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Simon Eskildsen
13.8K posts
user avatar
Simon Eskildsen
@Sirupsen
co-founder & ceo @turbopuffer, former infra @Shopify 1k→1m RPS
🇩🇰 → 🍁🇨🇦🌲
sirupsen.com
Joined April 2009
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  • user avatar
    Simon Eskildsen
    @Sirupsen
    Jun 26, 2023
    1. Find big scary equation that's hard to parse 2. Latex OCR it with Mathpix 3. Ask ChatGPT to break it down into heavily commented Python
    798K
  • user avatar
    Simon Eskildsen
    @Sirupsen
    Oct 4, 2023
    After 4 months of focused work, I'm launching what is, to my knowledge, the first truly serverless vector database: turbopuffer.com $1/month per million vectors (10-70x cheaper than others) $4 per million queries
    391K
  • user avatar
    Simon Eskildsen
    @Sirupsen
    Oct 4, 2025
    2 years ago today. Imagine what we'll do in the next 2.
    user avatar
    Simon Eskildsen
    @Sirupsen
    Oct 4, 2023
    After 4 months of focused work, I'm launching what is, to my knowledge, the first truly serverless vector database: turbopuffer.com $1/month per million vectors (10-70x cheaper than others) $4 per million queries
    111K
  • user avatar
    Simon Eskildsen
    @Sirupsen
    Jun 28, 2025
    nothing taught me more about how software ages than staying in place at Shopify for 8y underrated & under-practised
    87K
  • user avatar
    Simon Eskildsen
    @Sirupsen
    Jan 31, 2020
    As of this morning I am Danish-CANADIAN!
  • user avatar
    Simon Eskildsen
    @Sirupsen
    Apr 12, 2025
    any database is just a WAL with indexes then it’s down to tradeoffs in guarantees, storage and indexes
    16K
  • user avatar
    Simon Eskildsen
    @Sirupsen
    Jun 1, 2021
    Last week I closed out an epic 8-year chapter of my life, with my last day at Shopify: Moved to the New World, built incredible things with a stellar team, made amazing friends, met my fiancé, and became a Canadian citizen 🇨🇦 Next up: a summer of paddling and @ComputerNapkins
  • user avatar
    Simon Eskildsen
    @Sirupsen
    Aug 29, 2024
    how ppl think you get perf: io_uring how you get e2e perf: napkin math, trace everything, simplify everything, tune TCP (for real), tune LB, hedging, profile client lib
    25K
  • user avatar
    Simon Eskildsen
    @Sirupsen
    Feb 1, 2024
    would've killed for this at shopify. schema changes PRs is ❤️‍🔥 😘 @PlanetScale
    46K
  • user avatar
    Simon Eskildsen
    @Sirupsen
    Nov 7, 2025
    turbopuffer the fashion brand might become bigger than the database
    user avatar
    Jordi Hays
    TBPN
    @jordihays
    Nov 7, 2025
    they asked what I'd do if I never made a @turbopuffer puffer jacket. I guess we'll never know
    65K
  • user avatar
    Simon Eskildsen
    @Sirupsen
    Jul 19, 2024
    nothing better than a graph like this in production p99: 2.3s → 100ms p90: 400ms → 85ms p50: 250ms → 65ms by moving to zero-copy on an auxiliary data-structure mostly used out-of-band for e.g. billing
    17K
  • user avatar
    Simon Eskildsen
    @Sirupsen
    Oct 29, 2019
    Reaching 1 million merchants on Shopify is just bonkers. That’s how many people live here in Ottawa. The only real sense of scale I can get is imagining walking door to door in this city and everyone is a merchant. Mind-boggling.
  • user avatar
    Simon Eskildsen
    @Sirupsen
    Nov 25, 2024
    S3 has finally added `put-if-match` for compare-and-swap! Expect AWS turbopuffer regions very soon aws.amazon.com/about-aws/what…
    23K
  • user avatar
    Simon Eskildsen
    @Sirupsen
    Jan 7, 2020
    Even zippers were controversial!