• Added Caffeine cache for base type checking
• Improved isBaseType() performance with 5000-entry cache
• Reduced class loading overhead

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• You submit test cases (unit or integration tests) that back your changes.
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Description (英文)

This PR addresses the performance issue observed in the isBaseType method. During performance testing with the shenyu-examples-apache-dubbo-service project, using the dubbo/insert API on a Linux environment (8 CPU, 32GB memory), the isBaseType method was identified as a bottleneck through flame graph analysis.

By introducing a caching mechanism to isBaseType, the TPS (transactions per second) significantly improved from ~1500 to ~18000 during testing with ab. This optimization greatly enhances system performance for scenarios involving frequent type checks.

Description (中文)

本 PR 优化了 isBaseType 方法的性能问题。通过火焰图分析，在使用 shenyu-examples-apache-dubbo-service 项目对 dubbo/insert 接口进行性能测试时（Linux 环境，8 核 CPU，32GB 内存），发现 isBaseType 方法存在性能瓶颈。

为 isBaseType 增加缓存机制后，在使用 ab 工具进行测试时，TPS 从约 1500 提升至约 18000。这一优化大幅提升了频繁类型检查场景下的系统性能。

ab 命令： ab -c 300 -n 10000 -T application/json -p body.json http://localhost:9195/dubbo/insert

Changes (变更内容)

1. Add a caching mechanism to the isBaseType method to reduce redundant computations.

Test Cases (测试情况)

• Conducted performance tests using shenyu-examples-apache-dubbo-service and ab tool, confirming the performance improvement.

Impact (影响范围)

• Performance: Significant TPS improvement in scenarios involving frequent type checks.
• Compatibility: No breaking changes; the caching mechanism is seamlessly integrated.