以下关于性能测试的叙述中，不正确的是（ ）
- A.性能测试是在真实环境下检查系统服务等级的满足情况
- B.基于性能测试对系统未来容量做出预测和规划
- C.性能测试主要关注输出结果是否正确
- D.性能测试是性能调优的基础
正确答案及解析
正确答案
解析
性能测试用来保证产品发布后系统的性能能够满足用户需求。性能测试通常存在性能调优与性能评测两种性能测试策略。
性能评测主要包括：在真实环境下，检查系统服务等级的满足情况，评估并报告整个系统的性能；对系统的未来容量作出预测和规划。
性能评测室性能调优的基础，性能调优的步骤如下：查找形成系统瓶颈或者故障的根本原因；进行性能调整和优化；评估性能调整的效果。
选项C是不准确的描述。
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