A guide to network throttling methods
DebugBear
Matt Zeunert
DebugBear
Why?
Match connection speed of real users
Consistent connection speed
Throttling methods
Browser-level
Packet-level
Simulated
HTTP request latency
High-latency connection
Browser-level
150ms round-trip time
1.6Mbps bandwidth
Minimum HTTP duration: 562ms
Response held back for 562ms - 200ms - 20ms = 342ms
HTTP roundtrip with 563ms throttling
Packet-level
comcast --device=eth0 --latency=150 --target-bw=1638
tc (traffic control) is the user-space utility program used to configure the Linux kernel packet scheduler.
sudo tc qdisc add dev eth0 root netem delay 75ms rate 1638kbit
Usability
Applies to all applications
Requires admin access
Commands are system-dependent
Simulated Throttling
Advantages
Fast
Low variability
Server response time test
Server response time test
7 Ajax requests
4 respond after 0.2s
3 respond after 10s
Median server response for the origin: 0.2s
