docs(blog): the leak that wasn't in any Context#620
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Blog post tracing the IntersectionObserver / BufferLine retention story — wrong turn in #614, byte-delta heap diff as the pivot, the one-line WeakRef patch in xtermjs/xterm.js#5821. Written in the voice of the debugging-story canon: cold open on the symptom, the wrong turns compressed rather than storied, anticlimactic fix. Targets readers from backend / systems backgrounds who may not be fluent in web-frontend memory tooling — links to MDN and Chrome DevTools docs for the web-specific concepts. Credit: I drove; Claude Code (https://claude.com/claude-code) did the agent-side work. Under docs/perf-investigations/ alongside the technical chapters in memory-learnings.md.
This was referenced Apr 21, 2026
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Draft blog post for review. Push revisions as additional commits for iteration.
Preview on GitHub by clicking the file in the diff, or view raw for a cleaner markdown render:
Shape of the post:
Contextcount proxy on perf(memory): cut canvas-toggle retention (-89% Contexts, -91% SVG bytes) #614, 89% reduction, zero Task Manager movementperformance.memoryfor readers who aren't web-perf fluentAttribution: I drove; Claude Code did the agent-side work.
Not for merge as-is — draft is to iterate on wording before deciding where it's actually published.