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https://issues.apache.org/jira/browse/HTTPCLIENT-1227?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Oleg Kalnichevski updated HTTPCLIENT-1227:
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Fix Version/s: 4.2.2
> DateUtils parsing triggers ParseExceptions
> ------------------------------------------
>
> Key: HTTPCLIENT-1227
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1227
> Project: HttpComponents HttpClient
> Issue Type: Improvement
> Affects Versions: 4.1.3, 4.2.1, 4.2.2, 4.3 Final
> Reporter: Patrick Linskey
> Fix For: 4.2.2
>
> Attachments: faster-dates.patch
>
>
> DateUtils.DEFAULT_PATTERNS is not in the same order as the HTTP header spec
> [1], and uses a SimpleDateFormat.parse() method that creates exceptions. The
> upshot is that in the common case, extra parsing must happen, and an
> exception must be created (and its stack must be filled in). This leads to
> unfortunate additional CPU overhead.
> [1] http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3.1
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