Refactor identify using smallvec

[j178]

❯ hyperfine --warmup 3 'prek run -a trailing-whitespace' './target/release/prek run -a trailing-whitespace'
Benchmark 1: prek run -a trailing-whitespace
  Time (mean ± σ):      56.6 ms ±   7.8 ms    [User: 28.1 ms, System: 35.7 ms]
  Range (min … max):    48.0 ms …  73.0 ms    37 runs

Benchmark 2: ./target/release/prek run -a trailing-whitespace
  Time (mean ± σ):      51.0 ms ±   2.6 ms    [User: 28.1 ms, System: 35.3 ms]
  Range (min … max):    48.1 ms …  61.5 ms    46 runs

Summary
  ./target/release/prek run -a trailing-whitespace ran
    1.11 ± 0.16 times faster than prek run -a trailing-whitespace

[codecov]

Codecov Report

❌ Patch coverage is 99.23664% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.94%. Comparing base (8dee1b5) to head (cac05dc).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
src/identify.rs	99.23%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #982      +/-   ##
==========================================
- Coverage   90.03%   89.94%   -0.10%     
==========================================
  Files          66       66              
  Lines       12344    12227     -117     
==========================================
- Hits        11114    10997     -117     
  Misses       1230     1230              

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[github-actions]

📦 Cargo Bloat Comparison

Binary size change: -0.62% (16.2 MiB → 16.1 MiB)

Expand for cargo-bloat output

PR Branch Results

 File  .text     Size          Crate Name
 0.6%   1.3% 101.1KiB          prek? <prek::cli::Command as clap_builder::derive::Subcommand>::augment_subcommands
 0.5%   1.2%  88.0KiB           prek prek::languages::<impl prek::config::Language>::run::{{closure}}
 0.5%   1.1%  85.8KiB           prek prek::builtin::pre_commit_hooks::Implemented::run::{{closure}}
 0.4%   0.9%  63.8KiB           prek prek::archive::unpack::{{closure}}
 0.3%   0.7%  49.2KiB           prek prek::run::{{closure}}
 0.3%   0.6%  42.0KiB           prek prek::languages::<impl prek::config::Language>::install::{{closure}}
 0.2%   0.5%  40.9KiB regex_automata regex_automata::meta::strategy::new
 0.2%   0.5%  40.1KiB          prek? <prek::cli::RunArgs as clap_builder::derive::Args>::augment_args
 0.2%   0.4%  32.9KiB           prek prek::workspace::Workspace::discover
 0.2%   0.4%  32.8KiB           prek prek::cli::run::run::run::{{closure}}
 0.2%   0.4%  32.3KiB           prek prek::languages::node::installer::NodeInstaller::install::{{closure}}
 0.2%   0.4%  31.8KiB             h2 h2::proto::connection::DynConnection<B>::recv_frame
 0.2%   0.4%  31.7KiB             h2 h2::proto::connection::Connection<T,P,B>::poll
 0.2%   0.4%  27.6KiB           prek prek::identify::by_extension::{{closure}}
 0.2%   0.3%  26.2KiB     hyper_util hyper_util::client::legacy::client::Client<C,B>::send_request::{{closure}}
 0.2%   0.3%  25.8KiB     hyper_util hyper_util::client::legacy::client::Client<C,B>::connect_to::{{closure}}::{{closure}}::{{closure}}
 0.2%   0.3%  25.0KiB        globset globset::GlobSetBuilder::build
 0.2%   0.3%  25.0KiB           prek prek::main
 0.1%   0.3%  24.2KiB           prek prek::languages::golang::installer::GoInstaller::install::{{closure}}
 0.1%   0.3%  23.7KiB          hyper hyper::proto::h1::dispatch::Dispatcher<D,Bs,I,T>::poll_loop
39.8%  87.7%   6.4MiB                And 10186 smaller methods. Use -n N to show more.
45.4% 100.0%   7.3MiB                .text section size, the file size is 16.1MiB

Base Branch Results

 File  .text     Size          Crate Name
 0.6%   1.3% 101.1KiB          prek? <prek::cli::Command as clap_builder::derive::Subcommand>::augment_subcommands
 0.5%   1.2%  88.0KiB           prek prek::languages::<impl prek::config::Language>::run::{{closure}}
 0.5%   1.1%  85.8KiB           prek prek::builtin::pre_commit_hooks::Implemented::run::{{closure}}
 0.4%   0.8%  63.8KiB           prek prek::archive::unpack::{{closure}}
 0.3%   0.7%  49.2KiB           prek prek::run::{{closure}}
 0.3%   0.6%  42.0KiB           prek prek::languages::<impl prek::config::Language>::install::{{closure}}
 0.2%   0.5%  40.9KiB regex_automata regex_automata::meta::strategy::new
 0.2%   0.5%  40.1KiB          prek? <prek::cli::RunArgs as clap_builder::derive::Args>::augment_args
 0.2%   0.5%  38.5KiB           prek prek::identify::by_extension::{{closure}}
 0.2%   0.4%  32.9KiB           prek prek::workspace::Workspace::discover
 0.2%   0.4%  32.8KiB           prek prek::cli::run::run::run::{{closure}}
 0.2%   0.4%  32.3KiB           prek prek::languages::node::installer::NodeInstaller::install::{{closure}}
 0.2%   0.4%  31.8KiB             h2 h2::proto::connection::DynConnection<B>::recv_frame
 0.2%   0.4%  31.7KiB             h2 h2::proto::connection::Connection<T,P,B>::poll
 0.2%   0.3%  26.2KiB     hyper_util hyper_util::client::legacy::client::Client<C,B>::send_request::{{closure}}
 0.2%   0.3%  25.8KiB     hyper_util hyper_util::client::legacy::client::Client<C,B>::connect_to::{{closure}}::{{closure}}::{{closure}}
 0.2%   0.3%  25.0KiB        globset globset::GlobSetBuilder::build
 0.2%   0.3%  25.0KiB           prek prek::main
 0.1%   0.3%  24.2KiB           prek prek::languages::golang::installer::GoInstaller::install::{{closure}}
 0.1%   0.3%  23.7KiB          hyper hyper::proto::h1::dispatch::Dispatcher<D,Bs,I,T>::poll_loop
39.7%  87.5%   6.4MiB                And 10186 smaller methods. Use -n N to show more.
45.4% 100.0%   7.3MiB                .text section size, the file size is 16.2MiB