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Posted to dev@hc.apache.org by "Alin Vasile (Updated) (JIRA)" <ji...@apache.org> on 2011/11/03 21:27:32 UTC
[jira] [Updated] (HTTPCLIENT-1137) The values for the Via header
are created by httpclient-cache for each cached and backend request
[ https://issues.apache.org/jira/browse/HTTPCLIENT-1137?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Alin Vasile updated HTTPCLIENT-1137:
------------------------------------
Attachment: via_header_hashmap.patch
Patch modified according to Jon's comments to use a simple HashMap.
> The values for the Via header are created by httpclient-cache for each cached and backend request
> -------------------------------------------------------------------------------------------------
>
> Key: HTTPCLIENT-1137
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1137
> Project: HttpComponents HttpClient
> Issue Type: Improvement
> Components: Cache
> Affects Versions: 4.1.2
> Reporter: Alin Vasile
> Priority: Trivial
> Fix For: 4.2 Alpha2
>
> Attachments: cached_via_header_vals.patch, via_header_hashmap.patch
>
>
> The Via header that gets generated and inserted by the caching layer is done repeatedly in the HTTP conversation, even if the constructed string is constant for each protocol version that is involved.
> The proposed patch constructs a map of generated values held in memory with the associated ProtocolVersion as a key and uses read/write locks to access the data. This solution minimizes the time to generate such a value from several milliseconds to 40-50 microseconds.
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