The performance comparison was to index all of the PHP test scripts (*.phpt files) under the PHP 5.3 source tree.

性能比较所执行的是对 PHP 5.3 源树下的所有 PHP 测试脚本（*.phpt 文件）进行索引。

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The first potential future change would modify the unacknowledged packet list so that it is organized with an index as a red-black tree instead of the current linear list.

第一个可能的未来改变是对未应答的包列表进行修改，因此包列表的组织形式不再是当前的线性列表而是通过索引组织成红-黑树。

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When creating a foreign key, Informix automatically creates a B-Tree index on the child table when creating a foreign key.

创建一个外键时，Informix 自动地在子表上创建一个 B-Tree 索引。

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