RoobLi

  • Essays
    • An unchecked todo
    • Why America builds productivity tools
    • Apple product design as physics
    • Keyboard shortcut systems
    • You can finish a CUDA course without a GPU
  • Series
    • Kernels from zero
      • 01A kernel that is correct
      • 02Coalescing: what 32 threads ask of memory
      • 03Shared memory and the bank conflict
      • 04Occupancy and the tile shape
      • 05Measuring it for real, with Nsight Compute
  • Projects
    • CUDA C++ Course
  • Notes
    • Every old URL still worksSep 28
    • Reading time is counted, not guessedSep 28
    • The sidebar now knows what it listsSep 28
  • About

RoobLi/Notes

Notes

Short and dated: a finding, a method, a decision and why. Lighter than an essay.

Notes
03
Since
Sep 28, 2026
  1. Sep 28, 2026

    Every old URL still works

    Essays moved from /writing/ to /essays/ and projects from /works/ to /projects/. Every earlier address still leads to its page in one hop, and the feed keeps the moved pages' old item IDs, so readers are not shown them again.

  2. Sep 28, 2026

    Reading time is counted, not guessed

    The minutes on every page come from the page itself: words counted from the rendered text, code and math included, at 200 a minute, or Han characters at 400 a minute on Chinese pages.

  3. Sep 28, 2026

    The sidebar now knows what it lists

    The tree beside every page used to be built in the browser from an index of titles and links. It is now rendered with the page, from the same data as the index, so it can show a series' progress, a note's date and a project's status.

3 items under this folder.

  • Sep 28, 2026

    Every old URL still works

  • Sep 28, 2026

    Reading time is counted, not guessed

  • Sep 28, 2026

    The sidebar now knows what it lists


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