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/Essays

Essays

Long pieces with sources, often with live figures and a Chinese version.

Essays
05
First
Sep 11, 2026
Latest
Sep 28, 2026
Live figures
07
In 中文
03
  1. No.DateEntryReading
  2. 005Sep 28, 2026

    An unchecked todo

    A reminder I set for myself, an essay scolding the young for their philosophy habit, and a message calling someone a “desperate illiterate.” I looked at the three of them together for a long time and came away without a conclusion.

    7 min · 中文
  3. 004Sep 15, 2026

    Why America builds productivity tools

    Not ‘America loves Todoist.’ English-speaking professional strata, expensive labor, and ARR capital built a symptom market: micro-control for sale, responsibility sunk onto the self.

    34 min · 中文
  4. 003Sep 11, 2026

    Apple product design as physics — springs, squircles, and hinge torque

    Rubber-band bounce, continuous corners, and one-handed MacBook open are not taste. They are damping ratios, G2 curvature, and rigid-body torque inequalities you can model.

    24 min · 3 live figures
  5. 002Sep 11, 2026

    Keyboard shortcut systems — design, history, and a shared grammar

    From Emacs prefixes and vi modes to Spotlight, command palettes, and Cmd+K: why power users treat keybindings as a namespace, and how KeyCombiner turns that into a practice system.

    7 min · 2 live figures · 中文
  6. 001Sep 11, 2026

    You can finish a CUDA course without a GPU — if the course is designed for it

    What “no GPU required” actually covers, what each of the four browser labs deliberately cuts, and when you still need a real card and Nsight.

    10 min · 2 live figures

5 items under this folder.

  • Sep 28, 2026

    An unchecked todo

  • Sep 15, 2026

    Why America builds productivity tools

  • Sep 11, 2026

    Apple product design as physics — springs, squircles, and hinge torque

  • Sep 11, 2026

    You can finish a CUDA course without a GPU — if the course is designed for it

  • Sep 11, 2026

    Keyboard shortcut systems — design, history, and a shared grammar


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