Mercurial > hg > nginx-site
comparison xml/en/docs/http/server_names.xml @ 618:2300e4c1a231
Improved paragraph layout in the 'Optimization' section
| author | Vladimir Homutov <vl@nginx.com> |
|---|---|
| date | Mon, 06 Aug 2012 09:17:12 +0000 |
| parents | 130fad6dc1b4 |
| children | 656dfb085020 |
comparison
equal
deleted
inserted
replaced
| 617:368a449e85b8 | 618:2300e4c1a231 |
|---|---|
| 311 The hashes are bound to the listen ports and every listen port | 311 The hashes are bound to the listen ports and every listen port |
| 312 may have up to three hashes: an exact names hash, a wildcard names hash | 312 may have up to three hashes: an exact names hash, a wildcard names hash |
| 313 starting with an asterisk, and a wildcard names hash ending with an asterisk. | 313 starting with an asterisk, and a wildcard names hash ending with an asterisk. |
| 314 The sizes of the hashes are optimized at the configuration phase so that | 314 The sizes of the hashes are optimized at the configuration phase so that |
| 315 a name can be found with the fewest CPU cache misses. | 315 a name can be found with the fewest CPU cache misses. |
| 316 </para> | |
| 317 | |
| 318 <para> | |
| 316 The exact names hash is searched first. | 319 The exact names hash is searched first. |
| 317 If a name is not found using the exact name hash, then the wildcard names hash | 320 If a name is not found using the exact name hash, then the wildcard names hash |
| 318 starting with an asterisk is searched. | 321 starting with an asterisk is searched. |
| 319 If the name is not found there, the wildcard names hash | 322 If the name is not found there, the wildcard names hash |
| 320 ending with an asterisk is searched. | 323 ending with an asterisk is searched. |
| 324 </para> | |
| 325 | |
| 326 <para> | |
| 321 Searching wildcard names hashes is slower than searching exact name hash | 327 Searching wildcard names hashes is slower than searching exact name hash |
| 322 because names are searched by domain parts. | 328 because names are searched by domain parts. |
| 323 Note that the special wildcard form “<literal>.example.org</literal>” | 329 Note that the special wildcard form “<literal>.example.org</literal>” |
| 324 is stored in a wildcard names hash and not in an exact names hash. | 330 is stored in a wildcard names hash and not in an exact names hash. |
| 331 </para> | |
| 332 | |
| 333 <para> | |
| 325 Regular expressions are tested sequentially | 334 Regular expressions are tested sequentially |
| 326 and therefore are the slowest method and are non-scalable. | 335 and therefore are the slowest method and are non-scalable. |
| 327 </para> | 336 </para> |
| 328 | 337 |
| 329 <para> | 338 <para> |