Double Buffering with Cloudflare Queues
bellone.com33 points by b_llc 3 days ago
33 points by b_llc 3 days ago
A stateless pattern I use to batch telemetry at the edge while driving Cloudflare write costs to zero.
Cool pattern. Critics will say “falsehoods programmers believe about time” but it’s a cloud service, any time oddity that would break this would also break a lot more important stuff, so it’s fine.
Ugly code though.
// env
QUEUES = [EVEN_QUEUE, ODD_QUEUE]
// producers
env.QUEUES[hour % 2].send …
// consumer
env.QUEUES[1 + hour % 2]> env.QUEUES[1 + hour % 2]
// results in index 1 or 2 as js has precedence for */% over +-
So something like the following, for your desired visual succinctness? ...
env.QUEUES[hour % 2 ^ 1]
// results in desired js index 0 or 1
I wonder if any of you using AI code assistance regularly might tell an old hack like me if your code review tools would have caught such a bug?