public
Created

Experiments to measure the relative speed of CRAN mirrors

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cranometer.r
R
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# Modified from Barry Rowlingson's cranometer, posted to R-help 7/30/09
 
cranometer <- function(mirrors, url = "/src/base/COPYING", cacheOK = FALSE) {
old <- options(timeout = 10)
on.exit(options(old))
 
urls <- paste0(mirrors$URL, url)
times <- vapply(urls, time_download, cacheOK = cacheOK,
FUN.VALUE = numeric(1), USE.NAMES = FALSE)
names(times) <- mirrors$Name
 
times
}
 
#' Returns time in kilobytes / s
time_download <- function(url, cacheOK = FALSE) {
cat(".")
dest <- tempfile()
on.exit(file.remove(dest))
 
down <- function(src) {
download.file(src, dest, cacheOK = cacheOK, method = "internal", quiet = TRUE)
}
 
time <- tryCatch(system.time(down(url))[["elapsed"]],
error = function(e) NA)
 
file.info(dest)$size / time / 1024
}
 
rowMax <- function(x) apply(x, 1, max, na.rm = TRUE)
 
# # Eliminate the slowest mirrors (<20 kbs from best of three)
#
# mirrors <- getCRANmirrors(all = FALSE, local.only = FALSE)
# # About 20k
# three <- replicate(3, cranometer(mirrors, url = "/src/base/COPYING"))
# best <- rowMax(three)
# # Check these look reasonable
# names(best)[best <= 20]
# dput(names(best)[best > 20])
 
reasonable <- c("0-Cloud", "Argentina (La Plata)", "Argentina (Mendoza)", "Austria",
"Belgium", "Brazil (PR)", "Brazil (RJ)", "Brazil (SP 1)", "Brazil (SP 2)",
"Canada (BC)", "Canada (NS)", "Canada (ON)", "Canada (QC 1)",
"Canada (QC 2)", "Chile", "Colombia (Bogota)", "Colombia (Cali)",
"Denmark", "Ecuador", "France (Lyon 1)", "France (Lyon 2)", "France (Montpellier)",
"France (Paris 1)", "France (Paris 2)", "Germany (Berlin)", "Germany (Bonn)",
"Germany (Goettingen)", "Greece", "Hungary", "Indonesia", "Ireland",
"Italy (Milano)", "Italy (Padua)", "Japan (Tsukuba)", "Korea (Seoul 1)",
"Latvia", "Mexico (Mexico City)", "Mexico (Texcoco)", "Netherlands (Amsterdam)",
"Netherlands (Utrecht)", "New Zealand", "Norway", "Poland", "Slovakia",
"Sweden", "Switzerland", "Taiwan (Taichung)", "UK (Bristol)",
"UK (London)", "UK (St Andrews)", "USA (CA 1)", "USA (CA 2)",
"USA (IA)", "USA (IN)", "USA (KS)", "USA (MD)", "USA (MI)", "USA (MO)",
"USA (OH)", "USA (OR)", "USA (PA 2)", "USA (TN)", "USA (TX 1)",
"USA (WA 1)", "USA (WA 2)", "Venezuela")
 
all <- getCRANmirrors(all = FALSE, local.only = FALSE)
mirrors <- subset(all, Name %in% reasonable)
 
# About 100k
bigger <- replicate(3, cranometer(mirrors, url = "/src/base/FAQ"))
cat("\n")
dput(bigger)
speeds.r
R
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speeds <- list(
"US (TX)" = structure(c(262.840221774111, 77.0136755671303, 18.3376898912204,
71.7678820463323, 84.1740379648102, 79.209788156113, 65.4987690915765,
62.8061167137747, 84.5233078319553, 114.011849930025, 152.775878906389,
175.604458512953, 163.396661931907, 163.615399096519, 77.7980287237472,
95.1513520703391, 108.931107954605, 95.7842500978379, 47.986141784409,
89.934292218518, 72.7937481387693, 68.9344067258476, 86.2531426428296,
69.8005157766909, 69.2861128826839, 86.2531426428296, 74.524818978685,
70.4442092940722, 49.9267578124935, 27.8470501537986, 87.1138297397149,
80.6737314356746, 64.7355419093372, 40.3768427899147, 56.7149434455063,
109.713378029485, 251.482928240334, 123.553313441886, 79.3640929382667,
85.2900928994578, 63.8228214751667, 80.8872952513691, 60.2963508263972,
63.228506531388, 74.2531610724317, 85.6487057638594, 50.9040829341589,
37.8978924418776, 92.6616399734995, 74.118073453552, 156.89435574482,
129.608380832546, 376.063701922235, 217.088282636915, 481.183870569322,
203.701171874259, 200.690809728939, 243.953499251398, 189.196134868234,
325.921875, 33.3298890441992, 236.403681092923, 168.580280172752,
175.352515243873, 88.6980857684877, 182.418959888535, 378.392269740729,
104.730679627461, 67.0069644325465, 121.250697544884, 97.0005580358375,
121.371105387117, 90.4668416911799, 102.276739016761, 102.966051495218,
161.241033146091, 185.46388941588, 232.801339285069, 284.234193313761,
260.598514127287, 108.834107858454, 125.958552126186, 93.1560237234596,
88.7586805557638, 46.8278556034378, 126.916617990689, 95.4103849532331,
94.8918502522949, 96.1610567466077, 108.351687167494, 95.8593749998906,
102.534146917024, 107.968819014882, 106.278872282474, 66.5327725231524,
63.0979365643372, 111.312115778509, 88.0552616174979, 76.3402268112541,
64.872984673629, 106.836278955398, 114.977143108917, 252.522113894431,
130.504826831335, 108.931107954605, 109.028281110695, 112.645809331888,
82.0824063968337, 90.6681773923138, 92.9435004753777, 82.1375693045704,
105.727251838323, 87.7391982232573, 103.929169324026, 118.316266335978,
109.811952493503, 279.042701199724, 143.620097678798, 433.406748671376,
283.574717227053, 623.575015944155, 248.416063261181, 228.44991238324,
313.386418269698, 288.937832447584, 345.256223517574, 85.5887276785784,
286.903058979226, 155.695163216589, 113.482547005451, 207.311208895182,
235.947303330103, 492.825415827423, 105.271923449607, 67.6748079318752,
102.362397927178, 94.8918502522949, 106.186536164052, 85.5887276785784,
102.620237720498, 99.6906224511621, 130.577674278635, 200.033884001379,
243.953499251398, 278.407068622828, 265.697180707026, 109.223148458209,
127.394349093245, 126.391626809649, 88.5015953112902, 46.4364373575618,
112.958135975201, 95.4103849532331, 94.6713424670008, 94.1607882317137,
106.929749015745, 106.094360351391, 104.106220719844, 108.159914269814,
103.052869414181, 61.0798116566654, 45.418321488313, 109.320843582429,
98.6446352904457, 97.3094770105375, 65.1496285314428, 81.3719727862629,
121.371105387117, 288.937832445099, 147.052089562875, 112.232050619466,
124.842393385726, 114.546113518919, 105.362675107772, 87.9285633993174,
39.9283577670973, 74.6613947005605, 107.21114309216, 70.0806783974115,
113.16731770815, 132.848590352988, 98.9641320852651, 274.653265449618,
132.993148123242, 502.965856484433, 262.840221774111, 611.103515633893,
246.910511364144, 242.021194306443, 333.936347334419, 304.031599812024,
368.134647968513, 20.1750913048952, 138.25871394259, 132.560415536546,
184.344951922947, 201.203841039021, 218.641687164147), .Dim = c(66L,
3L), .Dimnames = list(c("0-Cloud", "Argentina (La Plata)", "Argentina (Mendoza)",
"Austria", "Belgium", "Brazil (PR)", "Brazil (RJ)", "Brazil (SP 1)",
"Brazil (SP 2)", "Canada (BC)", "Canada (NS)", "Canada (ON)",
"Canada (QC 1)", "Canada (QC 2)", "Chile", "Colombia (Bogota)",
"Colombia (Cali)", "Denmark", "Ecuador", "France (Lyon 1)", "France (Lyon 2)",
"France (Montpellier)", "France (Paris 1)", "France (Paris 2)",
"Germany (Berlin)", "Germany (Bonn)", "Germany (Goettingen)",
"Greece", "Hungary", "Indonesia", "Ireland", "Italy (Milano)",
"Italy (Padua)", "Japan (Tsukuba)", "Korea (Seoul 1)", "Latvia",
"Mexico (Mexico City)", "Mexico (Texcoco)", "Netherlands (Amsterdam)",
"Netherlands (Utrecht)", "New Zealand", "Norway", "Poland", "Slovakia",
"Sweden", "Switzerland", "Taiwan (Taichung)", "UK (Bristol)",
"UK (London)", "UK (St Andrews)", "USA (CA 1)", "USA (CA 2)",
"USA (IA)", "USA (IN)", "USA (KS)", "USA (MD)", "USA (MI)", "USA (MO)",
"USA (OH)", "USA (OR)", "USA (PA 2)", "USA (TN)", "USA (TX 1)",
"USA (WA 1)", "USA (WA 2)", "Venezuela"), NULL)),
 
"US (WA)" = structure(c(163.61539909642, 65.6394753625106, 50.0494279791153,
96.540839751179, 68.4326445268735, 80.940862996677, 67.5252503453059,
63.2612335015448, 85.0526813674382, 468.278556034542, 141.787358613676,
154.124468001238, 144.468916223404, 166.286670918339, 61.8525825531341,
87.3121781782731, 74.8901367187472, 85.8291454529508, 52.298118581515,
110.707158627736, 55.9618604052264, 84.3483113353997, 81.6983309659039,
66.0295532820057, 70.3226139959793, 78.9029716752755, 101.259903169024,
81.7529786789357, 83.0868138171567, 55.6560578893465, 94.3060980902907,
68.1274822324292, 73.317758323319, 63.0003624355652, 69.1684794142505,
96.0854584316087, 138.258713942305, 133.48050692185, 66.4965740614729,
69.5621531730198, 68.0516164393163, 61.1409220235041, 55.7321947674481,
21.9151341447024, 68.8179634712724, 98.1692394578399, 55.8085402397362,
65.0110123005281, 76.6754724749034, 60.0298148943991, 333.026439032939,
230.170815677988, 209.28202589887, 198.088659846114, 204.382446697339,
120.652224210276, 169.75097656244, 177.131453804334, 124.334387716153,
318.283081054675, 260.044049201987, 96.9236345162595, 115.958921370958,
457.75544241603, 258.811677631629, 82.5815561655395, 149.414062500045,
73.7602312160463, 24.3564573784375, 50.6719333022333, 69.9603337864974,
82.6373922413897, 85.1712216898987, 102.87937973484, 86.7428694996386,
347.21790660525, 163.178508845171, 155.893753986039, 151.450685408962,
111.210830868956, 69.404147146509, 86.3918108749259, 75.0280559392099,
78.9029716752755, 85.9498615506314, 57.2194303019672, 86.6813497340515,
83.9427906078221, 93.0142337328551, 90.5338541666423, 93.6557112069083,
93.3695211038821, 131.420110887056, 107.588647117081, 90.3999283469027,
67.2281095296952, 97.1547719594389, 88.6942693214703, 86.8044766512845,
80.4612923798669, 88.9524768013232, 102.706473214281, 186.596493320683,
143.281523164382, 94.5980674342167, 89.4079759509752, 125.741464120344,
88.8877840909091, 83.6555120636673, 44.557310654394, 77.5020311509307,
117.29434081095, 93.943661126029, 87.0517828525643, 98.5650831653038,
92.2420400943206, 543.20312500022, 296.65219205111, 275.27185388516,
226.334635416491, 253.04493400612, 139.680803571429, 215.177294234075,
244.44140625, 155.893753985948, 244.44140625, 324.192846485452,
127.048547946987, 133.428715201941, 275.893235045015, 435.941655585573,
42.7943638392892, 104.730679627257, 77.7980287237472, 32.4106876491631,
53.0471801757792, 74.0731534090868, 80.6205165732149, 82.1375693044449,
85.2306158472957, 96.1610567466766, 459.476327537462, 159.765624999932,
164.054635067038, 146.197013307454, 136.254964464893, 62.2939363532114,
86.0290740902677, 93.8715077765208, 68.6633163623694, 73.098506653707,
85.5887276785784, 62.1355887773228, 83.4271011092326, 89.2121920620213,
75.3518514950751, 71.8945312499885, 83.9427906078221, 127.579022051137,
103.226945206948, 62.9354804969102, 56.8997686801639, 96.6935942444874,
67.3763523291125, 85.5288335374335, 81.8624937207, 99.0443299230207,
95.6343529929733, 146.723533163251, 133.625594429337, 73.8047724184805,
69.4435813210321, 90.7354885857628, 75.6784539473787, 60.1479838213672,
39.6305781857998, 68.6633163623518, 92.7319447078759, 86.5585716182559,
87.3005022321655, 86.3140558792271, 76.6274000783577, 336.696151859663,
255.691847541806, 206.453890413817, 203.362234816934, 277.774325284056,
135.499670870282, 175.857126798635, 173.608953302625, 125.097956115678,
302.526492883666, 291.001674107092, 110.506964850837, 99.9351619991859,
548.074901905937, 463.907724056031, 87.6134072580657), .Dim = c(66L,
3L), .Dimnames = list(c("0-Cloud", "Argentina (La Plata)", "Argentina (Mendoza)",
"Austria", "Belgium", "Brazil (PR)", "Brazil (RJ)", "Brazil (SP 1)",
"Brazil (SP 2)", "Canada (BC)", "Canada (NS)", "Canada (ON)",
"Canada (QC 1)", "Canada (QC 2)", "Chile", "Colombia (Bogota)",
"Colombia (Cali)", "Denmark", "Ecuador", "France (Lyon 1)", "France (Lyon 2)",
"France (Montpellier)", "France (Paris 1)", "France (Paris 2)",
"Germany (Berlin)", "Germany (Bonn)", "Germany (Goettingen)",
"Greece", "Hungary", "Indonesia", "Ireland", "Italy (Milano)",
"Italy (Padua)", "Japan (Tsukuba)", "Korea (Seoul 1)", "Latvia",
"Mexico (Mexico City)", "Mexico (Texcoco)", "Netherlands (Amsterdam)",
"Netherlands (Utrecht)", "New Zealand", "Norway", "Poland", "Slovakia",
"Sweden", "Switzerland", "Taiwan (Taichung)", "UK (Bristol)",
"UK (London)", "UK (St Andrews)", "USA (CA 1)", "USA (CA 2)",
"USA (IA)", "USA (IN)", "USA (KS)", "USA (MD)", "USA (MI)", "USA (MO)",
"USA (OH)", "USA (OR)", "USA (PA 2)", "USA (TN)", "USA (TX 1)",
"USA (WA 1)", "USA (WA 2)", "Venezuela"), NULL)),
 
"Japan" = structure(c(84.4648950414649, 32.6531400280523, 31.8365988864288,
42.1887135398688, 33.4943006645656, 21.643474964583, 28.6835726648674,
23.4229020937141, 58.9015436746987, 94.0159254807694, 53.6526352611939,
72.2771751182737, 38.8372110343185, 48.2513632550335, 33.7067576185879,
38.5619657700753, 37.8158116104579, 40.4838367422989, 28.4763986777726,
60.7156995156481, 39.1733022836538, 35.6120929851398, 40.4168991815476,
24.7110196370805, 32.3506360839068, 17.7080126231527, 52.7951201403888,
46.9898897058824, 23.6495168585526, 98.4063632246362, 25.1224466855087,
35.2221046469741, 41.8707444758481, 404.704314983454, 151.826960403725,
41.8420757018146, 58.703507744957, 14.8688373095065, 45.2334208456699,
41.0964032027574, 66.6416047573608, 38.0631277250076, 33.7626251726519,
27.5644346244926, 36.192094499556, 50.3380161140857, 191.268705985921,
38.7264585313687, 45.0998904520294, 39.0356765011178, 115.849007701424,
72.1491753984657, 71.9792126766781, 62.6772836538456, 91.277597554145,
32.6008810682849, 67.2651090396255, 64.598680298625, 50.4418915084606,
111.719107061244, 106.836278955419, 55.7067926731999, 63.5573079173166,
54.8813215648854, 68.6790764664808, 17.3682965930084, 412.907780827674,
40.0723616803277, 6.74991457033193, 56.7149434454764, 36.5492533268541,
33.3389806669395, 23.8015001217138, 43.4176565275311, 8.5624704445145,
142.781195239487, 63.3924808739627, 77.2082774005068, 49.4220392741618,
48.8296856272476, 58.7882169913418, 50.4040782595322, 53.511691385727,
50.4835618029741, 36.6478869940026, 65.5338890750667, 51.0316088204585,
49.5824353448281, 49.5021073815311, 41.9138213734568, 42.5263406837157,
54.5384663654622, 48.9078443877558, 42.9900468255361, 37.3535156250001,
132.704346498372, 48.3467971222306, 49.3024215913667, 28.5695893232818,
434.949121441272, 291.696188842494, 13.6804010661518, 76.2925737359535,
19.6225932761373, 42.7345115821676, 49.4220392741607, 136.254964464884,
49.3223176452783, 48.5002790178564, 45.9303656989853, 46.7561985941081,
56.6623565716277, 260.598514125803, 58.1726335673489, 46.208205340265,
41.2907780827706, 165.386607746961, 87.4879764674308, 81.1558453685244,
26.7032342418615, 118.430913880809, 68.1274822324421, 92.7319447078879,
93.0142337328792, 71.1412707363229, 112.749726130073, 109.910704249098,
72.9675839552234, 61.4792269240443, 99.2051161728919, 88.1890580164989,
67.5625777363174, 424.377441406234, 33.1941073126017, 33.3298890441775,
56.7149434454749, 36.9246837235649, 34.7612921288394, 36.8245565305819,
19.171875, 40.3235576129989, 57.8970644836573, 45.0500195816436,
70.4036308323714, 39.1984294820391, 48.3085783102772, 39.9936855775526,
36.752031950673, 48.0805283733286, 41.5292909021409, 30.6701889899623,
57.2730567596075, 44.5898223732208, 44.4762384006543, 44.1548782966045,
36.8245565305813, 47.8921250489819, 45.8786423141894, 74.4794047074945,
37.1943710057821, 37.0365767045453, 108.159914269912, 43.0506175149692,
44.4600593397595, 25.0144705536228, 428.844572368469, 255.691847541806,
16.3026147959182, 77.5020311509196, 55.8544056678777, 52.0974864130434,
44.3632316243195, 135.650058962271, 49.6832126524406, 45.2836988236391,
39.9544632641375, 36.8801156080269, 69.7606752996594, 258.394721194527,
37.5948025607508, 18.1228800600536, 41.110226412715, 166.060737941578,
81.4261846269167, 80.8872952514847, 63.0979365642743, 127.44598866007,
61.6964680085817, 96.0099788884506, 87.6762576219509, 60.7156995156473,
110.707158627713, 78.6491011100342, 79.8828125000014, 44.4277365049077,
100.26308705907, 88.8262621929181, 53.8417194383264), .Dim = c(66L,
3L), .Dimnames = list(c("0-Cloud", "Argentina (La Plata)", "Argentina
(Mendoza)",
"Austria", "Belgium", "Brazil (PR)", "Brazil (RJ)", "Brazil (SP 1)",
"Brazil (SP 2)", "Canada (BC)", "Canada (NS)", "Canada (ON)",
"Canada (QC 1)", "Canada (QC 2)", "Chile", "Colombia (Bogota)",
"Colombia (Cali)", "Denmark", "Ecuador", "France (Lyon 1)", "France (Lyon 2)",
"France (Montpellier)", "France (Paris 1)", "France (Paris 2)",
"Germany (Berlin)", "Germany (Bonn)", "Germany (Goettingen)",
"Greece", "Hungary", "Indonesia", "Ireland", "Italy (Milano)",
"Italy (Padua)", "Japan (Tsukuba)", "Korea (Seoul 1)", "Latvia",
"Mexico (Mexico City)", "Mexico (Texcoco)", "Netherlands (Amsterdam)",
"Netherlands (Utrecht)", "New Zealand", "Norway", "Poland", "Slovakia",
"Sweden", "Switzerland", "Taiwan (Taichung)", "UK (Bristol)",
"UK (London)", "UK (St Andrews)", "USA (CA 1)", "USA (CA 2)",
"USA (IA)", "USA (IN)", "USA (KS)", "USA (MD)", "USA (MI)", "USA (MO)",
"USA (OH)", "USA (OR)", "USA (PA 2)", "USA (TN)", "USA (TX 1)",
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122.958453848089, 101.765781119898, 105.162999893073, 119.356155395508,
129.471083818854, 98.5650831653219, 113.167317708332, 95.5595802384678,
87.3629043066476, 96.161056746655, 141.623062717265, 73.6269295933736,
112.958135975044, 116.511633102954, 96.8468329041204, 251.482928240731,
115.958921370971, 245.423098644569, 340.447641016705, 249.430006377546,
212.928054224745, 322.48206629286, 134.161035263447, 301.036214593592,
349.202008928577, 185.463889415784, 155.893753985965, 135.951838848721,
164.054635067113, 156.605792197453, 154.709750791141), .Dim = c(66L,
3L), .Dimnames = list(c("0-Cloud", "Argentina (La Plata)", "Argentina (Mendoza)",
"Austria", "Belgium", "Brazil (PR)", "Brazil (RJ)", "Brazil (SP 1)",
"Brazil (SP 2)", "Canada (BC)", "Canada (NS)", "Canada (ON)",
"Canada (QC 1)", "Canada (QC 2)", "Chile", "Colombia (Bogota)",
"Colombia (Cali)", "Denmark", "Ecuador", "France (Lyon 1)", "France (Lyon 2)",
"France (Montpellier)", "France (Paris 1)", "France (Paris 2)",
"Germany (Berlin)", "Germany (Bonn)", "Germany (Goettingen)",
"Greece", "Hungary", "Indonesia", "Ireland", "Italy (Milano)",
"Italy (Padua)", "Japan (Tsukuba)", "Korea (Seoul 1)", "Latvia",
"Mexico (Mexico City)", "Mexico (Texcoco)", "Netherlands (Amsterdam)",
"Netherlands (Utrecht)", "New Zealand", "Norway", "Poland", "Slovakia",
"Sweden", "Switzerland", "Taiwan (Taichung)", "UK (Bristol)",
"UK (London)", "UK (St Andrews)", "USA (CA 1)", "USA (CA 2)",
"USA (IA)", "USA (IN)", "USA (KS)", "USA (MD)", "USA (MI)", "USA (MO)",
"USA (OH)", "USA (OR)", "USA (PA 2)", "USA (TN)", "USA (TX 1)",
"USA (WA 1)", "USA (WA 2)", "Venezuela"), NULL)),
China = structure(c(21.6279871323529, 18.5199652777778, 8.89749221530249,
18.5199652777778, 7.11900715404328, 12.3041107898622, 14.4020467309908,
17.9611732219828, 21.152244606599, 21.8931288309982, 16.9850225033967,
13.4854116100324, 12.054943647541, 22.2833806818182, 15.7840613162879,
19.6773523082942, 21.1165144636824, 26.1526706328452, 20.6627711776859,
27.0583908279221, 19.2916304976852, 18.7420937968516, 21.9700818321617,
24.0866600433526, 20.8349609375, 23.2360159154275, 21.8931288309983,
17.9097085422636, 15.1343541918886, 22.0087615536972, 27.2947086517466,
16.825002102961, 18.2496008211679, 88.6594082446811, 86.2136314655179,
27.5351906662994, 21.3327245093856, 15.504103729963, 16.0063720390525,
14.70703125, 16.6457743841544, 18.1173573369564, 14.4687228732639,
16.2350344967533, 13.5145692567568, 20.9747928901007, 20.5608167146382,
24.9520490269462, 26.0437011718749, 32.8973067434214, 29.3450154049296,
25.6167552510246, 30.8666087962962, 11.6396429818436, 15.1526988636364,
19.1146430619265, 17.0545382844475, 25.1528703470826, 27.5959747516558,
30.1955955615943, 23.1929064239333, 24.1798386121856, 30.6396484375001,
NA, 32.5746842616584, 15.4906772769517, 21.8548541302447, 13.3414904615795,
8.87223318843153, 13.3986887057878, 17.1716711023352, 14.8467655136579,
8.38429011569415, 19.7487781398103, 20.9747928901009, 26.4851198358049,
25.935636021784, 27.1170858188719, 18.1436524854862, 22.7290482954545,
7.23017730624635, 7.99353345518117, 21.045415088384, 24.0403395432695,
11.3233483355979, 24.85283610835, 2.44359789419995, 27.7799479166667,
20.731304415423, 22.8120010264598, 20.162865423387, 23.6313356568995,
23.5423287429376, 20.260902046191, 11.2824698217509, 14.9354558691756,
27.9663905201348, 16.4703248517788, 15.5484783115672, 96.1613581730803,
81.7057291666621, 19.9060136345542, 25.5121970663266, 15.9364108048163,
16.2773132324217, 24.226698764535, 26.4851198358056, 21.3327245093856,
22.0087615536974, 6.10697438324376, 19.2322716346154, 28.2827524038464,
47.8964619252871, 31.8902463329085, 29.9066424940195, 26.9999493790497,
25.6167552510246, 16.7125355113636, 45.7911229395601, 14.0618409026997,
32.3859496437832, 27.9039655412945, 24.7054872776677, 27.1170858188719,
39.939222244409, 30.8666087962966, 26.4851198358049, 31.8902463329076,
27.9663905201341, NA, 31.6721111460964, 12.9142319860538, 25.3056205718621,
15.5291634316769, 13.0083002731529, 1.98870133033726, 19.1439151033691,
15.0252122145434, 18.410863862297, 22.4434049596053, 20.731304415423,
25.4602373981678, 18.4380185287611, 14.9533212470097, 24.4637506115454,
22.6466966711957, 15.282367435819, 13.9399424889136, 15.6653841635342,
22.0475777116408, 15.8240209651901, 25.616755251024, 27.9663905201341,
23.1071655499072, 23.236015915427, 23.7210181451614, 21.7787048127177,
21.9700818321615, 19.2322716346154, 18.9122187027234, 10.7674216731265,
17.7318816489357, 22.8537048674588, 12.0086230187322, 21.5534078663795,
110.628111172556, 83.33984375, 19.1732769363497, 22.2833806818177,
13.549383755388, 6.12192779750243, 20.5946895593083, 24.040339543269,
19.8743665540542, 19.5023035296416, 16.8704137145747, 25.6693563911698,
22.4031838037637, 25.3056205718621, 20.0336162860577, 4.84909874418154,
14.6897491921269, 16.7798343120809, 16.7798343120809, 21.627987132353,
19.3214475463678, 24.6082215797248, 19.1439151033691, 15.6457779255319,
20.9747928901005, 22.4031838037637, 27.9663905201341, 22.9797363281248,
20.0015625, 23.8568255009542, NA, 22.6147987859714, 17.6817207390383
), .Dim = c(66L, 3L), .Dimnames = list(c("0-Cloud", "Argentina (La Plata)",
"Argentina (Mendoza)", "Austria", "Belgium", "Brazil (PR)", "Brazil (RJ)",
"Brazil (SP 1)", "Brazil (SP 2)", "Canada (BC)", "Canada (NS)",
"Canada (ON)", "Canada (QC 1)", "Canada (QC 2)", "Chile", "Colombia (Bogota)",
"Colombia (Cali)", "Denmark", "Ecuador", "France (Lyon 1)", "France (Lyon 2)",
"France (Montpellier)", "France (Paris 1)", "France (Paris 2)",
"Germany (Berlin)", "Germany (Bonn)", "Germany (Goettingen)",
"Greece", "Hungary", "Indonesia", "Ireland", "Italy (Milano)",
"Italy (Padua)", "Japan (Tsukuba)", "Korea (Seoul 1)", "Latvia",
"Mexico (Mexico City)", "Mexico (Texcoco)", "Netherlands (Amsterdam)",
"Netherlands (Utrecht)", "New Zealand", "Norway", "Poland", "Slovakia",
"Sweden", "Switzerland", "Taiwan (Taichung)", "UK (Bristol)",
"UK (London)", "UK (St Andrews)", "USA (CA 1)", "USA (CA 2)",
"USA (IA)", "USA (IN)", "USA (KS)", "USA (MD)", "USA (MI)", "USA (MO)",
"USA (OH)", "USA (OR)", "USA (PA 2)", "USA (TN)", "USA (TX 1)",
"USA (WA 1)", "USA (WA 2)", "Venezuela"), NULL))
)
 
rowMaxes <- function(x) apply(x, 1, max, na.rm = TRUE)
rowMedians <- function(x) apply(x, 1, median, na.rm = TRUE)
speeds <- speeds[order(names(speeds))]
 
# Find best speed for each mirror in each location
best <- lapply(speeds, rowMaxes)
in_one <- do.call("cbind", best)
 
# Compute relative speed of each mirror to the median
# (this hopefully removes the effect of geneeral internet speed)
rel <- apply(in_one, 2, function(x) x / median(x))
 
# For each mirror, find the average relative speed across all locations
out <- cbind(out, median = rowMedians(out))
round(out * 100) / 100
 
# Find the top 5 mirrors
top5 <- order(-out[, "median"])[1:5]
out[top5, "median", drop = F]

there is somthing wrong with out <- cbind(out, median = rowMedians(out)): out was not defined

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