multi-core builds

quartz/processors/parse.ts

@@ -1,3 +1,4 @@
+import esbuild from 'esbuild'
 import remarkParse from 'remark-parse'
 import remarkRehype from 'remark-rehype'
 import { Processor, unified } from "unified"
@@ -8,6 +9,8 @@ import { PerfTimer } from '../perf'
 import { read } from 'to-vfile'
 import { slugify } from '../path'
 import path from 'path'
+import os from 'os'
+import workerpool, { Promise as WorkerPromise } from 'workerpool'
 import { QuartzTransformerPlugin } from '../plugins/types'
 
 export type QuartzProcessor = Processor<MDRoot, HTMLRoot, void>
@@ -32,24 +35,89 @@ export function createProcessor(transformers: QuartzTransformerPlugin[]): any {
   return processor
 }
 
-export async function parseMarkdown(processor: QuartzProcessor, baseDir: string, fps: string[], verbose: boolean): Promise<ProcessedContent[]> {
-  const perf = new PerfTimer()
-  const res: ProcessedContent[] = []
-  for (const fp of fps) {
-    const file = await read(fp)
+function* chunks<T>(arr: T[], n: number) {
+  for (let i = 0; i < arr.length; i += n) {
+    yield arr.slice(i, i + n)
+  }
+}
 
-    // base data properties that plugins may use
-    file.data.slug = slugify(path.relative(baseDir, file.path))
-    file.data.filePath = fp
-
-    const ast = processor.parse(file)
-    res.push([await processor.run(ast, file), file])
-
-    if (verbose) {
-      console.log(`[process] ${fp} -> ${file.data.slug}`)
-    }
+async function transpileWorkerScript(verbose: boolean) {
+  // transpile worker script
+  const cacheFile = "./.quartz-cache/transpiled-worker.mjs"
+  const fp = "./quartz/worker.ts"
+  if (verbose) {
+    console.log("Transpiling worker script")
   }
 
-  console.log(`Parsed and transformed ${res.length} Markdown files in ${perf.timeSince()}`)
+  await esbuild.build({
+    entryPoints: [fp],
+    outfile: path.join("quartz", cacheFile),
+    bundle: true,
+    keepNames: true,
+    platform: "node",
+    format: "esm",
+    packages: "external",
+    plugins: [
+      {
+        name: 'css-and-scripts-as-text',
+        setup(build) {
+          build.onLoad({ filter: /\.scss$/ }, (_) => ({
+            contents: '',
+            loader: 'text'
+          }))
+          build.onLoad({ filter: /\.inline\.(ts|js)$/ }, (_) => ({
+            contents: '',
+            loader: 'text'
+          }))
+        }
+      }
+    ]
+  })
+}
+
+export async function parseMarkdown(transformers: QuartzTransformerPlugin[], baseDir: string, fps: string[], verbose: boolean): Promise<ProcessedContent[]> {
+  const perf = new PerfTimer()
+
+  const CHUNK_SIZE = 128
+  let concurrency = fps.length < CHUNK_SIZE ? 1 : os.availableParallelism()
+  const res: ProcessedContent[] = []
+  if (concurrency === 1) {
+    // single-thread
+    const processor = createProcessor(transformers)
+    for (const fp of fps) {
+      const file = await read(fp)
+
+      // base data properties that plugins may use
+      file.data.slug = slugify(path.relative(baseDir, file.path))
+      file.data.filePath = fp
+
+      const ast = processor.parse(file)
+      res.push([await processor.run(ast, file), file])
+
+      if (verbose) {
+        console.log(`[process] ${fp} -> ${file.data.slug}`)
+      }
+    }
+  } else {
+    await transpileWorkerScript(verbose)
+    const pool = workerpool.pool(
+      './quartz/bootstrap-worker.mjs',
+      {
+        minWorkers: 'max',
+        maxWorkers: concurrency,
+        workerType: 'thread'
+      }
+    )
+
+    const childPromises: WorkerPromise<ProcessedContent[]>[] = []
+    for (const chunk of chunks(fps, CHUNK_SIZE)) {
+      childPromises.push(pool.exec('parseFiles', [baseDir, chunk, verbose]))
+    }
+    const results: ProcessedContent[][] = await WorkerPromise.all(childPromises)
+    res.push(...results.flat())
+    await pool.terminate()
+  }
+
+  console.log(`Parsed and transformed ${res.length} Markdown files with ${concurrency} cores in ${perf.timeSince()}`)
   return res
 }