Mercurial > hg > nginx-site
changeset 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 | 368a449e85b8 |
| children | 625b592698b6 |
| files | xml/en/docs/http/server_names.xml |
| diffstat | 1 files changed, 9 insertions(+), 0 deletions(-) [+] |
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--- a/xml/en/docs/http/server_names.xml +++ b/xml/en/docs/http/server_names.xml @@ -313,15 +313,24 @@ may have up to three hashes: an exact na starting with an asterisk, and a wildcard names hash ending with an asterisk. The sizes of the hashes are optimized at the configuration phase so that a name can be found with the fewest CPU cache misses. +</para> + +<para> The exact names hash is searched first. If a name is not found using the exact name hash, then the wildcard names hash starting with an asterisk is searched. If the name is not found there, the wildcard names hash ending with an asterisk is searched. +</para> + +<para> Searching wildcard names hashes is slower than searching exact name hash because names are searched by domain parts. Note that the special wildcard form “<literal>.example.org</literal>” is stored in a wildcard names hash and not in an exact names hash. +</para> + +<para> Regular expressions are tested sequentially and therefore are the slowest method and are non-scalable. </para>