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  "origin": "https://www.msweet.net/notes/",
  "page": "726-fern-bitterns",
  "author": {
    "name": "Matthew McDowell-Sweet",
    "url": "https://www.msweet.net/"
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  "created": "2026-11-11T18:44:05Z",
  "updated": "2026-11-11T18:44:05Z",
  "version": 1,
  "content_md": "Speed has a quality all its own.\n\n> IBM, way back in the 80s, found that user productivity shot up \\*exponentially\\* as system response time dropped.  The \"Doherty Threshold\" was defined as ~400 milliseconds; the maximum amount of tolerable UX latency before interrupting user flow state.\n\n[lauriewired / Doherty Threshold (x.com) ↗](https://x.com/lauriewired/status/2120209911527412081)",
  "content_html": "<p>Speed has a quality all its own.</p>\n<blockquote><p>IBM, way back in the 80s, found that user productivity shot up *exponentially* as system response time dropped.  The &quot;Doherty Threshold&quot; was defined as ~400 milliseconds; the maximum amount of tolerable UX latency before interrupting user flow state.</p></blockquote>\n<p class=\"source\"><a href=\"https://x.com/lauriewired/status/2120209911527412081\">lauriewired / Doherty Threshold (x.com) ↗</a></p>",
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      "version": 1,
      "at": "2026-11-11T18:44:05Z",
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