digitalocean上綫美國舊金山SFO3數據中心，附測試數據

wget -qO- bench.sh | bash
CPU model            : Intel(R) Xeon(R) Gold 6140 CPU @ 2.30GHz
Number of cores      : 1
CPU frequency        : 2294.608 MHz
Total size of Disk   : 25.1 GB (1.5 GB Used)
Total amount of Mem  : 985 MB (95 MB Used)
Total amount of Swap : 0 MB (0 MB Used)
System uptime        : 0 days, 21 hour 52 min
Load average         : 0.00, 0.00, 0.00
OS                   : Ubuntu 18.04.4 LTS
Arch                 : x86_64 (64 Bit)
Kernel               : 4.15.0-66-generic
----------------------------------------------------------------------
I/O speed(1st run)   : 639 MB/s
I/O speed(2nd run)   : 646 MB/s
I/O speed(3rd run)   : 615 MB/s
Average I/O speed    : 633.3 MB/s
----------------------------------------------------------------------
Node Name                       IPv4 address            Download Speed
CacheFly                        205.234.175.175         177MB/s       
Linode, Tokyo2, JP              139.162.65.37           20.5MB/s      
Linode, Singapore, SG           139.162.23.4            11.1MB/s      
Linode, London, UK              176.58.107.39           16.0MB/s      
Linode, Frankfurt, DE           139.162.130.8           11.3MB/s      
Linode, Fremont, CA             50.116.14.9             141MB/s       
Softlayer, Dallas, TX           173.192.68.18           47.0MB/s      
Softlayer, Seattle, WA          67.228.112.250          76.5MB/s      
Softlayer, Frankfurt, DE        159.122.69.4            5.23MB/s      
Softlayer, Singapore, SG        119.81.28.170           8.98MB/s      
Softlayer, HongKong, CN         119.81.130.170          11.8MB/s      
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