Preserve hook output order with a shared pipe by j178 · Pull Request #2385 · j178/prek · GitHub

Fix hook output ordering by capturing stdout and stderr through a shared pipe before spawning the process. Centralize merged batch output handling across language backends.

Closes #2382

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📦 Cargo Bloat Comparison

Binary size change: -0.34% (29.2 MiB → 29.1 MiB)

Expand for cargo-bloat output

Head Branch Results

 File  .text     Size             Crate Name
 1.1%   2.3% 332.0KiB        aws_lc_sys aws_lc_0_42_0_aes_gcm_encrypt_avx512
 1.1%   2.3% 332.0KiB        aws_lc_sys aws_lc_0_42_0_aes_gcm_decrypt_avx512
 0.2%   0.5%  65.2KiB              prek <prek::cli::Command as clap_builder::derive::Subcommand>::augment_subcommands
 0.2%   0.4%  58.5KiB              prek <<prek::config::Config as serde_core::de::Deserialize>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map::<<serde_saphyr::de::deserializer::YamlDeserializer as serde_core::de::Deserializer>::deserialize_map::MA>
 0.2%   0.3%  49.4KiB annotate_snippets annotate_snippets::renderer::render::render
 0.2%   0.3%  48.5KiB              prek prek::run::{closure#0}
 0.1%   0.3%  40.9KiB              prek prek::cli::run::run::run::{closure#0}
 0.1%   0.2%  33.6KiB              prek <prek::cli::RunOptions as clap_builder::derive::Args>::augment_args
 0.1%   0.2%  30.1KiB     granit_parser <granit_parser::scanner::Scanner<granit_parser::input::str::StrInput>>::fetch_more_tokens
 0.1%   0.2%  28.9KiB    cargo_metadata <&mut serde_json::de::Deserializer<serde_json::read::StrRead> as serde_core::de::Deserializer>::deserialize_struct::<<cargo_metadata::Package as serde_core::de::Deserialize>::deserialize::__Visitor>
 0.1%   0.2%  28.4KiB              prek <<prek::config::RemoteHook as serde_core::de::Deserialize>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map::<<serde_saphyr::de::deserializer::YamlDeserializer as serde_core::de::Deserializer>::deserialize_map::MA>
 0.1%   0.2%  28.0KiB        aws_lc_sys aws_lc_0_42_0_edwards25519_scalarmuldouble_alt
 0.1%   0.2%  27.5KiB        aws_lc_sys aws_lc_0_42_0_edwards25519_scalarmuldouble
 0.1%   0.2%  26.5KiB              prek prek::cli::try_repo::try_repo::{closure#0}
 0.1%   0.2%  25.6KiB              prek <<prek::config::LocalHook as serde_core::de::Deserialize>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map::<<serde_saphyr::de::deserializer::YamlDeserializer as serde_core::de::Deserializer>::deserialize_map::MA>
 0.1%   0.2%  25.5KiB              prek <prek::languages::bun::bun::Bun as prek::languages::LanguageBackend>::install::{closure#0}
 0.1%   0.2%  25.0KiB              prek <<prek::config::UpdateOptions as serde_core::de::Deserialize>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map::<<serde_saphyr::de::deserializer::YamlDeserializer as serde_core::de::Deserializer>::deserialize_map::MA>
 0.1%   0.2%  24.9KiB               xml <xml::reader::parser::PullParser>::dispatch_token
 0.1%   0.2%  24.4KiB              prek <prek::languages::node::installer::NodeInstaller>::install::{closure#0}
 0.1%   0.2%  24.0KiB     granit_parser <granit_parser::scanner::Scanner<serde_saphyr::de::buffered_input::ReaderInput>>::fetch_more_tokens
42.2%  88.2%  12.3MiB                   And 25791 smaller methods. Use -n N to show more.
47.9% 100.0%  14.0MiB                   .text section size, the file size is 29.1MiB

Base Branch Results

 File  .text     Size             Crate Name
 1.1%   2.3% 332.0KiB        aws_lc_sys aws_lc_0_42_0_aes_gcm_encrypt_avx512
 1.1%   2.3% 332.0KiB        aws_lc_sys aws_lc_0_42_0_aes_gcm_decrypt_avx512
 0.3%   0.6%  79.3KiB              prek <prek::cli::Command as clap_builder::derive::Subcommand>::augment_subcommands
 0.2%   0.4%  58.3KiB              prek <<prek::config::Config as serde_core::de::Deserialize>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map::<<serde_saphyr::de::deserializer::YamlDeserializer as serde_core::de::Deserializer>::deserialize_map::MA>
 0.2%   0.3%  49.4KiB annotate_snippets annotate_snippets::renderer::render::render
 0.1%   0.3%  39.7KiB              prek prek::cli::run::run::run::{closure#0}
 0.1%   0.3%  38.7KiB              prek prek::run::{closure#0}
 0.1%   0.2%  34.3KiB              prek <prek::cli::RunOptions as clap_builder::derive::Args>::augment_args
 0.1%   0.2%  30.1KiB     granit_parser <granit_parser::scanner::Scanner<granit_parser::input::str::StrInput>>::fetch_more_tokens
 0.1%   0.2%  29.4KiB              prek <<prek::config::RemoteHook as serde_core::de::Deserialize>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map::<<serde_saphyr::de::deserializer::YamlDeserializer as serde_core::de::Deserializer>::deserialize_map::MA>
 0.1%   0.2%  28.6KiB    cargo_metadata <&mut serde_json::de::Deserializer<serde_json::read::StrRead> as serde_core::de::Deserializer>::deserialize_struct::<<cargo_metadata::Package as serde_core::de::Deserialize>::deserialize::__Visitor>
 0.1%   0.2%  28.0KiB        aws_lc_sys aws_lc_0_42_0_edwards25519_scalarmuldouble_alt
 0.1%   0.2%  27.5KiB        aws_lc_sys aws_lc_0_42_0_edwards25519_scalarmuldouble
 0.1%   0.2%  25.8KiB              prek prek::cli::try_repo::try_repo::{closure#0}
 0.1%   0.2%  25.3KiB              prek <<prek::config::LocalHook as serde_core::de::Deserialize>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map::<<serde_saphyr::de::deserializer::YamlDeserializer as serde_core::de::Deserializer>::deserialize_map::MA>
 0.1%   0.2%  25.2KiB              prek <<prek::config::UpdateOptions as serde_core::de::Deserialize>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map::<<serde_saphyr::de::deserializer::YamlDeserializer as serde_core::de::Deserializer>::deserialize_map::MA>
 0.1%   0.2%  24.9KiB               xml <xml::reader::parser::PullParser>::dispatch_token
 0.1%   0.2%  24.4KiB              prek <prek::languages::node::installer::NodeInstaller>::install::{closure#0}
 0.1%   0.2%  24.0KiB     granit_parser <granit_parser::scanner::Scanner<serde_saphyr::de::buffered_input::ReaderInput>>::fetch_more_tokens
 0.1%   0.2%  22.8KiB              prek prek::archive::unzip::<fs_err::tokio::file::File, &std::path::PathBuf>::{closure#0}
42.3%  88.2%  12.3MiB                   And 25798 smaller methods. Use -n N to show more.
47.9% 100.0%  14.0MiB                   .text section size, the file size is 29.2MiB

⚡️ Hyperfine Benchmarks

Summary: 0 regressions, 1 improvements above the 10% threshold.

Environment

OS: Linux 6.17.0-1020-azure
CPU: 4 cores
prek version: prek 0.4.10+24 (8344be1 2026-07-22)
Rust version: rustc 1.97.1 (8bab26f4f 2026-07-14)
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	2.3 ± 0.1	2.2	2.6	1.08 ± 0.04
prek-head --version	2.1 ± 0.1	2.0	2.5	1.00

prek list

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base list	9.3 ± 0.1	9.1	9.8	1.03 ± 0.02
prek-head list	9.1 ± 0.1	8.9	9.5	1.00

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

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base validate-config .pre-commit-config.yaml	3.3 ± 0.1	3.2	3.5	1.09 ± 0.03
prek-head validate-config .pre-commit-config.yaml	3.0 ± 0.1	2.9	3.2	1.00

prek sample-config

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base sample-config	2.6 ± 0.1	2.5	2.7	1.05 ± 0.03
prek-head sample-config	2.5 ± 0.1	2.3	2.6	1.00

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	74.7 ± 2.6	71.0	79.3	1.03 ± 0.04
prek-head run --all-files	72.5 ± 1.9	70.1	74.8	1.00

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

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run --all-files	72.9 ± 2.5	69.3	76.6	1.02 ± 0.05
prek-head run --all-files	71.9 ± 2.3	68.7	76.3	1.00

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	72.7 ± 2.4	67.7	79.4	1.00
prek-head run --all-files	73.4 ± 6.3	68.6	114.3	1.01 ± 0.09

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	19.4 ± 0.5	18.8	20.6	1.00 ± 0.04
prek-head run trailing-whitespace --all-files	19.3 ± 0.5	18.5	20.8	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	24.9 ± 1.6	22.9	28.0	1.01 ± 0.09
prek-head run end-of-file-fixer --all-files	24.6 ± 1.7	22.8	28.2	1.00

prek run check-json --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-json --all-files	7.8 ± 0.3	7.2	8.5	1.03 ± 0.06
prek-head run check-json --all-files	7.6 ± 0.3	7.0	8.2	1.00

prek run check-yaml --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-yaml --all-files	7.6 ± 0.1	7.4	7.9	1.02 ± 0.03
prek-head run check-yaml --all-files	7.4 ± 0.2	7.2	7.9	1.00

prek run check-toml --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-toml --all-files	7.7 ± 0.3	7.4	8.5	1.02 ± 0.05
prek-head run check-toml --all-files	7.6 ± 0.3	7.1	8.3	1.00

prek run check-xml --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-xml --all-files	7.6 ± 0.4	7.2	8.8	1.02 ± 0.08
prek-head run check-xml --all-files	7.4 ± 0.4	7.0	8.5	1.00

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

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run detect-private-key --all-files	13.4 ± 1.0	11.7	15.3	1.03 ± 0.11
prek-head run detect-private-key --all-files	13.1 ± 1.0	12.0	15.7	1.00

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	17.5 ± 0.7	16.6	19.2	1.01 ± 0.06
prek-head run fix-byte-order-marker --all-files	17.3 ± 0.7	16.0	18.6	1.00

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	4.6 ± 0.2	4.5	5.0	1.06 ± 0.05
prek-head install-hooks	4.4 ± 0.0	4.3	4.4	1.00

prek install-hooks (warm - with cache)

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base install-hooks	4.6 ± 0.0	4.6	4.6	1.05 ± 0.01
prek-head install-hooks	4.4 ± 0.1	4.3	4.5	1.00

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	36.6 ± 0.7	35.4	38.0	1.00
prek-head run	37.1 ± 1.1	35.5	38.7	1.01 ± 0.04

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

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run --files '*.json'	8.0 ± 0.1	7.8	8.2	1.02 ± 0.02
prek-head run --files '*.json'	7.8 ± 0.1	7.6	8.1	1.00

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	7.2 ± 0.2	6.8	7.7	1.08 ± 0.04
prek-head run --dry-run --all-files	6.7 ± 0.1	6.5	7.0	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	12.0 ± 0.2	11.8	12.4	1.08 ± 0.08
prek-head run check-hooks-apply --all-files	11.1 ± 0.8	10.2	12.2	1.00

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

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-useless-excludes --all-files	10.7 ± 0.1	10.6	10.9	1.02 ± 0.02
prek-head run check-useless-excludes --all-files	10.5 ± 0.1	10.3	10.7	1.00

prek run identity --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run identity --all-files	38.2 ± 90.5	9.9	358.9	3.81 ± 9.03
prek-head run identity --all-files	10.0 ± 0.5	9.6	11.1	1.00

✅ Performance improvement for prek run identity --all-files: 73.7900% faster

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Suppress Gitleaks banner and status logs in the Docker image test so Docker's stdout/stderr interleaving cannot make the snapshot flaky after #2385.

Codecov Report

❌ Patch coverage is 94.73684% with 7 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (master@92bdbf2). Learn more about missing BASE report.
⚠️ Report is 6 commits behind head on master.

Files with missing lines	Patch %	Lines
crates/prek/src/process.rs	88.70%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #2385   +/-   ##
=========================================
  Coverage          ?   93.37%           
=========================================
  Files             ?      129           
  Lines             ?    27513           
  Branches          ?        0           
=========================================
  Hits              ?    25689           
  Misses            ?     1824           
  Partials          ?        0

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This MR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [prek](https://github.com/j178/prek) | tools | patch | `0.4.10` → `0.4.13` | MR created with the help of [el-capitano/tools/renovate-bot](https://gitlab.com/el-capitano/tools/renovate-bot). **Proposed changes to behavior should be submitted there as MRs.** --- ### Release Notes <details> <summary>j178/prek (prek)</summary> ### [`v0.4.13`](https://github.com/j178/prek/blob/HEAD/CHANGELOG.md#0413) [Compare Source](j178/prek@v0.4.12...v0.4.13) Released on 2026-08-10. ##### Highlights ##### Manage hook tools with mise The new `language: mise` support lets hooks install tools using [`mise`](https://mise.jdx.dev/) in an isolated environment: ```yaml repos: - repo: local hooks: - id: golangci-lint name: golangci-lint language: mise additional_dependencies: ["aqua:golangci/golangci-lint@2"] entry: golangci-lint run --fast-only ./... pass_filenames: false ``` ##### Run commands in hook environments The new `prek exec` subcommand can run an explicit command in a configured hook's prepared environment. For example, the hook above makes its managed binary available to this command: ```console $ prek exec golangci-lint -- golangci-lint --version ``` ##### Enhancements - Add `mise` language support ([#2540](j178/prek#2540)) - Add `deny-filename-pattern` and `require-filename-pattern` hooks ([#2488](j178/prek#2488)) - Add `prek exec` for running commands in a hook environment ([#2478](j178/prek#2478)) - Add `yaml-language-server:` comment to YAML sample config ([#2486](j178/prek#2486)) - Make `prek cache size` output terminal-aware ([#2508](j178/prek#2508)) - Match file regexes against path bytes ([#2541](j178/prek#2541)) - Show hook aliases in run output ([#2497](j178/prek#2497)) - Show hook descriptions in run output ([#2490](j178/prek#2490)) ##### Performance - Avoid env cache scans for skipped hooks ([#2502](j178/prek#2502)) - Cache Node version queries ([#2500](j178/prek#2500)) ##### Bug fixes - Fix Node hook installation with npm 11 ([#2487](j178/prek#2487)) - Isolate dependency installs from inherited Git repository state ([#2506](j178/prek#2506)) ##### Documentation - Document combined group filtering ([#2495](j178/prek#2495)) - Explain what prek does in README ([#2507](j178/prek#2507)) - Refresh "Why prek" highlights ([#2474](j178/prek#2474)) ##### Contributors - [@will-wright-eng](https://github.com/will-wright-eng) - [@Repiteo](https://github.com/Repiteo) - [@j178](https://github.com/j178) ### [`v0.4.12`](https://github.com/j178/prek/blob/HEAD/CHANGELOG.md#0412) [Compare Source](j178/prek@v0.4.11...v0.4.12) Released on 2026-08-03. ##### Enhancements - Add `--require-group` for hook group intersections ([#2472](j178/prek#2472)) - Align fast-path and builtin pre-commit hooks ([#2433](j178/prek#2433)) - Do not shuffle file list for verbose output ([#2431](j178/prek#2431)) - Improve top-level command descriptions ([#2429](j178/prek#2429)) - Install `uv` from Astral CDN and drop source racing ([#2455](j178/prek#2455)) - Make `prek install --force` bypass external hooks paths ([#2437](j178/prek#2437)) - Show builtin hook flags in verbose list output ([#2427](j178/prek#2427)) - Verify uv release archive checksums ([#2456](j178/prek#2456)) ##### Performance - Precompute file tags in parallel ([#2440](j178/prek#2440)) - Skip diffs after known hook modifications ([#2447](j178/prek#2447)) - Skip worktree diffs for read-only languages ([#2432](j178/prek#2432)) - Track builtin hook file changes directly ([#2404](j178/prek#2404)) ##### Bug fixes - Use full object IDs in diff snapshots ([#2448](j178/prek#2448)) ##### Documentation - Add a multi-repository configuration example ([#2434](j178/prek#2434)) - Rewrite benchmark documentation ([#2469](j178/prek#2469)) ##### Contributors - [@j178](https://github.com/j178) - [@BitWeaverDev](https://github.com/BitWeaverDev) - [@allanlewis](https://github.com/allanlewis) ### [`v0.4.11`](https://github.com/j178/prek/blob/HEAD/CHANGELOG.md#0411) [Compare Source](j178/prek@v0.4.10...v0.4.11) Released on 2026-07-25. ##### Highlights - This release adds two new builtin hooks, `deny-pattern` and `require-pattern`, as native alternatives for `pygrep` use cases. `deny-pattern` fails when a configured pattern is found, while `require-pattern` ensures every selected file contains a match. By matching natively without spawning a Python subprocess, they run over 4x faster than `pygrep` in benchmarks. Note that they use [Rust `regex` syntax](https://docs.rs/regex/latest/regex/#syntax), which does not support look-around features such as negative lookbehind. - `prek run` now supports `--glob <PATTERN>` to run hooks on tracked files matching a glob. It can be repeated or combined with `--files` and `--directory`. - Hook priorities now support reusable aliases: ```toml [priorities] checks = 10 [[repos]] repo = "builtin" hooks = [ { id = "check-json", priority = "checks" }, { id = "check-yaml", priority = "checks" }, ] ``` This makes parallel scheduling easier to read and maintain. ##### Enhancements - Add `deny-pattern` and `require-pattern` builtin hooks ([#2359](j178/prek#2359)) - Support `--glob` patterns in `prek run` ([#2381](j178/prek#2381)) - Support reusable aliases for hook priorities ([#2331](j178/prek#2331)) - Implement `requirements-txt-fixer` as a builtin hook ([#2390](j178/prek#2390)) - Improve user-facing warnings and errors ([#2380](j178/prek#2380)) - Install Node hooks through git url ([#2394](j178/prek#2394)) ##### Performance - Reduce blocking-pool overhead in file hooks ([#2384](j178/prek#2384)) - Speed up mixed-line-ending scans with memchr2 ([#2391](j178/prek#2391)) ##### Bug fixes - Honor filenames in builtin hook entry and args ([#2389](j178/prek#2389)) - Match identify tags across filename parts ([#2399](j178/prek#2399)) - Preserve hook output order with a shared pipe ([#2385](j178/prek#2385)) - Preserve system download policy when applying metadata ([#2395](j178/prek#2395)) ##### Contributors - [@j178](https://github.com/j178) - [@chrisoro](https://github.com/chrisoro) </details> --- ### Configuration 📅 **Schedule**: (UTC) - Branch creation - At any time (no schedule defined) - Automerge - At any time (no schedule defined) 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever MR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this MR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this MR, check this box --- This MR has been generated by [Mend Renovate](https://github.com/renovatebot/renovate).

Copilot AI review requested due to automatic review settings July 22, 2026 15:40

j178 added the bug Something isn't working label Jul 22, 2026

Copilot AI reviewed Jul 22, 2026

Copilot AI review requested due to automatic review settings July 22, 2026 15:55

j178 force-pushed the output-order branch from cbc4a01 to 698811d Compare July 22, 2026 15:55

Copilot AI reviewed Jul 22, 2026

Preserve hook output order

df247ed

Copilot AI review requested due to automatic review settings July 22, 2026 16:08

j178 force-pushed the output-order branch from 698811d to df247ed Compare July 22, 2026 16:08

Copilot AI reviewed Jul 22, 2026

j178 merged commit d91c6f3 into master Jul 22, 2026
34 checks passed

j178 deleted the output-order branch July 22, 2026 16:16

j178 mentioned this pull request Jul 22, 2026

Stabilize the Docker image output snapshot #2386

Merged

j178 added a commit that referenced this pull request Jul 22, 2026

Stabilize the Docker image output snapshot (#2386 )

6d63339

Suppress Gitleaks banner and status logs in the Docker image test so Docker's stdout/stderr interleaving cannot make the snapshot flaky after #2385.

BrewTestBot mentioned this pull request Jul 24, 2026

prek 0.4.11 Homebrew/homebrew-core#295050

Merged

Preserve hook output order with a shared pipe by j178 · Pull Request #2385 · j178/prek · GitHub

Uh oh!

Preserve hook output order with a shared pipe - #2385

Preserve hook output order with a shared pipe#2385
j178 merged 1 commit into
masterfrom
output-order

j178 commented Jul 22, 2026

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prek-ci-bot Bot commented Jul 22, 2026

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prek-ci-bot Bot commented Jul 22, 2026 •
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codecov Bot commented Jul 22, 2026

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Preserve hook output order with a shared pipe by j178 · Pull Request #2385 · j178/prek · GitHub

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Preserve hook output order with a shared pipe - #2385

Preserve hook output order with a shared pipe#2385j178 merged 1 commit intomasterj178/prek:masterfrom output-orderj178/prek:output-orderCopy head branch name to clipboard

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prek-ci-bot Bot commented Jul 22, 2026

📦 Cargo Bloat Comparison

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prek-ci-bot Bot commented Jul 22, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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⚡️ Hyperfine Benchmarks

prek --version

prek list

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

prek sample-config

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

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

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

prek run trailing-whitespace --all-files

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

prek run check-json --all-files

prek run check-yaml --all-files

prek run check-toml --all-files

prek run check-xml --all-files

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

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

prek install-hooks (cold - no cache)

prek install-hooks (warm - with cache)

prek run (staged files only)

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

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

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

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

prek run identity --all-files

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codecov Bot commented Jul 22, 2026

Codecov Report

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Preserve hook output order with a shared pipe#2385
j178 merged 1 commit into
masterfrom
output-order

prek-ci-bot Bot commented Jul 22, 2026 •
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