minsungandClaude Opus 5
b047dc44e2
Mirrors hmwebviewer's rust/dwg-wasm change into the sample: the wasm artifact plus the parser wrapper, which now goes through parse_dwg_json and JSON.parse instead of the JsValue-returning parse_dwg. Building the whole result as a serde_json::Value tree pushed the live wasm heap near 2.9GB for a 19MB drawing, and the allocator's cost grows with that heap, so parsing went quadratic — 354s, with the tab frozen throughout. Streaming one entity at a time keeps it linear: 2.5s. The same build also fixes three bugs that drew stray 4km grey shapes where two CF-PATT SOLID hatches should be. Max hatch span 4655 -> 110. Adds two docs recording both investigations, in the format of the existing ones: measurements, the hypotheses that were ruled out, the fixes, regression checks, and the MPL-2.0 position (acadrust is unmodified, so no new source-disclosure obligation arises). Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
29 lines
1.1 KiB
TypeScript
29 lines
1.1 KiB
TypeScript
/**
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* acadrust DWG parser wrapper — loads the wasm built from rust/dwg-wasm
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* (wasm-pack --target web, committed under ./acadrust-dwg).
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*/
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import init, { parse_dwg_json } from './acadrust-dwg/acadrust_dwg.js';
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import wasmUrl from './acadrust-dwg/acadrust_dwg_bg.wasm?url';
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import type { CadParseResult } from './dwgParser';
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let ready: Promise<void> | null = null;
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/** Initialize the acadrust WASM module once (idempotent). */
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export function initAcadrustParser(): Promise<void> {
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if (!ready) ready = init({ module_or_path: wasmUrl }).then(() => undefined);
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return ready;
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}
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/**
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* Parse a DWG buffer. Requires initAcadrustParser() first.
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*
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* Goes through `parse_dwg_json` + `JSON.parse` rather than the `parse_dwg`
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* export that hands back a JsValue. The latter keeps the entire result live on
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* the wasm heap as it builds, and the allocator's cost grows with that heap —
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* a 19 MB drawing took ~354 s and froze the tab. Streaming the result out as
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* text keeps it linear: the same file now lands in ~2.5 s.
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*/
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export function parseDwgAcadrust(bytes: Uint8Array): CadParseResult {
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return JSON.parse(parse_dwg_json(bytes)) as CadParseResult;
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}
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