bowenliang123/dsh-context v0.73.3

on GitHub

Install / Update

Install the dsh-context plugin on DeepSeek Harness with released NPM package:

dsh plugin --profile web add dsh-context@latest

Update the dsh-context plugin:

dsh plugin --profile web update dsh-context@latest

What's New

This is a performance release. On long sessions the Context tab now mounts and interacts several times cheaper: first paint is ~86% faster, the open no longer produces a main-thread long task, hover sweeps and DNA mode stop stacking full-view work, and the mounted DOM shrinks to about a quarter (a fifth with DNA). Every figure, tooltip, ordering, search, filter and DNA hit-test still reads the full data model — only rendering is windowed, so no readout or data path changed.

The work follows the #165 investigation. The 10s freeze reported there traced to a live-wallpaper compositing interaction rather than the plugin's data path, but the report's measurements exposed the plugin-side cost this release removes: every Context open mounted the full DOM for the whole session. Thanks @jidekaixin2dian for the reproduction data and the follow-up measurements.

Performance

• The Context tab renders only what is visible, and every readout still reads the full model (#167)

  Measured A/B on the same 987-step / 33-turn session (4.9 MB compressed log, same host and scripts; the baseline is a build of the released 2ee5c96, v0.73.2):

  Test site	Before (v0.73.2)	After	Change
  Context-tab first paint	475–587 ms	83–84 ms	−86%
  Open total (script window)	984–1128 ms	502–504 ms	−49%…−55%
  Open long tasks	2 (max 295–408 ms)	0	removed
  DOM after open	15,949	3,913	−75.5%
  Trend bars in DOM	987	145 (windowed)	−85%
  JS heap after open	61.6–67.6 MB	54.4–54.6 MB	−12%…−19%
  Hover ×30	30 long tasks / 2,425 ms	0 / 0 ms	removed
  Rapid window jumps ×20	0 LT / 987 bars	0 LT / 72 bars	DOM −93%
  DNA first bar visible	1,513 ms	317 ms	−79%
  DNA open long task	max 1,259 ms	max 164 ms	−87%
  DNA whole-page DOM	21,647	4,045	−81%
  DNA browser-card DOM	13,698	2,496	−82%
  DNA flat rows	1,156	29 + spacers	−97%
  DNA trend bars	987	38	−96%
  JS heap after 5 tab switches	80.22 MB	56.53 MB	−29.5%
  Heap growth (open → 5 switches)	+18.6 MB	+1.9 MB	−90%

  • Trend bars, File Activity rows, dense timing-strip segments and the DNA flat feed render only their visible window plus overscan, with spacer pads that reproduce the full scroll height exactly (including the container flex gap).
  • The browser card and the below-fold event/file row mount behind height-matched skeletons on an idle slice or when near the conversation viewport; stats file-pill jumps force the row in and reveal it.
  • DNA bands build lazily per rendered window for long total-mode logs, the DNA window is tightened, gradient stops are sampled (≤64 per bar) — and DNA+delta stays eager so its per-key churn bounds the axis exactly.
  • Pure derivations (assemble, DNA/file aggregation) are cached across hover renders and remounts; forced layout is removed from the flow/timing read paths; the hidden sidebar copy is gated, and the step-picker options and tool tallies are memoized.
  • Pointer hovers are isolated: the chart's own hover/tip stays instant, cross-card previews trail (140 ms; 220 ms in DNA mode) so a sweep cannot stack full-view renders.
  • Rendering-only by construction: axes, tooltips, ordering, DNA hit-testing and all totals still come from the full model, and Ctrl/Cmd-F-style searches, filters and selections still see the complete data.

Fixes

• DNA strands line up across bars again (#168) — the rework's gradient-stop cap sampled each bar's runs into a fixed number of equal parts, which broke the chart's long-standing invariant that every DNA bar shares one px-per-token scale, so a persistent band landed at a different offset in each column. Internal band boundaries now quantize to one shared 2px grid (the final boundary stays exact, same-colour runs merge, sub-grid slivers are absorbed); the tooltip, highlight and hit-testing still read the untouched band model.
• Copilot review follow-ups on the rendering rework (#169) — six confirmed findings, each verified against the source and covered by a regression test:
  • the /context modal now passes the active locale through, so memoized step labels re-translate while the dialog stays open;
  • the browser height-cap measurement and its ResizeObserver re-run after the hidden sidebar copy remounts;
  • DNA band hover reveal works for off-window rows again: feed rows carry data-lc-key, a key→index map scrolls the window into place, and the reveal runs after the commit;
  • File Activity only windows when every row measures the same height — wrapped long paths (95 rows at 41px and 48 at 29px on the 987-step session) made the fixed-pitch spacers too short; a mixed-height list now renders in full with a truthful 5,571px scroll height;
  • the chart tip re-clamps its width when a different DNA band changes the tooltip text;
  • a tiny DNA bar falls back to its top band's solid colour instead of emitting an empty gradient.

Changes

• Cross-card hover previews and the chart's request-detail link trail the pointer by 140 ms (220 ms in DNA mode) by design; the chart's own bar highlight and tip stay immediate.
• Folding the Sidebar unmounts the hidden Context copy (the source of the hidden-sidebar DOM cut): data and view-level state return on re-expand, but card-local UI state (open browser rows/search, file filters/expanded row, list scroll position) resets. The main-tab copy is unaffected.
• Windowing stays off where it cannot be truthful: narrow cards and mixed-height row lists render in full.
• Known limitation, deliberately deferred: adaptive mode plus the 2px DNA grid can retain very large gradients for off-window bars. The released implementation also kept every run, so this is pre-existing, not introduced here; resolving it means choosing between making DNA and adaptive mutually exclusive, scaling to the rendered window, or a coarse shared grid.
• pnpm run check --full at this tag: lint clean, typecheck clean, 138 files at 100% per-file coverage, 2,493 tests green.

Commits

• perf(context): cut context-tab render, hover and DNA costs (#167) (a694adf)
• fix(context): keep DNA strands aligned across bars (#168) (c786c51)
• fix(context): address Copilot review findings (#169) (92e50e9)
• chore(release): 0.73.3 (a7ce215)

v0.73.2...v0.73.3 · 4 commits

Contributors

• @bowenliang123