feat: adds progress events to the importer and exporter (#302)

Adds progress events for dag creation and export

Author: achingbrain

benchmarks/import/README.md

@@ -0,0 +1,27 @@
+# Import Benchmark
+
+How much memory does the importer use while importing files?
+
+It should be relatively flat to enable importing files larger than physical memory.
+
+## Usage
+
+```console
+$ npm i
+$ npm start
+
+> benchmarks-gc@1.0.0 start
+> npm run build && node dist/src/index.js
+
+
+> benchmarks-gc@1.0.0 build
+> aegir build --bundle false
+
+[14:51:28] tsc [started]
+[14:51:33] tsc [completed]
+generating Ed25519 keypair...
+┌─────────┬────────────────┬─────────┬───────────┬──────┐
+│ (index) │ Implementation │  ops/s  │   ms/op   │ runs │
+├─────────┼────────────────┼─────────┼───────────┼──────┤
+//... results here
+```

benchmarks/import/package.json

@@ -0,0 +1,42 @@
+{
+  "name": "ipfs-unixfs-memory-benchmark",
+  "version": "0.0.0",
+  "description": "Memory benchmarks for ipfs-unixfs-importer",
+  "license": "Apache-2.0 OR MIT",
+  "private": true,
+  "type": "module",
+  "types": "./dist/src/index.d.ts",
+  "files": [
+    "src",
+    "dist",
+    "!dist/test",
+    "!**/*.tsbuildinfo"
+  ],
+  "exports": {
+    ".": {
+      "types": "./dist/src/index.d.ts",
+      "import": "./dist/src/index.js"
+    }
+  },
+  "eslintConfig": {
+    "extends": "ipfs",
+    "parserOptions": {
+      "sourceType": "module"
+    }
+  },
+  "scripts": {
+    "build": "aegir build --bundle false",
+    "clean": "aegir clean",
+    "lint": "aegir lint",
+    "dep-check": "aegir dep-check",
+    "start": "npm run build && node --expose-gc ./dist/test/index.spec.js"
+  },
+  "devDependencies": {
+    "aegir": "^38.1.2",
+    "blockstore-core": "^4.0.1",
+    "blockstore-fs": "^1.0.0",
+    "ipfs-unixfs-importer": "../../packages/ipfs-unixfs-importer",
+    "it-buffer-stream": "^3.0.1",
+    "it-drain": "^2.0.1"
+  }
+}

benchmarks/import/src/index.ts

@@ -0,0 +1 @@
+export {}

benchmarks/import/test/index.spec.ts

@@ -0,0 +1,61 @@
+/* eslint-env mocha */
+
+import { importer, ImporterOptions } from 'ipfs-unixfs-importer'
+import bufferStream from 'it-buffer-stream'
+import { MemoryBlockstore } from 'blockstore-core'
+import drain from 'it-drain'
+
+const REPEATS = 10
+const FILE_SIZE = Math.pow(2, 20) * 500 // 500MB
+const CHUNK_SIZE = 65536
+
+async function main (): Promise<void> {
+  const block = new MemoryBlockstore()
+  const times: number[] = []
+
+  for (let i = 0; i < REPEATS; i++) {
+    const size = FILE_SIZE
+    let read = 0
+    let lastDate = Date.now()
+    let lastPercent = 0
+
+    const options: Partial<ImporterOptions> = {
+      onProgress: (evt) => {
+        if (evt.type === 'unixfs:importer:progress:file:read') {
+          read += Number(evt.detail.bytesRead)
+
+          const percent = Math.round((read / size) * 100)
+
+          if (percent > lastPercent) {
+            times[percent] = (times[percent] ?? 0) + (Date.now() - lastDate)
+
+            lastDate = Date.now()
+            lastPercent = percent
+          }
+        }
+      }
+    }
+
+    const buf = new Uint8Array(CHUNK_SIZE).fill(0)
+
+    await drain(importer([{
+      path: '200Bytes.txt',
+      content: bufferStream(size, {
+        chunkSize: CHUNK_SIZE,
+        generator: () => {
+          return buf
+        }
+      })
+    }], block, options))
+  }
+
+  console.info('Percent\tms') // eslint-disable-line no-console
+  times.forEach((time, index) => {
+    console.info(`${index}\t${Math.round(time / REPEATS)}`) // eslint-disable-line no-console
+  })
+}
+
+main().catch(err => {
+  console.error(err) // eslint-disable-line no-console
+  process.exit(1)
+})

benchmarks/import/tsconfig.json

@@ -0,0 +1,10 @@
+{
+  "extends": "aegir/src/config/tsconfig.aegir.json",
+  "compilerOptions": {
+    "outDir": "dist"
+  },
+  "include": [
+    "src",
+    "test"
+  ]
+}

packages/ipfs-unixfs-exporter/src/index.ts

@@ -6,9 +6,47 @@ import type { UnixFS } from 'ipfs-unixfs'
 import type { PBNode } from '@ipld/dag-pb'
 import type { Blockstore } from 'interface-blockstore'
 import type { Bucket } from 'hamt-sharding'
-import type { ProgressOptions } from 'progress-events'
+import type { ProgressOptions, ProgressEvent } from 'progress-events'
+
+export interface ExportProgress {
+  /**
+   * How many bytes of the file have been read
+   */
+  bytesRead: bigint
+
+  /**
+   * How many bytes of the file will be read - n.b. this may be
+   * smaller than `fileSize` if `offset`/`length` have been
+   * specified
+   */
+  totalBytes: bigint
+
+  /**
+   * The size of the file being read - n.b. this may be
+   * larger than `total` if `offset`/`length` has been
+   * specified
+   */
+  fileSize: bigint
+}
+
+export interface ExportWalk {
+  cid: CID
+}
 
-export interface ExporterOptions extends ProgressOptions {
+/**
+ * Progress events emitted by the exporter
+ */
+export type ExporterProgressEvents =
+  ProgressEvent<'unixfs:exporter:progress:unixfs:file', ExportProgress> |
+  ProgressEvent<'unixfs:exporter:progress:unixfs:raw', ExportProgress> |
+  ProgressEvent<'unixfs:exporter:progress:raw', ExportProgress> |
+  ProgressEvent<'unixfs:exporter:progress:identity', ExportProgress> |
+  ProgressEvent<'unixfs:exporter:walk:file', ExportWalk> |
+  ProgressEvent<'unixfs:exporter:walk:directory', ExportWalk> |
+  ProgressEvent<'unixfs:exporter:walk:hamt-sharded-directory', ExportWalk> |
+  ProgressEvent<'unixfs:exporter:walk:raw', ExportWalk>
+
+export interface ExporterOptions extends ProgressOptions<ExporterProgressEvents> {
   offset?: number
   length?: number
   signal?: AbortSignal

packages/ipfs-unixfs-exporter/src/resolvers/identity.ts

@@ -2,7 +2,8 @@ import errCode from 'err-code'
 import extractDataFromBlock from '../utils/extract-data-from-block.js'
 import validateOffsetAndLength from '../utils/validate-offset-and-length.js'
 import * as mh from 'multiformats/hashes/digest'
-import type { ExporterOptions, Resolver } from '../index.js'
+import type { ExporterOptions, Resolver, ExportProgress } from '../index.js'
+import { CustomProgressEvent } from 'progress-events'
 
 const rawContent = (node: Uint8Array): ((options?: ExporterOptions) => AsyncGenerator<Uint8Array, void, undefined>) => {
   async function * contentGenerator (options: ExporterOptions = {}): AsyncGenerator<Uint8Array, void, undefined> {
@@ -11,7 +12,15 @@ const rawContent = (node: Uint8Array): ((options?: ExporterOptions) => AsyncGene
       length
     } = validateOffsetAndLength(node.length, options.offset, options.length)
 
-    yield extractDataFromBlock(node, 0n, offset, offset + length)
+    const buf = extractDataFromBlock(node, 0n, offset, offset + length)
+
+    options.onProgress?.(new CustomProgressEvent<ExportProgress>('unixfs:exporter:progress:identity', {
+      bytesRead: BigInt(buf.byteLength),
+      totalBytes: length - offset,
+      fileSize: BigInt(node.byteLength)
+    }))
+
+    yield buf
   }
 
   return contentGenerator

packages/ipfs-unixfs-exporter/src/resolvers/raw.ts

@@ -1,7 +1,8 @@
 import errCode from 'err-code'
-import type { ExporterOptions, Resolver } from '../index.js'
+import type { ExporterOptions, Resolver, ExportProgress } from '../index.js'
 import extractDataFromBlock from '../utils/extract-data-from-block.js'
 import validateOffsetAndLength from '../utils/validate-offset-and-length.js'
+import { CustomProgressEvent } from 'progress-events'
 
 const rawContent = (node: Uint8Array): ((options?: ExporterOptions) => AsyncGenerator<Uint8Array, void, undefined>) => {
   async function * contentGenerator (options: ExporterOptions = {}): AsyncGenerator<Uint8Array, void, undefined> {
@@ -10,7 +11,15 @@ const rawContent = (node: Uint8Array): ((options?: ExporterOptions) => AsyncGene
       length
     } = validateOffsetAndLength(node.length, options.offset, options.length)
 
-    yield extractDataFromBlock(node, 0n, offset, offset + length)
+    const buf = extractDataFromBlock(node, 0n, offset, offset + length)
+
+    options.onProgress?.(new CustomProgressEvent<ExportProgress>('unixfs:exporter:progress:raw', {
+      bytesRead: BigInt(buf.byteLength),
+      totalBytes: length - offset,
+      fileSize: BigInt(node.byteLength)
+    }))
+
+    yield buf
   }
 
   return contentGenerator

packages/ipfs-unixfs-exporter/src/resolvers/unixfs-v1/content/directory.ts

@@ -2,14 +2,19 @@ import parallel from 'it-parallel'
 import { pipe } from 'it-pipe'
 import map from 'it-map'
 import filter from 'it-filter'
-import type { ExporterOptions, UnixfsV1DirectoryContent, UnixfsV1Resolver } from '../../../index.js'
+import type { ExporterOptions, ExportWalk, UnixfsV1DirectoryContent, UnixfsV1Resolver } from '../../../index.js'
+import { CustomProgressEvent } from 'progress-events'
 
 const directoryContent: UnixfsV1Resolver = (cid, node, unixfs, path, resolve, depth, blockstore) => {
   async function * yieldDirectoryContent (options: ExporterOptions = {}): UnixfsV1DirectoryContent {
     const offset = options.offset ?? 0
     const length = options.length ?? node.Links.length
     const links = node.Links.slice(offset, length)
 
+    options.onProgress?.(new CustomProgressEvent<ExportWalk>('unixfs:exporter:walk:directory', {
+      cid
+    }))
+
     yield * pipe(
       links,
       source => map(source, link => {

packages/ipfs-unixfs-exporter/src/resolvers/unixfs-v1/content/file.ts

@@ -9,7 +9,8 @@ import parallel from 'it-parallel'
 import { pipe } from 'it-pipe'
 import map from 'it-map'
 import PQueue from 'p-queue'
-import type { ExporterOptions, UnixfsV1FileContent, UnixfsV1Resolver, ReadableStorage } from '../../../index.js'
+import type { ExporterOptions, UnixfsV1FileContent, UnixfsV1Resolver, ReadableStorage, ExportProgress, ExportWalk } from '../../../index.js'
+import { CustomProgressEvent } from 'progress-events'
 
 async function walkDAG (blockstore: ReadableStorage, node: dagPb.PBNode | Uint8Array, queue: Pushable<Uint8Array>, streamPosition: bigint, start: bigint, end: bigint, options: ExporterOptions): Promise<void> {
   // a `raw` node
@@ -110,6 +111,10 @@ async function walkDAG (blockstore: ReadableStorage, node: dagPb.PBNode | Uint8A
 
         // if the job rejects the 'error' event will be emitted on the child queue
         void childQueue.add(async () => {
+          options.onProgress?.(new CustomProgressEvent<ExportWalk>('unixfs:exporter:walk:file', {
+            cid: link.Hash
+          }))
+
           await walkDAG(blockstore, child, queue, blockStart, start, end, options)
         })
 
@@ -138,12 +143,15 @@ const fileContent: UnixfsV1Resolver = (cid, node, unixfs, path, resolve, depth,
     }
 
     let read = 0n
+    const wanted = length - offset
     const queue = pushable()
 
+    options.onProgress?.(new CustomProgressEvent<ExportWalk>('unixfs:exporter:walk:file', {
+      cid
+    }))
+
     void walkDAG(blockstore, node, queue, 0n, offset, offset + length, options)
       .then(() => {
-        const wanted = length - offset
-
         if (read < wanted) {
           throw errCode(new Error('Traversed entire DAG but did not read enough bytes'), 'ERR_UNDER_READ')
         }
@@ -169,6 +177,12 @@ const fileContent: UnixfsV1Resolver = (cid, node, unixfs, path, resolve, depth,
         queue.end()
       }
 
+      options.onProgress?.(new CustomProgressEvent<ExportProgress>('unixfs:exporter:progress:unixfs:file', {
+        bytesRead: read,
+        totalBytes: wanted,
+        fileSize
+      }))
+
       yield buf
     }
   }