А чо, так можно было?
Aug. 17th, 2016 05:33 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
izardI just had the best experience ever in optimizing stuff for customers. If I measure by ROI, it greatly exceeds anything I did in my ~11 years of full time software performance work..
I got a customer call about a performance issue yesterday. A s/w engineer told me that he has a benchmark that uses his library and he absolutely needs to make it faster by N%. He used Intel Vtune to profile it, found that one of the functions in his library is the worst hotspot; it has CPI of 10+ and all kinds of stalls. Unfortunately the function is a big one so he does not know where to look. So I told him - "If you have Vtune results opened, double click on the function name.". So he did, and promised to call me today after he meditates a bit over results.
Today he called me back and told there is no issue any more - he had fixed everything.
So estimating the ROI: R - performance issue is resolved. I - nearly 0 (10 minutes phone call with a trivial suggestion ;) Of course I'll still report it to my boss as a "helped customer X to fix performance issue that helped project Y".
I got a customer call about a performance issue yesterday. A s/w engineer told me that he has a benchmark that uses his library and he absolutely needs to make it faster by N%. He used Intel Vtune to profile it, found that one of the functions in his library is the worst hotspot; it has CPI of 10+ and all kinds of stalls. Unfortunately the function is a big one so he does not know where to look. So I told him - "If you have Vtune results opened, double click on the function name.". So he did, and promised to call me today after he meditates a bit over results.
Today he called me back and told there is no issue any more - he had fixed everything.
So estimating the ROI: R - performance issue is resolved. I - nearly 0 (10 minutes phone call with a trivial suggestion ;) Of course I'll still report it to my boss as a "helped customer X to fix performance issue that helped project Y".
