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| titus |
 Posted: Mon Oct 21, 2002 6:14 am Post subject: Performance |
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Novice
Joined: 14 Oct 2002
Posts: 23
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I am having a fixed length message format.
From the following options which one is best for performance
1) Creating a MRM an load MRM parser for parsing the message
2) Treat the message as Blob . Inside compute do a subString to get this fields.
Experts opinions are accepted
Thanks in advance
titus:) |
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| zpat |
| Posted: Mon Oct 21, 2002 8:07 am Post subject: |
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Jedi Council
Joined: 19 May 2001
Posts: 5866
Location: UK
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Why not try each method with a few thousand test messages and see which works fastest?
My money is on the BLOB. |
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| Tibor |
| Posted: Mon Oct 21, 2002 12:35 pm Post subject: Re: Performance |
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Grand Master
Joined: 20 May 2001
Posts: 1033
Location: Hungary
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| titus wrote: |
I am having a fixed length message format.
From the following options which one is best for performance
1) Creating a MRM an load MRM parser for parsing the message
2) Treat the message as Blob . Inside compute do a subString to get this fields. |
- BLOB to BLOB wo/conversion is the fastest 
- BLOB to XML, MRM, etc is fine, but you are losing the flexibility
- BLOB to non-BLOB may be slower then an MRM to MRM, when you are working with a complex structure, especially on repeating compound elements.
Tibor |
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| titus |
| Posted: Mon Oct 21, 2002 1:44 pm Post subject: |
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Novice
Joined: 14 Oct 2002
Posts: 23
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Thanks for ur reply Tibor.
Could you please explain first scenario
"BLOB to BLOB wo/conversion is the fastest ".
This what i am doing .Input node i made it as a Blob message structure and in compute node i am getting same Blob message and cast into a String variable. Then i am using this string variable for substring operation. Is this is a right approach? |
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| Tibor |
| Posted: Tue Oct 22, 2002 6:46 am Post subject: |
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Grand Master
Joined: 20 May 2001
Posts: 1033
Location: Hungary
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| titus wrote: |
| ...Input node i made it as a Blob message structure and in compute node i am getting same Blob message and cast into a String variable. Then i am using this string variable for substring operation. Is this is a right approach? |
It depends. If your ESQL code is simple this may be fast. But I don't see the difference between the structure of input and output messages. When your task is only a cut-and-paste, you ever leave CASTing.
Tibor |
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