I'm not aware of known network issues that would explain what you are 
seeing.  If we can get sample code to recreate we could investigate 
further. 

On Monday, October 27, 2014 7:11:03 AM UTC-4, Dieter Reuter wrote:
>
> Hi,
>
> I'm currently building a small Node.js prototype which is aimed to run in 
> a production system on AIX 7.x. Tue to the fact, the solution should run at 
> a industrial customer with strong SLA's, I'm forced to use the official IBM 
> binaries for Node.js. Currently I'm using the latest prebuild v0.10.32 
> binaries directly from IBM.
>
> My first mini test program seems to run really slow. Are their any known 
> performance issues on AIX?
>
> It's just a proxy web service which excepts HTTP POST requests with a XML 
> payload of 5-30kByte, this payload will be forwarded to another web service 
> (written in Java which is doing a heavy data manipulation on it) and 
> returning around 2-50kByte of binary data. Thats's it. And all is running 
> on the same machine, using 127.0.0.1 local loopback interface.
>
> Running a job with 250 web requests (serial calls, nothing parallel) 
> directly on the Java web service gives me around 2.3s in total processing 
> time. With my Node.js proxy in between it leeds to around 10s, that's a 4X. 
> The same test on my 2008 MBP on OSX gives me 3.0s on Java and 3.4s through 
> my Node.js proxy - a 10% overhead only which is really great. The AIX 7.1 
> server machine is just a virtual test machine from https://www.*ibm*
> .com/partnerworld/*pdp.*
>
> Any help or pointers are greatly appreciated.
>
> Dieter
>

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