russell@unturf.com
1b7de2c9c6
User-visible changes
- Cancel button — terminates the running worker. Pyodide's slow mandelbrot
no longer freezes the UI; click cancel and the elapsed counter freezes
at "(cancelled @ NNNN ms)".
- Live ms counter ticks per animation frame while a tier is busy, so the
Pyodide tier's ~5-15 s wait is visible instead of looking hung.
- Restyled to match lumbda.com: chunkfive wordmark, --green: #227842
(light) / #5ec07a (dark), lumbda-logo-green.png, lowercase "lumbda"
everywhere. Pulls fonts/chunkfive locally so the playground stays
self-contained.
Architecture
- All tier evaluations now run inside a Web Worker (wasm/app/worker.mjs)
so the main thread stays responsive. Cancel = worker.terminate(); next
eval respawns a fresh worker.
- Loaders use new URL("./...", import.meta.url) so paths resolve against
the loader file's own location — works identically in window and
worker contexts, no baseURL argument needed.
- C tier Emscripten build flipped to EXPORT_ES6=1; loader uses dynamic
`import()` of the factory module. Integration test updated accordingly.
- Python loader uses `import("pyodide.mjs")` (ES module) instead of
document.createElement, which doesn't exist in workers.
Bug fixes
- Asm tier state leak: running the same demo twice on a cached WASM
instance produced corrupted output (every other cell on row 2+ rendered
as " " instead of the expected shade char). Root cause: top-level eval
passed `global_env` as the env, so closures captured stale globals;
fixed by passing NIL — env_lookup falls back to the CURRENT global_env
via its existing two-pass walk. Multi-run regression added to the
functional test suite.
- fib-ack demo: (ack 3 4) was too heavy for Pyodide (minutes). Cut to
(ack 3 3) + (fib 20) max so every tier finishes in seconds.
Test discipline
- Root `make test-all` now includes `wasm-test`. Adding a language
feature without exercising it on all six implementations is no longer
possible by accident.
- Functional suite: 11 assertions (was 10) — adds asm multi-run stability.
- Integration + unit: still 20 + 8.
84 lines
3.3 KiB
HTML
84 lines
3.3 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>lumbda playground — lisp in your browser, three tiers</title>
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<link rel="stylesheet" href="style.css">
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<script type="importmap">
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{
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"imports": {
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"@codemirror/state": "https://esm.sh/*@codemirror/state@6.4.1",
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"@codemirror/view": "https://esm.sh/*@codemirror/view@6.34.1",
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"@codemirror/commands": "https://esm.sh/*@codemirror/commands@6.6.2",
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"@codemirror/language": "https://esm.sh/*@codemirror/language@6.10.3",
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"@codemirror/legacy-modes/mode/scheme": "https://esm.sh/*@codemirror/legacy-modes@6.4.1/mode/scheme",
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"@codemirror/theme-one-dark": "https://esm.sh/*@codemirror/theme-one-dark@6.1.2",
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"@lezer/highlight": "https://esm.sh/*@lezer/highlight@1.2.1",
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"@lezer/common": "https://esm.sh/*@lezer/common@1.2.3",
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"style-mod": "https://esm.sh/*style-mod@4.1.2",
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"crelt": "https://esm.sh/*crelt@1.0.6",
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"w3c-keyname": "https://esm.sh/*w3c-keyname@2.2.8"
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}
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}
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</script>
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</head>
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<body>
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<header>
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<a class="brand" href="../" aria-label="lumbda home">
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<img class="logo" src="lumbda-logo-green.png" alt="" aria-hidden="true">
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<h1 aria-label="lumbda.">lumbda<span class="period" aria-hidden="true">.</span></h1>
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</a>
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<p class="tagline">lisp/scheme in your browser, three tiers in parallel</p>
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<p class="lede">
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same lisp source. three implementations compiled to webassembly:
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<strong>python</strong> (cpython via pyodide hosting <code>lumbda.py</code>),
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<strong>c</strong> (emscripten build of the tree-walker + bytecode vm),
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<strong>asm</strong> (hand-written webassembly text format — parallel to <code>asm/lumbda.s</code>).
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</p>
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</header>
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<section class="controls">
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<fieldset class="program">
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<legend>demo program</legend>
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<label><input type="radio" name="program" value="mandelbrot" checked> mandelbrot</label>
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<label><input type="radio" name="program" value="fib-ack"> fib + ackermann</label>
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<label><input type="radio" name="program" value="sieve"> sieve of eratosthenes</label>
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<label><input type="radio" name="program" value="self-interp"> lisp-in-lisp meta-eval</label>
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</fieldset>
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<fieldset class="tier">
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<legend>tier</legend>
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<label><input type="radio" name="tier" value="python"> python (pyodide)</label>
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<label><input type="radio" name="tier" value="c" checked> c (emcc)</label>
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<label><input type="radio" name="tier" value="asm"> asm (wat)</label>
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<label><input type="radio" name="tier" value="all"> all three</label>
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</fieldset>
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<button id="run" class="primary">run</button>
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<button id="cancel" class="secondary">cancel</button>
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<span id="status" class="status"></span>
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</section>
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<section class="panes">
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<div class="pane code-pane">
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<h2>code</h2>
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<div id="editor"></div>
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</div>
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<div class="pane output-pane">
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<h2>output</h2>
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<div id="output"></div>
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</div>
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</section>
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<footer>
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<p>
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<strong>asm tier note:</strong> the wat implementation ships a minimal lisp
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subset (special forms, arithmetic, list ops, recursion) — enough for the
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four demos above. symbol lookup is linear; would be moad-0001 at scale,
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documented in <code>asm/lumbda.wat</code>.
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see <a href="../">lumbda.</a>
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</p>
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</footer>
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<script type="module" src="app.js"></script>
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</body>
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</html>
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