Seems like results I posted are specific to Julia 0.4 (0.4.1 to be precise), here are results for Julia 0.3 (about 10 times faster):
elapsed time: 0.031528334 seconds (1048640 bytes allocated) elapsed time: 0.031559074 seconds (1048640 bytes allocated) elapsed time: 0.031342995 seconds (1048640 bytes allocated) elapsed time: 0.031462577 seconds (1048640 bytes allocated) elapsed time: 0.031317323 seconds (1048640 bytes allocated) elapsed time: 0.032238497 seconds (1048640 bytes allocated) elapsed time: 0.031747699 seconds (1048640 bytes allocated) elapsed time: 0.032849825 seconds (1048640 bytes allocated) elapsed time: 0.031415585 seconds (1048640 bytes allocated) elapsed time: 0.031334191 seconds (1048640 bytes allocated) elapsed time: 0.033120056 seconds (1049168 bytes allocated) elapsed time: 0.032014831 seconds (1048640 bytes allocated) elapsed time: 0.031040683 seconds (1048640 bytes allocated) elapsed time: 0.031430475 seconds (1048640 bytes allocated) elapsed time: 0.031396017 seconds (1048640 bytes allocated) and for Julia 0.5 (about 1000 times faster, 2.5Gb/sec): 0.000392 seconds (114 allocations: 1.012 MB) 0.000386 seconds (114 allocations: 1.012 MB) 0.000412 seconds (114 allocations: 1.012 MB) 0.000384 seconds (114 allocations: 1.012 MB) 0.000394 seconds (114 allocations: 1.012 MB) 0.000398 seconds (114 allocations: 1.012 MB) 0.000409 seconds (114 allocations: 1.012 MB) 0.000400 seconds (114 allocations: 1.012 MB) 0.000396 seconds (114 allocations: 1.012 MB) 0.000386 seconds (114 allocations: 1.012 MB) 0.000390 seconds (114 allocations: 1.012 MB) 0.000727 seconds (114 allocations: 1.012 MB, 46.14% gc time) 0.000398 seconds (114 allocations: 1.012 MB) 0.000386 seconds (114 allocations: 1.012 MB) 0.000395 seconds (114 allocations: 1.012 MB) 0.000400 seconds (114 allocations: 1.012 MB) Any suggestions on why the results are so different and how to fix TCP sockets for Julia 0.4? On Wednesday, June 15, 2016 at 5:10:12 PM UTC+3, Andrei Zh wrote: > > I've just tested performance of TCP server/client in Julia REPL and find > results pretty disappointing. The server is as simple as: > > server = listen(2000) > while true > sock = accept(server) > begin > while true > @time readbytes(sock, 1024*1024) > end > end > end > > It listens on 2000 port for a single connection and than starts reading > from it chunks of 1Mb. > > Client is not much harder: > > sock = connect(2000) > Mb = rand(UInt8, 1024*1024) # 1 Mb of data > for i=1:1_000 write(sock, Mb) end > > Basically it simply writes 1Gb of data in chunk of 1Mb. When I run these > snippets in 2 different REPL windows, from the server one I get the > following: > > 0.393481 seconds (2 allocations: 1.000 MB) > 0.406101 seconds (2 allocations: 1.000 MB) > 0.424946 seconds (2 allocations: 1.000 MB) > 0.410651 seconds (2 allocations: 1.000 MB) > 0.406987 seconds (2 allocations: 1.000 MB) > 0.386872 seconds (2 allocations: 1.000 MB) > 0.399998 seconds (40 allocations: 1.001 MB) > > I.e. speed of data transfer is about 2.5 Mb/sec. I'm pretty much sure my > local network interface can do much better. Am I doing something wrong? > > > > >
