[Geotools-devel] [jira] Reopened: (GEOT-2683) Speed up dbf reading when the target charset is not multibyte

[Andrea A. (JIRA) <ji...@co...>]

     [ http://jira.codehaus.org/browse/GEOT-2683?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrea Aime reopened GEOT-2683:
-------------------------------


Reopen after Ivan reporting issues with some one-byte charsets

> Speed up dbf reading when the target charset is not multibyte
> -------------------------------------------------------------
>
>                 Key: GEOT-2683
>                 URL: http://jira.codehaus.org/browse/GEOT-2683
>             Project: GeoTools
>          Issue Type: Improvement
>          Components: data shapefile
>    Affects Versions: 2.6-M2
>            Reporter: Andrea Aime
>            Assignee: Andrea Aime
>             Fix For: 2.6-M2
>
>         Attachments: GEOT-2683.patch, GEOT-2683.patch, ReadSpeedTest.java
>
>
> Decoding the bytes of the dbf row into chars is one of the most expensive operations the shapefile reader is doing (when the dbf is opened at all, that is).
> This is due to che usage of the Decoder class, which is pretty generic.
> A custom code path that just assumes the 1-1 byte-char correspondance is quite a bit faster (15-20% overall while reading statepop.shp)

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