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Comcast: Simulating shitty network connections so you can build better systems

github.com Software & code Software projects Software engineering Candidate
Screenshot of github.com captured 2026-07-20
Page preview · captured 2026-07-20

Resurfaced independently across 4 calendar years, with breakout response in 2 of them.

submissions
4
submitters
4
observed span
2014–2022
peak thread · 138 comments
370 pts
latest 20+ return · 2022-07-16
370 pts

Submission timeline

2007–2026

One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.

First comments on top threads

HN comment order

The greatest part of this project is that if you ever get sued for trademark infringement, you can force their lawyers to have to explain why anyone could possibly confuse the product of Comcast Corp. with making your internet as flakey and slow as possible.

lostdog·370-point thread·

Nice. It'd be neat to include options to simulate other pathological conditions often encountered in the field like: - Multiple layers of NAT - overlapping un-synchronized timeouts are one thing ... but the REAL fun comes in when intermediate layers have the same IP ranges as IPs you are trying to reach on the "outside" of the NAT sandwich. All kinds of "interesting" things can happen, like the "software laser": http://catb.org/jargon/html/S/software-laser.html - Stateful NATs/firewalls with bizarrely short…

api·330-point thread·

The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.

Breakout years
2

100+ points or 50+ comments

Total points
705

reference only — not used in Hall rules or ranking

Total comments
218

reference only — not used in Hall rules or ranking

Every submission