Thank you for your answer William. I've tried the parameter NAOK out and this is the result:
(RED: FALSE, GREEN: TRUE) http://www.nabble.com/file/p20376259/RandC_2.png As you can see the green line is almost flat now, at least a lot better then when disabling this option. Still there is something causing the line to be not completely flat. Although I suspect some of this is because of the timing function (is there any other, more accurate, timing function in R besides system.time()?) it still looks depending on vector size. Numeric output: NAOK=FALSE: ---------------- [1] 0.000 0.001 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009 0.011 0.012 [13] 0.012 0.014 0.014 0.015 0.017 0.018 0.019 0.020 0.021 0.021 0.023 0.024 [25] 0.025 0.026 0.027 0.028 0.029 0.030 0.031 0.032 0.033 0.034 0.035 0.036 [37] 0.038 0.038 0.039 0.041 0.042 0.043 0.044 0.045 0.046 0.046 0.048 0.049 [49] 0.050 0.050 0.052 0.053 0.054 0.055 0.056 0.057 0.058 0.060 0.060 0.061 [61] 0.063 0.063 0.065 0.065 NAOK=TRUE: --------------- [1] 0.000 0.000 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 [13] 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.003 0.002 0.003 0.002 0.002 [25] 0.003 0.003 0.003 0.003 0.003 0.003 0.004 0.003 0.004 0.003 0.004 0.004 [37] 0.004 0.004 0.004 0.004 0.004 0.004 0.005 0.005 0.005 0.005 0.005 0.005 [49] 0.005 0.006 0.006 0.005 0.006 0.006 0.006 0.006 0.006 0.006 0.006 0.007 [61] 0.006 0.007 0.007 0.008 Input sizes: ------------- [1] 512 131584 262656 393728 524800 655872 786944 918016 1049088 [10] 1180160 1311232 1442304 1573376 1704448 1835520 1966592 2097664 2228736 [19] 2359808 2490880 2621952 2753024 2884096 3015168 3146240 3277312 3408384 [28] 3539456 3670528 3801600 3932672 4063744 4194816 4325888 4456960 4588032 [37] 4719104 4850176 4981248 5112320 5243392 5374464 5505536 5636608 5767680 [46] 5898752 6029824 6160896 6291968 6423040 6554112 6685184 6816256 6947328 [55] 7078400 7209472 7340544 7471616 7602688 7733760 7864832 7995904 8126976 [64] 8258048 Thanks again for the advice, helped me a lot. And yes, I will be looking at using .Call() or .External(), but since the learning curve is a bit steep and I'm currently only making a proof of concept, .C() will do fine for now. (P.S. I posted this using Nabble, so layout in e-mail might be a bit awkward..) William Dunlap wrote: > > > Does using NAOK=TRUE in the .C() help? That would avoid > an NA-scan of the input vectors. > > Bill Dunlap > TIBCO Spotfire Inc > wdunlap tibco.com > > -- View this message in context: http://www.nabble.com/.C%28...%2C-DUP%3DFALSE%29-memory-costs-depending-on-input-size--tp20368695p20376259.html Sent from the R devel mailing list archive at Nabble.com. ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
