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, 7 insertions, 5 deletions

diff --git a/crates/shirabe/src/repository/vcs/fossil_driver.rs b/crates/shirabe/src/repository/vcs/fossil_driver.rs
index cf9a2ea0..a75f6874 100644
--- a/crates/shirabe/src/repository/vcs/fossil_driver.rs
+++ b/crates/shirabe/src/repository/vcs/fossil_driver.rs
@@ -12,7 +12,9 @@ use crate::util::ProcessExecutor;
 use chrono::{DateTime, FixedOffset, Utc};
 use indexmap::IndexMap;
 use shirabe_external_packages::composer::pcre::Preg;
-use shirabe_php_shim::{PhpMixed, RuntimeException, dirname, is_dir, is_file, is_writable};
+use shirabe_php_shim::{
+    PhpMixed, RuntimeException, dirname, is_dir, is_file, is_writable, php_regex,
+};
 
 #[derive(Debug)]
 pub struct FossilDriver {
@@ -82,7 +84,7 @@ impl FossilDriver {
                 .into());
             }
 
-            let local_name = Preg::replace(r"{[^a-z0-9]}i", "-", &self.inner.url);
+            let local_name = Preg::replace(php_regex!(r"{[^a-z0-9]}i"), "-", &self.inner.url);
             self.repo_file = Some(format!("{}/{}.fossil", cache_repo_dir, local_name));
             self.checkout_dir = format!("{}/{}/", cache_vcs_dir, local_name);
 
@@ -301,7 +303,7 @@ impl FossilDriver {
                 Some(&self.checkout_dir),
             );
             for branch in self.inner.process.borrow().split_lines(&output) {
-                let branch = Preg::replace(r"/^\*/", "", branch.trim());
+                let branch = Preg::replace(php_regex!(r"/^\*/"), "", branch.trim());
                 let branch = branch.trim().to_string();
                 branches.insert(branch.clone(), branch);
             }
@@ -317,13 +319,13 @@ impl FossilDriver {
         deep: bool,
     ) -> anyhow::Result<bool> {
         if Preg::is_match(
-            r"#(^(?:https?|ssh)://(?:[^@]@)?(?:chiselapp\.com|fossil\.))#i",
+            php_regex!(r"#(^(?:https?|ssh)://(?:[^@]@)?(?:chiselapp\.com|fossil\.))#i"),
             url,
         ) {
             return Ok(true);
         }
 
-        if Preg::is_match(r"!/fossil/|\.fossil!", url) {
+        if Preg::is_match(php_regex!(r"!/fossil/|\.fossil!"), url) {
             return Ok(true);
         }