From: | Ken Geis <kgeis(at)speakeasy(dot)net> |
---|---|
To: | Oliver Jowett <oliver(at)opencloud(dot)com> |
Cc: | pgsql-jdbc(at)postgresql(dot)org |
Subject: | Re: Performance tweaks |
Date: | 2005-02-23 08:20:14 |
Message-ID: | 421C3CBE.8020309@speakeasy.net |
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Thread: | |
Lists: | pgsql-jdbc |
Oliver Jowett wrote:
> Ken Geis wrote:
>
>> First, in PGStream, I "unrolled" SendInteger4 and SendInteger2, like
>> this:
>>
>> private static final byte[] B4 = new byte[4];
>> public void SendInteger4(int val) throws IOException
>> {
>> B4[0] = (byte) ((val >> 24)&255);
>> B4[1] = (byte) ((val >> 16)&255);
>> B4[2] = (byte) ((val >> 8)&255);
>> B4[3] = (byte) (val&255);
>> pg_output.write(B4, 0, 4);
>> }
>
>
> This isn't safe across multiple PGStreams. Can you try benchmarking
> again with "private final" instead of "private static final"? If that's
> still a win it is probably worth changing.
I tested it more rigorously with this change. Not a win.
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