There is still one in XCode tools. It’s a alternate download: https://developer.apple.com/download/more/?q=Additional%20Tools%20for%20Xcode <https://developer.apple.com/download/more/?q=Additional%20Tools%20for%20Xcode> Of course this is limited to OSX, but it’s there.
Sincerely, Eric Tykwinski TrueNet, Inc. P: 610-429-8300 > On Apr 8, 2020, at 10:33 PM, Lee <[email protected]> wrote: > > On 4/7/20, Adam Thompson <[email protected]> wrote: >> I’m looking for a practical guide – i.e. specifically NOT an academic paper, >> thanks anyway – to predicting the effect of increased (or decreased) latency >> on my user’s applications. >> >> Specifically, I want to estimate how much improvement there will be in >> {bandwidth, application XYZ responsiveness, protocol ABC goodput, whatever} >> if I decrease the RTT between the user and the server by 10msec, or by >> 20msec, or by 40msec. >> >> My googling has come up with lots of research articles discussing >> theoretical frameworks for figuring this out, but nothing concrete in terms >> of a calculator or even a rule-of-thumb. > > There used to be network simulators that claimed to figure that out for you - > eg > https://opnetmodeler.wordpress.com/ > "Predict application performance using real traffic in a simulated mode" > > I suspect all that died after encryption became the norm, since you > have to be able to see and understand what's going on before you can > predict what will happen after changing the network. Take a look at > https://www.cse.wustl.edu/~jain/cse567-08/ftp/simtools/index.html > the date is 2008 and all the references are http://xxx (or maybe I > can't search worth beans & missed all the current references) > > Or maybe simulation just got too expensive? I vaguely recall sitting > through a few OPNET sales pitches in the early 2000s & people getting > excited about the product until they found out how much it cost :( > > Regards, > Lee > > >> >> Ultimately, this goes into MY calculator – we have the usual north-american >> duopoly on last-mile consumer internet here; I’m connected directly to only >> one of the two. There’s a cost $X to improve connectivity so I’m peered >> with both, how do I tell if it will be worthwhile? >> >> Anyone got anything at all that might help me? >> >> Thanks in advance, >> -Adam >> >> Adam Thompson >> Consultant, Infrastructure Services >> [[MERLIN LOGO]]<https://www.merlin.mb.ca/> >> 100 - 135 Innovation Drive >> Winnipeg, MB, R3T 6A8 >> (204) 977-6824 or 1-800-430-6404 (MB only) >> [email protected]<mailto:[email protected]> >> www.merlin.mb.ca<http://www.merlin.mb.ca/> >> >>
