| author: | Wojciech Muła |
|---|---|
| added on: | 2022-01-29 |
Every year in January I download the Apache logs for my home page. I run a simple script on the logs to see which articles were popular last year. Sometimes I'm surprised that some old stuff is still being read.
The script counts the total number of visits and the unique number of visitors. And this year something strange happened. Below is the head of list:
total uniq 651522 7864 /notesen/2021-12-22-test-and-clear-bit.html 9008 5142 /articles/simd-strfind.html 5478 3521 /notesen/2019-01-07-cpp-read-file.html 4414 3348 /notesen/2021-01-18-autovectorization-gcc-clang.html 3773 2008 /articles/simd-parsing-int-sequences.html 3270 1897 /notesen/2018-10-03-simd-index-of-min.html 2948 1870 /notesen/2019-02-02-autovectorization-gcc-clang.html 3539 1825 /articles/index.html 3843 1617 /articles/sse-popcount.html 1908 1287 /notesen/2021-03-11-any-word-is-zero.html 1982 1244 /notesen/2016-01-12-sse-base64-encoding.html 2202 1229 /articles/simd-byte-lookup.html 2060 1220 /notesen/2018-10-24-sse-sumbytes.html 2072 1202 /notesen/2021-02-02-all-bytes-in-reg-are-equal.html 1998 1103 /articles/avx512-ternary-functions.html
The trend is clear — a thousand visits is normal, few thousands is something very popular. But the top article got visited 600 thousands times! It was added on Hacker News, but never hit its main page (gained only ~30 upvotes).
Below is a daily number of visits:
/notesen/2021-12-22-test-and-clear-bit.html 2021-12-22: 360 2021-12-23: 69468 ============================= 2021-12-24: 141027 ============================================================ 2021-12-25: 138335 ========================================================== 2021-12-26: 137856 ========================================================== 2021-12-27: 136672 ========================================================== 2021-12-28: 27736 =========== 2021-12-29: 37 2021-12-30: 17 2021-12-31: 14 total: 651522
For whole four days, every ~2 seconds, somebody performed HTTP GET on this very URL.
I collected the IPs visiting the article. Almost all of the IPs are registered by Amazon Web Services.
Below is the detailed histogram of visits per IP. An catching-eye pattern is that the number of visits is shared across groups of different IPs. Looks like somebody did a silly synchronisation mistake and let workers pick the same same job over and over.
count IP 5724 44.201.39.42 5724 3.94.193.105 4770 44.201.33.147 3816 54.91.111.64 3816 54.84.75.180 3816 54.221.21.59 3816 54.196.220.147 3816 54.175.245.212 3816 44.192.16.27 3816 3.87.247.68 3816 3.80.213.10 3816 3.237.21.87 3816 3.236.190.167 3816 3.236.104.169 3816 3.235.181.101 3816 18.204.227.120 2862 54.87.77.182 2862 54.85.161.10 2862 54.221.43.86 2862 54.209.115.198 2862 54.164.131.116 2862 54.161.64.49 2862 52.91.89.169 2862 52.87.191.130 2862 52.21.158.202 2862 44.200.72.132 2862 44.200.26.192 2862 44.200.187.40 2862 44.200.143.177 2862 44.197.188.220 2862 3.90.183.142 2862 3.88.173.14 2862 3.85.125.218 2862 3.84.155.160 2862 34.239.146.120 2862 34.228.40.63 2862 3.239.96.83 2862 3.239.219.229 2862 3.236.241.160 2862 3.236.207.16 2862 3.236.141.1 2862 3.236.131.194 2862 3.236.119.211 2862 3.233.219.239 2862 3.230.127.79 2862 3.227.254.57 2862 3.227.235.211 2862 3.227.11.80 2862 3.226.76.105 2862 3.220.231.2 2862 3.216.79.148 2862 18.233.148.19 2862 18.215.147.137 2862 18.214.37.67 2862 18.207.252.143 2862 18.205.159.11 2862 100.26.61.210 2862 100.26.185.13 1909 3.236.27.213 1908 54.242.255.17 1908 54.242.228.33 1908 54.242.163.248 1908 54.236.36.193 1908 54.205.82.147 1908 54.175.4.154 1908 54.174.240.173 1908 54.174.150.40 1908 54.172.41.64 1908 54.167.8.206 1908 54.167.39.17 1908 54.166.44.219 1908 54.161.206.139 1908 54.160.234.43 1908 54.159.84.255 1908 54.147.117.226 1908 50.19.161.70 1908 44.201.62.226 1908 44.201.58.131 1908 44.200.86.209 1908 44.200.65.76 1908 44.200.40.176 1908 44.200.239.183 1908 44.200.230.223 1908 44.200.227.211 1908 44.200.205.85 1908 44.200.188.45 1908 44.200.173.245 1908 44.200.171.203 1908 44.199.232.199 1908 44.197.133.168 1908 44.195.38.186 1908 44.193.83.155 1908 44.192.82.83 1908 44.192.58.57 1908 44.192.38.32 1908 44.192.131.229 1908 3.95.182.93 1908 3.95.179.4 1908 3.92.88.127 1908 3.92.190.61 1908 3.91.63.171 1908 3.91.132.53 1908 3.89.228.171 1908 3.89.141.217 1908 3.88.7.101 1908 3.88.66.222 1908 3.88.40.185 1908 3.87.80.192 1908 3.86.216.188 1908 3.85.59.14 1908 3.85.224.21 1908 3.85.162.102 1908 3.85.13.203 1908 3.84.19.250 1908 3.83.133.228 1908 3.80.68.17 1908 35.175.110.3 1908 35.174.4.162 1908 35.173.1.105 1908 35.171.146.181 1908 35.170.198.64 1908 35.168.58.80 1908 35.168.23.194 1908 35.153.39.124 1908 34.238.193.239 1908 34.236.171.38 1908 34.236.144.152 1908 34.231.21.251 1908 34.230.79.25 1908 34.229.193.190 1908 34.228.141.13 1908 34.227.111.192 1908 34.205.4.165 1908 34.201.24.65 1908 34.201.21.89 1908 34.200.237.89 1908 3.239.98.150 1908 3.239.27.216 1908 3.239.236.9 1908 3.239.195.119 1908 3.238.30.227 1908 3.238.28.93 1908 3.238.239.14 1908 3.238.233.181 1908 3.238.149.106 1908 3.237.30.128 1908 3.237.28.58 1908 3.237.197.197 1908 3.236.88.202 1908 3.236.29.198 1908 3.236.172.81 1908 3.236.113.37 1908 3.235.232.232 1908 3.234.141.7 1908 3.231.60.92 1908 3.231.219.59 1908 3.231.208.60 1908 3.227.252.65 1908 3.221.155.113 1908 3.210.205.79 1908 3.209.12.110 1908 23.20.132.70 1908 184.73.60.65 1908 184.73.57.197 1908 18.234.236.146 1908 18.234.111.35 1908 18.213.118.61 1908 18.212.159.84 1908 18.209.237.95 1908 18.208.249.16 1908 18.208.209.143 1908 18.207.104.102 1908 18.207.100.231 1908 18.206.228.51 1908 18.205.238.85 1908 18.205.107.9 1908 18.204.35.218 1908 18.204.215.122 1908 18.204.17.190 1908 100.26.147.44 1908 100.24.45.26 1908 100.24.18.194 955 44.200.107.134 954 54.91.114.177 954 54.90.80.165 954 54.90.201.186 954 54.90.124.119 954 54.89.101.235 954 54.88.23.164 954 54.86.217.46 954 54.86.115.15 954 54.83.241.217 954 54.82.90.177 954 54.82.164.242 954 54.242.227.105 954 54.242.140.162 954 54.236.217.111 954 54.227.40.231 954 54.226.62.158 954 54.226.122.88 954 54.226.0.34 954 54.221.180.78 954 54.211.152.69 954 54.209.207.116 954 54.209.189.47 954 54.208.171.144 954 54.175.53.23 954 54.175.195.174 954 54.174.44.66 954 54.166.7.228 954 54.166.159.234 954 54.163.187.47 954 54.160.0.105 954 54.157.193.120 954 54.152.146.248 954 54.145.24.108 954 54.145.223.209 954 52.91.93.152 954 52.91.61.246 954 52.91.226.148 954 52.91.196.215 954 52.90.54.249 954 52.90.3.62 954 52.90.192.144 954 52.87.250.143 954 52.87.249.92 954 52.72.121.162 954 52.55.65.234 954 52.23.167.2 954 52.23.158.119 954 52.207.62.132 954 52.207.250.70 954 52.207.228.111 954 52.202.9.106 954 50.19.41.32 954 44.201.7.198 954 44.201.5.78 954 44.201.56.67 954 44.201.34.223 954 44.201.31.199 954 44.201.3.1 954 44.201.18.138 954 44.201.10.172 954 44.201.0.117 954 44.200.53.196 954 44.200.50.199 954 44.200.40.24 954 44.200.39.160 954 44.200.32.176 954 44.200.251.208 954 44.200.228.186 954 44.200.218.184 954 44.200.195.52 954 44.200.144.107 954 44.200.143.106 954 44.200.137.243 954 44.200.112.188 954 44.199.250.90 954 44.199.236.15 954 44.198.59.240 954 44.197.250.137 954 44.197.245.138 954 44.193.2.184 954 44.192.84.100 954 44.192.76.80 954 44.192.57.38 954 3.94.202.83 954 3.93.81.203 954 3.92.45.247 954 3.92.217.211 954 3.92.207.122 954 3.92.132.193 954 3.91.55.178 954 3.91.45.166 954 3.91.219.210 954 3.89.55.35 954 3.89.223.189 954 3.89.101.5 954 3.88.173.142 954 3.87.219.112 954 3.87.201.92 954 3.87.152.148 954 3.85.241.232 954 3.85.13.102 954 3.84.30.31 954 3.83.161.181 954 3.82.139.5 954 3.80.79.219 954 3.80.5.219 954 3.80.220.39 954 3.80.118.234 954 35.175.200.233 954 35.173.48.63 954 35.173.47.212 954 35.173.250.34 954 35.173.134.240 954 35.172.219.110 954 35.172.217.161 954 35.170.73.138 954 35.170.64.84 954 34.239.175.219 954 34.239.130.54 954 34.239.125.189 954 34.238.83.186 954 34.238.247.118 954 34.238.151.112 954 34.236.143.245 954 34.234.223.149 954 34.230.80.248 954 34.229.175.140 954 34.229.172.210 954 34.229.168.118 954 34.228.143.140 954 34.227.11.197 954 34.227.110.19 954 34.224.41.142 954 34.224.21.214 954 34.207.93.237 954 34.204.200.137 954 34.204.189.163 954 34.204.186.183 954 34.203.245.120 954 34.203.200.103 954 34.203.199.145 954 34.203.14.139 954 34.200.222.190 954 3.239.79.175 954 3.239.76.99 954 3.239.51.238 954 3.239.119.61 954 3.239.116.62 954 3.239.11.11 954 3.238.249.185 954 3.238.244.136 954 3.238.23.31 954 3.238.228.216 954 3.238.221.170 954 3.238.194.160 954 3.238.177.225 954 3.238.150.175 954 3.238.13.205 954 3.238.113.12 954 3.237.238.142 954 3.237.10.223 954 3.237.10.2 954 3.237.10.145 954 3.236.80.163 954 3.236.54.153 954 3.236.16.119 954 3.236.142.65 954 3.236.121.4 954 3.236.120.156 954 3.236.115.165 954 3.236.101.79 954 3.235.226.5 954 3.235.199.76 954 3.235.193.114 954 3.235.192.58 954 3.235.182.96 954 3.235.178.120 954 3.234.244.141 954 3.234.239.170 954 3.233.241.219 954 3.233.234.70 954 3.231.21.251 954 3.230.159.197 954 3.227.242.133 954 3.227.11.186 954 3.224.147.147 954 3.223.3.71 954 3.223.195.119 954 3.219.217.120 954 3.215.22.124 954 3.209.10.196 954 3.208.15.210 954 184.72.114.127 954 18.234.227.246 954 18.234.139.137 954 18.232.54.171 954 18.232.177.100 954 18.215.63.197 954 18.215.189.70 954 18.215.163.85 954 18.215.159.83 954 18.214.26.230 954 18.212.242.2 954 18.209.59.182 954 18.208.195.208 954 18.208.148.189 954 18.207.241.17 954 18.207.160.105 954 18.207.143.8 954 18.207.129.148 954 18.206.254.83 954 18.206.16.17 954 18.205.105.108 954 107.22.155.204 954 107.22.134.56 954 107.21.166.150 954 100.27.49.48 954 100.27.21.180 954 100.26.35.56 954 100.26.185.73 954 100.24.25.254 954 100.24.21.216 954 100.24.209.103 240 34.226.188.26 238 3.218.212.35 228 158.69.195.206 173 35.203.245.218 124 136.243.70.68
The end. :)