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From "Markus Wiederkehr (JIRA)" <server-...@james.apache.org>
Subject [jira] Updated: (MIME4J-96) Field.parse() should defer parsing until the parsed value is actually requested
Date Sun, 04 Jan 2009 19:03:44 GMT

     [ https://issues.apache.org/jira/browse/MIME4J-96?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Markus Wiederkehr updated MIME4J-96:
------------------------------------

    Attachment: DateTimeField.java

Attached a new version of DateTimeField that does not parse the Date header until the value
is actually requested.

This change alone reduces the runtime of LongMultipartReadBench #3 from 47 seconds to 35 seconds
on my machine.

The other Field subclasses could be refactored in a similar fashion.

If this is acceptable I would also suggest that FieldParser gets renamed in FieldFactory to
better describe what it actually is..

> Field.parse() should defer parsing until the parsed value is actually requested
> -------------------------------------------------------------------------------
>
>                 Key: MIME4J-96
>                 URL: https://issues.apache.org/jira/browse/MIME4J-96
>             Project: JAMES Mime4j
>          Issue Type: Improvement
>    Affects Versions: 0.5
>            Reporter: Markus Wiederkehr
>             Fix For: 0.6
>
>         Attachments: DateTimeField.java
>
>
> Currently the MessageBuilder invokes Field.parse() for every header field of a message.
Benchmark tests have shown that this has a significant impact on performance.
> For example, DateTimeField parses the Date header into a java.util.Date object regardless
if this value is ever needed or not.

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