[jira] Commented: (DERBY-760) Implement routines that will write/read data from a byte[] in drda format rather than calling getXXX and setXXX methods

["Dyre Tjeldvoll (JIRA)" <de...@db.apache.org>]

    [ http://issues.apache.org/jira/browse/DERBY-760?page=comments#action_12360848 ] 

Dyre Tjeldvoll commented on DERBY-760:
--------------------------------------

I don't know if it is related, but have noticed that reading Strings from DRDA messages is somewhat inefficient. (DDMReader.readString()) The first problem is that a temporary char[] is allocated to do the decoding, and the initialization of this array seems to be expensive. The second problem is that since it is not possible to compare a String to a DRDA string (byte[]) one ends up decoding and storing strings that have been decoded and stored before. 

Please let me know if this is an unrelated issue, and I will create new one. Thanks.

> Implement routines that will write/read data from a byte[] in drda format rather than calling getXXX and setXXX methods
> -----------------------------------------------------------------------------------------------------------------------
>
>          Key: DERBY-760
>          URL: http://issues.apache.org/jira/browse/DERBY-760
>      Project: Derby
>         Type: Improvement
>   Components: Network Server, Performance
>     Versions: 10.2.0.0
>     Reporter: Kathey Marsden
>     Priority: Minor
>      Fix For: 10.2.0.0

>
> A while back Dan suggested this performance improvement for Network Server.
> Instead of calling the getXXX setXXX methods in Network Server, 
> we can implement either a getDRDARow/setDRDARow or 
> getDRDAValue/setDRDAvalue methods to bypass the conversion and 
> minimize object creation.  Perhaps the signature would be 
> something like.
> public void getDRDARow(int[] drdaTypes, byte[], startOffset)

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