{"generated_at":"2026-11-12T18:35:16.890Z","source":{"name":"Hacker News public API","url":"https://github.com/HackerNews/API","attribution":"Stories and comments are public Hacker News submissions by their respective authors. HackerHub is an independent reader, not affiliated with Y Combinator.","content_is_untrusted":true},"story_id":50470445,"hn_url":"https://news.ycombinator.com/item?id=50470445","total_comments":11,"returned":4,"scope":"Up to the requested number of top-level comments in Hacker News ranked order. Deleted comments are omitted. Nested replies are not fetched; this is not the complete thread.","comments":[{"id":50471808,"author":"perpil","created_at":"2026-11-12T18:25:03.000Z","text":"It isn't clear what you mean by this: \"The cold-start comparison has only two paired samples\" Are you saying these results are based on a sample size of 2 coldstarts? If so, that's way too small to draw any conclusions. I don't know whether the web functions fleet is currently homogeneous, but I know that for ARM, the event functions fleet has a mix of Graviton2/3/4 of varying percentages. You probably need a sample size of at least 100 for each cpu generation to see trends.\nIt's not documented but if you make one request with event functions, the Lambda runtime lives for about 7 minutes before it's reaped. I assume this is why the Web Function bills you for about 7 minutes of memory, it needs to hold that memory while it's running in case another request comes in. If you have a lot of rarely invoked functions, it is cheaper to use Lambda Event Functions. There you'll pay for GB/s for the duration of your function.\nFor Event Functions with node, your best possible E2E coldstart time with an AWS service call is sub 500 ms https://speedrun.nobackspacecrew.com/blog/2025/07/21/the-fas... I have not benchmarked web functions yet, but if they are running on the same infrastructure, I would assume the lower limit is similar.","parent_id":50470445,"replies_count":0,"hn_url":"https://news.ycombinator.com/item?id=50471808"},{"id":50470923,"author":"netik","created_at":"2026-11-12T17:29:50.000Z","text":"This a bit of a “yeah, so?” Statement.\nYou can configure teardown and minimum workers, and with a busy site, most of the time requests aren’t going to stop enough for this to matter.","parent_id":50470445,"replies_count":1,"hn_url":"https://news.ycombinator.com/item?id=50470923"},{"id":50470830,"author":"catlifeonmars","created_at":"2026-11-12T17:24:06.000Z","text":"Does the ~7 minutes get amortized over sustained load (due to container reuse)? I feel like the article doesn’t consider the shape of the traffic and workloads in its analysis of why lambda is not a good fit.","parent_id":50470445,"replies_count":1,"hn_url":"https://news.ycombinator.com/item?id=50470830"},{"id":50470698,"author":"hoppp","created_at":"2026-11-12T17:15:39.000Z","text":"Isn't that a configurable parameter?","parent_id":50470445,"replies_count":2,"hn_url":"https://news.ycombinator.com/item?id=50470698"}]}