Aias00 opened a new issue, #6577:
URL: https://github.com/apache/shenyu/issues/6577

   ## Description
   When `allowedOrigin.originRegex` is configured and the origin is not in the 
explicit allow-set, `allowCors = Pattern.matches(originRegex.trim(), origin)` 
recompiles the regex on every request on the WebFilter chain (Netty event loop).
   
   ## Location
   ```
   shenyu-web/.../filter/CrossFilter.java:94
   ```
   
   ## Impact
   Per-CORS-request regex compile when the regex allow-list path is used. Minor 
at low RPS, measurable for high-RPS public APIs relying on regex origins.
   
   ## Suggested fix
   Compile `originRegex` once at config-load time into a 
`java.util.regex.Pattern` field; call `.matcher(origin).matches()`.
   
   ## Related existing issue(s)
   None
   
   _Identified during the 2026-08-02 audit; full list in 
[`docs/issue-candidates-2026-08-02.md`](docs/issue-candidates-2026-08-02.md)._


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