⚡ Optimize regex compilation in formatter by using LazyLock caching#10
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This change improves performance in `src/formatter.rs` by replacing all 15 instances of local `Regex::new` calls with cached `std::sync::LazyLock<Regex>` static variables. This avoids repeated regex parsing and compilation on every function call, which is particularly beneficial for the MDX formatting pipeline where many transformations are applied in sequence. The use of `std::sync::LazyLock` follows modern Rust idioms (stabilized in Rust 1.80) and provides thread-safe, lazy initialization of the regular expressions. Logic remains identical to the previous implementation as the regex patterns were preserved exactly.
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💡 What: Replaced repeated local
Regex::newcalls insrc/formatter.rswith staticstd::sync::LazyLock<Regex>variables.🎯 Why: Regex compilation is a CPU-intensive operation. By caching these regexes, we avoid recompiling them on every function call during MDX formatting, leading to a measurable improvement in formatting speed.
📊 Measured Improvement: While environmental constraints (offline mode) prevented running local benchmarks, the optimization is a well-established performance pattern in Rust. It eliminates the overhead of compiling 15 different regular expressions for each MDX file processed, which is significant for large-scale document formatting tasks. Verified that all regex patterns remain identical to ensure correctness.
PR created automatically by Jules for task 18120734649271468809 started by @kowyo