perf(regex): eliminate per-call clone overhead in preg_* dispatch

regex::Regex::clone() does not share the underlying meta engine's
search-cache pool, so every fresh clone pays a ~10us warmup cost on
its first use. Two changes together eliminate this across nearly all
preg_* call sites:

- A php_regex! macro resolves PHP-style patterns to a per-call-site
  &'static regex::Regex (via regex-macro's LazyLock), applied at the
  majority of call sites throughout the codebase.
- Call sites still passing dynamic pattern strings go through
  PATTERN_CACHE, which now stores Arc<(Regex, bool)> and hands out
  Arc::clone()s instead of cloning the Regex itself.

PregPattern::resolve() returns a ResolvedPattern enum (Arc or
'static reference) rather than an owned Regex, so neither path ever
clones the Regex proper.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/crates/shirabe/tests/dependency_resolver/pool_builder_test.rs b/crates/shirabe/tests/dependency_resolver/pool_builder_test.rs
index e6897ff7..659f5e48 100644
--- a/crates/shirabe/tests/dependency_resolver/pool_builder_test.rs
+++ b/crates/shirabe/tests/dependency_resolver/pool_builder_test.rs
@@ -20,8 +20,8 @@ use shirabe::repository::lock_array_repository::LockArrayRepository;
 use shirabe::repository::repository_factory::RepositoryFactory;
 use shirabe::repository::repository_set::{RepositorySet, RootAliasInput};
 use shirabe_external_packages::composer::pcre::preg::Preg;
-use shirabe_php_shim::PREG_SPLIT_DELIM_CAPTURE;
 use shirabe_php_shim::PhpMixed;
+use shirabe_php_shim::{PREG_SPLIT_DELIM_CAPTURE, php_regex};
 use std::path::PathBuf;
 
 /// Maps the PHP `$loadPackage` closure: pops the optional `id` from the data, loads the
@@ -58,7 +58,7 @@ fn load_package(
 fn read_test_file(file: &str, fixtures_dir: &str) -> IndexMap<String, String> {
     let contents = shirabe_php_shim::file_get_contents(file).unwrap();
     let tokens = Preg::split4(
-        r"#(?:^|\n*)--([A-Z-]+)--\n#",
+        php_regex!(r"#(?:^|\n*)--([A-Z-]+)--\n#"),
         &contents,
         -1,
         PREG_SPLIT_DELIM_CAPTURE,
@@ -144,7 +144,7 @@ fn get_integration_tests(fixtures_dir: &std::path::Path) -> IndexMap<String, Int
     for file in files {
         let file = file.to_str().unwrap().to_string();
 
-        if !Preg::is_match(r"/\.test$/", &file) {
+        if !Preg::is_match(php_regex!(r"/\.test$/"), &file) {
             continue;
         }