Chintan Shah writes, "I have tried both ESB and BPEL run-time look-ups and they work great. After enabling run-time look-ups ESB or BPEL calling any service via UDDI was taking longer than 1 minutes to invoke (it was couple of milliseconds earlier). Upon analysis we find out the actual invocation was not the issue but preparing the call (get-wsdl, parse wsdl and store in specific cache) was taking the longest time. Also we saw that if load on BPEL and ESB if not very high, I don't see many performance issues but as soon as load increases (with number of threads) things get really slow. We did look at service registry logs and it's response time, service registry was extremely fast. Here is what we found the reason behind slowness: ESB and BPEL both caches WSDL into their cache in specific format. If we do run-time look-ups BPEL and ESB gets the WSDL using service registry (which is pretty fast), but analyzing those wsdl and storing them in structure which BPEL and ESB run-time engine can understand takes a long time. In conclusion, all this stuff BPEL, ESB, OSR - run-time look-ups looked like an ideal approach but had some performance drawbacks. All that glitters is not gold."

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