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Implement a new multi-threaded SAB pull scheduler#171

Merged

KubaO merged 72 commits into

twinbasic:maintwinbasic/documentation:mainfrom

KubaO:stagingKubaO/twinBASIC-docs:stagingCopy head branch name to clipboard

Jun 2, 2026

Conversation Commits72 (72)Checks Files changed

Merged

Implement a new multi-threaded SAB pull scheduler#171
KubaO merged 72 commits into
twinbasic:mainfrom
KubaO:staging

Commits

Commits on May 30, 2026

Plan a new scheduler + dataflow DAG.
KubaO
committed
Scheduler Phase 0: skeleton + small refactors
KubaO
committed
Scheduler Phase 1: seeds + main-thread spine
KubaO
committed
Scheduler Phase 2: render fan-out across worker threads
KubaO
committed
Scheduler Phase 3: write + post-write tasks
KubaO
committed
Scheduler Phase 4: SAB broadcast for render fan-out
KubaO
committed
Close out the scheduler work.
KubaO
committed
Update the scheduler documentation.
KubaO
committed
Factor out prepDest and start it immediately. Factor out writePdf.
KubaO
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SearchData really requires renderJoin and prepDest, not Write.
KubaO
committed
Add the plan to move the offline rewriter to workers.
KubaO
committed
Phase I: extract pure-compute offline rewrite into offline-rewrite.mjs
KubaO
committed
Phase II: expand dispatch deps, compute sitePaths, expand SAB payload
KubaO
committed
Phase III: run offline rewrite in render workers
KubaO
committed
Phase IV: switch writeOffline to pre-computed HTML
KubaO
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Phase V: documentation for offline-rewrite-in-workers
KubaO
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Make the build console output colorful.
KubaO
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Output a Gantt chart of the build.
KubaO
committed
Move Shiki WASM init to a no-dep seed task (highlighterInit)
KubaO
committed
Split scss into scssLight + scssDark workers to parallelize compilation
KubaO
committed
Hide ...Join tasks from Gantt chart
KubaO
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Write serve Gantt to serve-gantt.mmd, separate from build-gantt.mmd
KubaO
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Annotate render Gantt bars with compute efficiency percentage
KubaO
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Extend compute efficiency annotation to all worker tasks
KubaO
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Show queue+compute split in worker task Gantt labels.
KubaO
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Move loadData/resolveBookChapters earlier in task DAG
KubaO
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highlighterInit stores CSS directly; markdownInit depends only on discover
KubaO
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Move resolveBookChapters dependency from dispatch to writePdf
KubaO
committed
Defer deriveSitemap to after dispatch to reduce spine contention
KubaO
committed
Defer resolveBookChapters to after deriveSitemap (idle window)
KubaO
committed
Split buildInit: sidebar into nav, config chrome runs after discover
KubaO
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Chain config->highlighterInit->loadData to fill discover I/O window
KubaO
committed

Commits on May 31, 2026

Centralise dest-dir wipe in prepareDestinations for all three output trees
KubaO
committed
Defer prepDest to after dispatch to avoid I/O contention with discover
KubaO
committed
Chain mermaid after buildInfo to reduce seed-phase CPU contention on CI
KubaO
committed
Slice render chunks 10x finer for balanced worker utilisation
KubaO
committed
Defer Shiki init so critical-path seeds run without contention
KubaO
committed
Prefer Shiki-warm workers for render dispatch; seed mermaid when cores > 4
KubaO
committed
Log changed files at rebuild time in serve mode
KubaO
committed
Draw the Gantt chart ourselves without Mermaid.
KubaO
committed
Make task time accounting finer-grained.
KubaO
committed
Fix a bug in serve mode that made it detect its own writes as file changes.
KubaO
committed

Commits on Jun 1, 2026

Stop writing the Gantt .mmd file; the SVG is the only output.
KubaO
committed
Plan the SharedArrayBuffer (SAB)-based scheduler.
KubaO
committed
Add SAB scheduler skeleton (Phase 5).
KubaO
committed
Implement SAB worker pull loop (Phase 6).
KubaO
committed
Integrate main-thread tasks into the SAB scheduler (Phase 7).
KubaO
committed
Remove push-model dead code from WorkerPool (Phase 8).
KubaO
committed
Add speculative idle execution for warmInit (Phase 9).
KubaO
committed
Plan phases 10 and 11 of the SAB scheduler.
KubaO
committed
Extract renderEnvInit as explicit per-worker task (Phase 10).
KubaO
committed
Update the plan - phase 11 is a no-go.
KubaO
committed
Update the Gantt chart formatting.
KubaO
committed
Pre-create page output dirs during render window (prepPageDirs).
KubaO
committed
Per-worker page flush, replacing renderJoin barrier (Phase 12).
KubaO
committed
Gantt formatting changes.
KubaO
committed
Move the flushJoin dependency to writeAux.
KubaO
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Plan phase 13 to capture uniform task timing.
KubaO
committed
scss task writes combined CSS directly to both site trees.
KubaO
committed
Reintroduce renderJoin barrier; searchData depends on it, not flushJoin.
KubaO
committed
Plan a deferred phase 14 for moving writePdf off the main thread.
KubaO
committed
Add more timing information to the Gannt and make it zoomable/saveable/copyable.
KubaO
committed
Make the Gantt chart also available as a PNG.
KubaO
committed
Add more phases to the SAB scheduler plan.
KubaO
committed
Implement Phase 15: generic dynamic tasks and per-chunk flush.
KubaO
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Update phases 16, 17 and 18 based on the just finished phase 16.
KubaO
committed

Commits on Jun 2, 2026

Implement Phase 16: persistent worker pool and survives_reset.
KubaO
committed
Implement Phase 17: distribute search-data derivation to render workers.
KubaO
committed
Implement Phase 18: move per-page SEO to render workers.
KubaO
committed
Update the Dagre patch to make layout direction optional in subgraphs.
KubaO
committed
Update the `tbdocs` documentation.
KubaO
committed
Add dot as a dependency for graphs, remove Mermaid.
KubaO
committed

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