return String.valueOf(QUALIFIERS.indexOf(""));
            }

            int i = QUALIFIERS.indexOf(qualifier);

            // Just returning an Integer with the index here is faster, but requires a lot of if/then/else to check for
            // -1
            //  or QUALIFIERS.size and then resort to lexical ordering. Most comparisons are decided by the first
            // character,

* 然后也请评论你做了哪些验证，这样我就知道你检查过。🤓

## 创建 Pull Request { #create-a-pull-request }

你可以通过 Pull Request 为源代码[做贡献](contributing.md)，例如：

* 修正文档中的一个错别字。
* 通过[编辑这个文件](https://github.com/fastapi/fastapi/edit/master/docs/en/data/external_links.yml)分享你创建或发现的关于 FastAPI 的文章、视频或播客。
    * 请确保把你的链接添加到相应区块的开头。
* 帮助把[文档翻译](contributing.md#translations)成你的语言。
    * 你也可以审阅他人创建的翻译。
* 提议新增文档章节。
* 修复现有 issue/bug。
    * 记得添加测试。
* 添加新功能。

* Para corregir un error tipográfico que encontraste en la documentación.
* Para compartir un artículo, video o podcast que creaste o encontraste sobre FastAPI [editando este archivo](https://github.com/fastapi/fastapi/edit/master/docs/en/data/external_links.yml).
    * Asegúrate de agregar tu enlace al inicio de la sección correspondiente.
* Para ayudar a [traducir la documentación](contributing.md#translations) a tu idioma.

To sign off a single commit:

`git commit --amend --signoff`

To sign off one or multiple commits:

`git rebase --signoff origin/master`

Then force push your branch:

`git push --force origin test-branch`

### Fixing sanity check failures after public API changes

   * equal, ignoring the case of any ASCII alphabetic characters between {@code 'a'} and {@code 'z'}
   * or {@code 'A'} and {@code 'Z'} inclusive.
   *
   * <p>This method is significantly faster than {@link String#equalsIgnoreCase} and should be used
   * in preference if at least one of the parameters is known to contain only ASCII characters.
   *

   * remove()}. Otherwise, all optional operations are supported. Null row keys, columns keys, and
   * values are not supported.
   *
   * <p>Lookups by row key are often faster than lookups by column key, because the data is stored
   * in a {@code Map<R, Map<C, V>>}. A method call like {@code column(columnKey).get(rowKey)} still

        is.read(readData);
    }
    
    long readTime = System.currentTimeMillis() - start;
    
    assertArrayEquals(data, readData);
    
    // RDMA should be faster than TCP for large transfers
    log.info("RDMA Write: {}ms, Read: {}ms", writeTime, readTime);
}

@Test
public void testRdmaFallbackToTcp() throws Exception {

        int i;

        /*
         * Compare 8 bytes at a time. Benchmarking on x86 shows a stride of 8 bytes is no slower
         * than 4 bytes even on 32-bit. On the other hand, it is substantially faster on 64-bit.
         */
        for (i = 0; i < strideLimit; i += stride) {
          long lw = theUnsafe.getLong(left, BYTE_ARRAY_BASE_OFFSET + (long) i);

* `Field(index=True)` tells SQLModel that it should create a **SQL index** for this column, that would allow faster lookups in the database when reading data filtered by this column.

    SQLModel will know that something declared as `str` will be a SQL column of type `TEXT` (or `VARCHAR`, depending on the database).

  * Use optimized image based on Jessie by default
  * Add support for Ubuntu Wily
  * Master is configured with automatic restart-on-failure, via CloudWatch
  * Bootstrap reworked to be more similar to GCE; better supports reboots/restarts
  * Use an elastic IP for the master by default
  * Experimental support for node spot instances (set NODE\_SPOT\_PRICE=0.05)

#### GCE