Re: Performance problem with timestamps in result sets

Thomas,

That can't possibly be ...

Dave
On 8-Mar-06, at 8:37 AM, Thomas Dudziak wrote:

> Hi,
>
> while profiling an application of ours, I noticed a performance
> problem with the PostgreSQL JDBC driver (the same for any version:
> 8.0, 8.1, 8.2dev-501).
> In short, whenever the ResultSet contains a timestamp value, the JDBC
> driver takes nearly one second to extract it (this is against a 8.0 on
> Windows, database and application on the same machine; with a
> non-development configuration, the number would be a bit lower).
> The profiling shows that the culprit is
>
> -> AbstractJdbc2ResultSet.getTimestamp(int) : 7130ms | 8190 calls
>     -> TimestampUtils.loadCalendar(GregorianCalendar, String, String)
> : 5417ms | 8190 calls
>         -> TimestampUtils.firstNonDigit : 2163ms | 49140 times
>         -> TimestampUtils.number(String, int, int) : 1562ms | 49140
> times
>
> Now my question is, is there something to make this faster ? Nearly
> 1sec for a ResulSet.getTimestamp call is too much for us.
>
> cheers,
> Tom
>
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