Speed tests for each data center can use up to 100MB of data. Be careful if your ISP caps your data usage!
Files are downloaded via HTTP (not HTTPS) to get pure speed without encryption overhead.
If it looks like the script has crashed, the current test is probably just taking a while — especially when testing far-away regions. If you already know that testing other continents is futile, just remove them from the for loops in speed.sh.
AWS and GCP tests courtesy of CloudHarmony.
Tests can always be influenced by outside variables. Run the scripts multiple times if you want to ensure accuracy. Obviously, evil throttling ISPs can mess up the results too.

Usage:

If you trust me, these commands will download and run the scripts automatically:

wget -qO - https://raw.githubusercontent.com/jakejarvis/datacenter-speed-tests/master/ping.sh | bash
wget -qO - https://raw.githubusercontent.com/jakejarvis/datacenter-speed-tests/master/speed.sh | bash

Or, clone the repository and make sure you make the scripts executable before running:

git clone https://github.com/jakejarvis/datacenter-speed-tests.git
cd datacenter-speed-tests
chmod +x ping.sh && chmod +x speed.sh
./ping.sh
./speed.sh

Data centers:

Scripts will test speed and pings to the following data centers:

DigitalOcean: (locations)

NYC1
NYC2
NYC3
SFO1
SFO2
TOR1
LON1
FRA1
AMS2
AMS3
SGP1
BLR1

Linode: (locations)

Newark
Atlanta
Dallas
Fremont
London
Frankfurt
Singapore
Tokyo

Amazon Web Services: (locations)

us-east-1
us-west-1
us-west-2
ca-central-1
eu-north-1
eu-central-1
eu-west-1
eu-west-2
eu-west-3
ap-northeast-1
ap-south-1
ap-southeast-1
ap-southeast-2
sa-east-1

Google Cloud: (locations)

us-east1
us-east4
us-west1
us-central1
northamerica-northeast1
asia-east1
asia-east2
asia-northeast1
asia-south1
asia-southeast1
australia-southeast1
europe-north1
europe-west1
europe-west2
europe-west3
europe-west4
southamerica-east1

Vultr/Choopa: (locations)

nj-us
il-us
ga-us
fl-us
tx-us
sjo-ca-us
lax-ca-us (down at time of commit)
wa-us
tor-ca
fra-de
ams-nl
par-fr
lon-gb
syd-au
sgp
hnd-jp

Screenshots:

Inspired by https://www.reddit.com/r/webdev/comments/6ylmki/heres_an_easy_way_to_find_the_nearest/