size is 275.2MiB

Base Branch Results

File  .text     Size             Crate Name
0.1%   2.5% 332.0KiB        aws_lc_sys aws_lc_0_45_0_aes_gcm_encrypt_avx512
0.1%   2.5% 332.0KiB        aws_lc_sys aws_lc_0_45_0_aes_gcm_decrypt_avx512
0.0%   0.7%  88.6KiB              prek <prek::cli::Command as clap_builder::derive::Subcommand>::augment_subcommands
0.0%   0.4%  49.8KiB              prek <<prek::config::hook::HookWire as serde_core::de::Deserialize>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map::<&mut <serde_saphyr::de::deserializer::YamlDeserializer as serde_core::de::Deserializer>::deserialize_map::MA>
0.0%   0.4%  48.7KiB annotate_snippets annotate_snippets::renderer::render::render
0.0%   0.4%  46.7KiB              prek <<prek::config::Config as serde_core::de::Deserialize>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map::<&mut <serde_saphyr::de::deserializer::YamlDeserializer as serde_core::de::Deserializer>::deserialize_map::MA>
0.0%   0.3%  39.2KiB              prek prek::run::{closure#0}
0.0%   0.3%  38.8KiB              prek prek::cli::run::run::run::{closure#0}
0.0%   0.2%  30.6KiB              prek <prek::languages::rust::rust::Rust as prek::languages::LanguageBackend>::install::{closure#0}
0.0%   0.2%  29.8KiB              prek <prek::cli::RunOptions as clap_builder::derive::Args>::augment_args
0.0%   0.2%  29.1KiB      serde_saphyr <granit_parser::scanner::Scanner<granit_parser::input::str::StrInput>>::fetch_more_tokens
0.0%   0.2%  28.0KiB              toml <toml::de::deserializer::value::ValueDeserializer as serde_core::de::Deserializer>::deserialize_any::<<prek::config::hook::HookWire as serde_core::de::Deserialize>::deserialize::__Visitor>
0.0%   0.2%  28.0KiB        aws_lc_sys aws_lc_0_45_0_edwards25519_scalarmuldouble_alt
0.0%   0.2%  27.6KiB              prek prek::archive::unpack::<fs_err::tokio::file::File, &std::path::PathBuf>::{closure#0}
0.0%   0.2%  27.5KiB        aws_lc_sys aws_lc_0_45_0_edwards25519_scalarmuldouble
0.0%   0.2%  27.2KiB              prek prek::archive::unpack::<fs_err::tokio::file::File, &std::path::PathBuf>::{closure#0}
0.0%   0.2%  27.1KiB              prek prek::archive::unpack::<fs_err::tokio::file::File, &std::path::PathBuf>::{closure#0}
0.0%   0.2%  27.1KiB              prek prek::archive::unpack::<fs_err::tokio::file::File, &std::path::PathBuf>::{closure#0}
0.0%   0.2%  27.0KiB              prek prek::archive::unpack::<fs_err::tokio::file::File, &std::path::PathBuf>::{closure#0}
0.0%   0.2%  27.0KiB              prek prek::archive::unpack::<fs_err::tokio::file::File, &std::path::PathBuf>::{closure#0}
4.1%  87.1%  11.2MiB                   And 20631 smaller methods. Use -n N to show more.
4.7% 100.0%  12.8MiB                   .text section size, the file size is 274.2MiB

[prek-ci-bot]

⚡️ Hyperfine Benchmarks

Summary: 5 regressions, 10 improvements above the 10% threshold.

Environment

• OS: Linux 6.17.0-1022-azure
• CPU: 4 cores
• prek version: prek 0.5.4+16 (de03f15 2026-09-30)
• Rust version: rustc 1.98.1 (48a229cea 2026-09-01)
• Hyperfine version: hyperfine 1.20.0

CLI Commands

Benchmarking basic commands in the main repo:

prek --version

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base --version	1.9 ± 0.1	1.8	2.7	1.00 ± 0.08
prek-head --version	1.9 ± 0.1	1.8	2.5	1.00

prek list

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base list	13.7 ± 26.1	8.0	213.8	1.37 ± 3.79
prek-head list	10.0 ± 20.0	7.2	207.5	1.00

✅ Performance improvement for prek list: 27.1000% faster

prek validate-config .pre-commit-config.yaml

⏭️ Skipped: .pre-commit-config.yaml not found

prek sample-config

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base sample-config	3.6 ± 8.7	2.2	63.7	1.42 ± 3.59
prek-head sample-config	2.5 ± 1.6	2.2	13.7	1.00

✅ Performance improvement for prek sample-config: 29.8100% faster

Cold vs Warm Runs

Comparing first run (cold) vs subsequent runs (warm cache):

prek run --all-files (cold - no cache)

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run --all-files	15.5 ± 0.8	14.9	17.7	1.03 ± 0.06
prek-head run --all-files	15.1 ± 0.2	14.8	15.5	1.00

prek run --all-files (warm - with cache)

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run --all-files	15.3 ± 0.3	14.8	15.9	1.00
prek-head run --all-files	15.5 ± 0.3	15.1	16.2	1.01 ± 0.03

Full Hook Suite

Running the builtin hook suite on the benchmark workspace:

prek run --all-files (full builtin hook suite)

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run --all-files	16.0 ± 0.4	15.2	17.1	1.00
prek-head run --all-files	16.9 ± 8.8	14.7	78.1	1.06 ± 0.55

Individual Hook Performance

Benchmarking each hook individually on the test repo:

prek run trailing-whitespace --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run trailing-whitespace --all-files	8.0 ± 0.2	7.6	8.7	1.00 ± 0.03
prek-head run trailing-whitespace --all-files	8.0 ± 0.2	7.7	8.3	1.00

prek run end-of-file-fixer --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run end-of-file-fixer --all-files	13.0 ± 22.2	7.2	120.5	1.63 ± 2.85
prek-head run end-of-file-fixer --all-files	8.0 ± 2.9	7.1	23.5	1.00

✅ Performance improvement for prek run end-of-file-fixer --all-files: 38.5600% faster

prek run check-json --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-json --all-files	8.6 ± 7.5	6.4	37.3	1.00
prek-head run check-json --all-files	17.7 ± 40.7	6.2	213.0	2.06 ± 5.07

⚠️ Warning: Performance regression for prek run check-json --all-files: 106.1500% slower

prek run check-yaml --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-yaml --all-files	10.8 ± 17.5	6.6	100.7	1.60 ± 2.60
prek-head run check-yaml --all-files	6.8 ± 0.1	6.5	7.0	1.00

✅ Performance improvement for prek run check-yaml --all-files: 37.3100% faster

prek run check-toml --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-toml --all-files	7.6 ± 4.7	6.5	32.7	1.13 ± 0.71
prek-head run check-toml --all-files	6.7 ± 0.2	6.4	7.2	1.00

✅ Performance improvement for prek run check-toml --all-files: 11.7200% faster

prek run check-xml --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-xml --all-files	9.2 ± 12.0	6.4	72.7	1.36 ± 1.78
prek-head run check-xml --all-files	6.8 ± 0.4	6.5	8.8	1.00

✅ Performance improvement for prek run check-xml --all-files: 26.2600% faster

prek run detect-private-key --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run detect-private-key --all-files	7.2 ± 0.4	6.9	9.4	1.00
prek-head run detect-private-key --all-files	7.2 ± 0.4	6.8	9.1	1.00 ± 0.08

prek run fix-byte-order-marker --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run fix-byte-order-marker --all-files	7.5 ± 1.3	6.9	14.1	1.00
prek-head run fix-byte-order-marker --all-files	11.7 ± 13.1	6.9	57.7	1.55 ± 1.76

⚠️ Warning: Performance regression for prek run fix-byte-order-marker --all-files: 55.4100% slower

Installation Performance

Benchmarking hook installation (fast path hooks skip Python setup):

prek install-hooks (cold - no cache)

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base install-hooks	4.5 ± 0.1	4.5	4.7	1.00
prek-head install-hooks	7.4 ± 4.1	4.4	13.0	1.62 ± 0.91

⚠️ Warning: Performance regression for prek install-hooks (cold - no cache): 62.0300% slower

prek install-hooks (warm - with cache)

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base install-hooks	22.2 ± 39.1	4.6	92.0	1.68 ± 3.52
prek-head install-hooks	13.2 ± 14.9	4.5	39.0	1.00

✅ Performance improvement for prek install-hooks (warm - with cache): 40.5700% faster

File Filtering/Scoping Performance

Testing different file selection modes:

prek run (staged files only)

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run	19.3 ± 7.2	17.3	50.0	1.68 ± 0.63
prek-head run	11.5 ± 0.2	11.0	12.0	1.00

✅ Performance improvement for prek run (staged files only): 40.4800% faster

prek run --files '*.json' (specific file type)

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run --files '*.json'	11.2 ± 26.8	5.0	124.9	2.20 ± 5.24
prek-head run --files '*.json'	5.1 ± 0.2	4.9	5.6	1.00

✅ Performance improvement for prek run --files '*.json' (specific file type): 54.4800% faster

Workspace Discovery & Initialization

Benchmarking hook discovery and initialization overhead:

prek run --dry-run --all-files (measures init overhead)

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run --dry-run --all-files	6.8 ± 0.4	6.5	8.3	1.03 ± 0.06
prek-head run --dry-run --all-files	6.6 ± 0.1	6.4	6.8	1.00

Meta Hooks Performance

Benchmarking meta hooks separately:

prek run check-hooks-apply --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-hooks-apply --all-files	7.9 ± 0.1	7.8	8.1	1.00
prek-head run check-hooks-apply --all-files	23.1 ± 40.4	7.8	154.4	2.92 ± 5.10

⚠️ Warning: Performance regression for prek run check-hooks-apply --all-files: 191.5200% slower

prek run check-useless-excludes --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-useless-excludes --all-files	11.1 ± 10.9	7.4	50.3	1.40 ± 1.39
prek-head run check-useless-excludes --all-files	7.9 ± 1.0	7.3	11.5	1.00

✅ Performance improvement for prek run check-useless-excludes --all-files: 28.6700% faster

prek run identity --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run identity --all-files	6.9 ± 0.2	6.6	7.3	1.00
prek-head run identity --all-files	7.8 ± 3.1	6.8	19.1	1.13 ± 0.45

⚠️ Warning: Performance regression for prek run identity --all-files: 12.6400% slower

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