[GitHub] [incubator-shenyu] ppj19891020 opened a new issue #3177: [Question] http globalplugin Large performance loss

[GitBox <gi...@apache.org>]

ppj19891020 opened a new issue #3177:
URL: https://github.com/apache/incubator-shenyu/issues/3177


   ### Question
   
   随着元数据的数据量越来越大，http转发需要遍历所有的元数据和正则匹配相关，造成性能开销大。
   元数据只有一条的压测情况：
   ![1](https://user-images.githubusercontent.com/4514718/161368664-acde2d94-2360-4e4e-9c63-63d8805599ba.png)
   
   元数据差不多1000条压测情况：
   ![2](https://user-images.githubusercontent.com/4514718/161368674-6975cf02-7fb9-4343-9768-03d3a2738cd3.png)
   
   压测的火焰图：
   ![3](https://user-images.githubusercontent.com/4514718/161368687-95192f62-8aa2-404e-8378-a339a6ce2d3c.png)
   
   
   
   查看代码发现http转发的请求都需要走到这个元数据遍历，如果元数据越来约定，性能开销会越来越大，目前这个代码是soul 2.2.4，看了新版本也有一样的问题！！！
   ```java
   public MetaData obtain(final String path) {
           MetaData metaData = META_DATA_MAP.get(path);
           if (Objects.isNull(metaData)) {
               String key = META_DATA_MAP.keySet().stream().filter(k -> PathMatchUtils.match(k, path)).findFirst().orElse("");
               return META_DATA_MAP.get(key);
           }
           return metaData;
       }
   ```


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