The publish bundler artifact, worker-bundler source and esbuild wasm, is fetched from static assets at first use instead of being inlined into the worker script, returning the script to its previous size. Cold-start latency regressed while the 19MB artifact chunk was part of the script blob.
Showing the changes to apps/cloud/scripts (2 of 8 files). Show all
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| @@ -0,0 +1,54 @@ | |||
| 1 | import { readdirSync, readFileSync, statSync } from "node:fs"; | ||
| 2 | import { join } from "node:path"; | ||
| 3 | |||
| 4 | const appRoot = new URL("..", import.meta.url); | ||
| 5 | const serverAssetsDir = new URL("dist/server/assets/", appRoot); | ||
| 6 | const clientAssetsDir = new URL("dist/client/assets/", appRoot); | ||
| 7 | const largeFileLimit = 3 * 1024 * 1024; | ||
| 8 | const sourceAssetMinimum = 512 * 1024; | ||
| 9 | |||
| 10 | const fail = (message) => { | ||
| 11 | // oxlint-disable-next-line executor/no-try-catch-or-throw, executor/no-error-constructor -- boundary: build assertion script reports a failed artifact contract | ||
| 12 | throw new Error(message); | ||
| 13 | }; | ||
| 14 | |||
| 15 | const fileSize = (dir, name) => statSync(join(dir.pathname, name)).size; | ||
| 16 | |||
| 17 | const serverAssets = readdirSync(serverAssetsDir); | ||
| 18 | for (const name of serverAssets) { | ||
| 19 | const path = join(serverAssetsDir.pathname, name); | ||
| 20 | const size = statSync(path).size; | ||
| 21 | if (size <= largeFileLimit) continue; | ||
| 22 | if (name.includes("worker-bundler")) { | ||
| 23 | fail(`server assets include oversized worker-bundler chunk ${name}`); | ||
| 24 | } | ||
| 25 | const sample = readFileSync(path, "utf8"); | ||
| 26 | if (sample.includes("worker-bundler")) { | ||
| 27 | fail(`server assets include worker-bundler content in oversized chunk ${name}`); | ||
| 28 | } | ||
| 29 | } | ||
| 30 | |||
| 31 | const clientAssets = readdirSync(clientAssetsDir); | ||
| 32 | const source = clientAssets.find((name) => /^worker-bundler-source-[a-f0-9]{12}\.js$/.test(name)); | ||
| 33 | const wasm = clientAssets.find((name) => | ||
| 34 | /^worker-bundler-esbuild-wasm-[a-f0-9]{12}\.wasm$/.test(name), | ||
| 35 | ); | ||
| 36 | |||
| 37 | if (source === undefined) fail("missing worker-bundler source asset"); | ||
| 38 | if (wasm === undefined) fail("missing worker-bundler esbuild wasm asset"); | ||
| 39 | |||
| 40 | const sourceSize = fileSize(clientAssetsDir, source); | ||
| 41 | const wasmSize = fileSize(clientAssetsDir, wasm); | ||
| 42 | if (sourceSize <= sourceAssetMinimum) { | ||
| 43 | fail(`worker-bundler source asset is unexpectedly small: ${source}`); | ||
| 44 | } | ||
| 45 | if (wasmSize <= largeFileLimit) fail(`worker-bundler wasm asset is unexpectedly small: ${wasm}`); | ||
| 46 | |||
| 47 | const wasmMagic = readFileSync(join(clientAssetsDir.pathname, wasm)).subarray(0, 4); | ||
| 48 | if (!wasmMagic.equals(Buffer.from([0x00, 0x61, 0x73, 0x6d]))) { | ||
| 49 | fail(`worker-bundler wasm asset does not start with wasm magic bytes: ${wasm}`); | ||
| 50 | } | ||
| 51 | |||
| 52 | console.log( | ||
| 53 | `[assert-worker-bundler-assets] ${source} (${sourceSize} bytes), ${wasm} (${wasmSize} bytes)`, | ||
| 54 | ); | ||
| @@ -24,6 +24,7 @@ const steps = [ · 23 unmodified lines | |||
| 24 | // imports, so they must be built before vite starts. | 24 | // imports, so they must be built before vite starts. |
| 25 | "turbo run build --filter @executor-js/vite-plugin --filter @executor-js/react --filter @executor-js/plugin-apps", | 25 | "turbo run build --filter @executor-js/vite-plugin --filter @executor-js/react --filter @executor-js/plugin-apps", |
| 26 | "vite build", | 26 | "vite build", |
| 27 | "node scripts/assert-worker-bundler-assets.mjs", | ||
| 27 | ]; | 28 | ]; |
| 28 | 29 | ||
| 29 | for (const step of steps) { | 30 | for (const step of steps) { |