perf: use lzma-wasm for SWF decompression and drop vite
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Replace the pure-JS lzma decoder with lzma-wasm (Rust/WASM, base64-inlined,
zero-alloc decompress), giving an order-of-magnitude speedup on furni
imports. Remove the obsolete lzma type shim and the redundant top-level
vite dev dependency, which nothing imports directly.
This commit is contained in:
openhands committed 2026-08-29 19:27:27 +02:00
1 parent 7a41775c7e
commit ca59a1065f
6 files changed
+19 -31

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+5 -2
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@@ -1,5 +1,5 @@
import { deflateSync } from "node:zlib";
import LZMA from "lzma";
import { initWasmSync, compress as lzmaCompress } from "lzma-wasm";
import { describe, expect, it } from "vitest";
import {
decompressSwf,
@@ -33,7 +33,10 @@ function cwsFixture(payload: Buffer, version = 6): Buffer {
}
function zwsFixture(payload: Buffer, version = 6): Buffer {
const rawLzma = LZMA.compress(payload, 9);
initWasmSync();
const rawLzma = Buffer.from(
lzmaCompress(payload, { format: "lzma", level: 9 }),
);
const props = Buffer.from(rawLzma.slice(0, 5));
const compressedPayload = Buffer.from(rawLzma.slice(13));
const compressedSize = 5 + compressedPayload.length;
+5 -2
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@@ -3,8 +3,9 @@
*/
import { inflateSync } from "node:zlib";
import { initWasmSync, decompress as lzmaDecompress } from "lzma-wasm";
const LZMA = require("lzma/src/lzma_worker").LZMA_WORKER;
initWasmSync();
// ── SWF Tag Types ──────────────────────────────────────────────────
export const TAG_END = 0;
@@ -62,7 +63,9 @@ export function decompressSwf(buffer: Buffer): Buffer {
lzmaHeader.writeUInt32LE(0, 9);
const lzmaStream = Buffer.concat([lzmaHeader, compressedPayload]);
const decompressed = Buffer.from(LZMA.decompress(lzmaStream) as number[]);
const decompressed = Buffer.from(
lzmaDecompress(lzmaStream, { expectedSize: uncompressedSize }),
);
const header = Buffer.alloc(8);
buffer.copy(header, 0, 0, 8);
-14
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@@ -1,14 +0,0 @@
declare module "lzma" {
export const LZMA: any;
export function decompress(
byte_array: any,
on_finish?: (result: any, error: any) => void,
on_progress?: (percent: number) => void,
): any;
export function compress(
string: string | Uint8Array,
mode: number,
on_finish?: (result: any, error: any) => void,
on_progress?: (percent: number) => void,
): any;
}