ci: setup benchmark action

.github/workflows/bench.yaml

@@ -0,0 +1,76 @@
+name: Benchmark
+
+on:
+  pull_request:
+
+jobs:
+  bench:
+    name: Bench
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Setup node
+        uses: actions/setup-node@v1
+        with:
+          node-version: 14
+
+      - name: Install
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          profile: default
+          override: true
+
+      - name: Generate Cargo.lock
+        uses: actions-rs/cargo@v1
+        with:
+          command: generate-lockfile
+
+      - name: Cache cargo registry
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/registry
+          key: bench-cargo-registry-trimmed-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Cache cargo index
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/git
+          key: bench-cargo-index-trimmed-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Cache NPM dependencies
+        uses: actions/cache@v1
+        with:
+          path: node_modules
+          key: bench-${{ hashFiles('yarn.lock') }}
+          restore-keys: |
+            npm-cache-
+
+      - name: 'Install dependencies'
+        run: yarn install --frozen-lockfile --registry https://registry.npmjs.org
+
+      - name: 'Build ts'
+        run: yarn build
+
+      - name: 'Build bench'
+        run: yarn build:bench
+
+      - name: 'Run benchmark'
+        run: yarn bench
+
+      - name: Store benchmark result
+        uses: rhysd/github-action-benchmark@v1
+        with:
+          tool: 'benchmarkjs'
+          output-file-path: bench.txt
+          comment-on-alert: true
+          github-token: ${{ secrets.GH_TOKEN }}
+          auto-push: true
+          comment-always: true
+
+      - name: Clear the cargo caches
+        run: |
+          cargo install cargo-cache --no-default-features --features ci-autoclean
+          cargo-cache

.gitignore

@@ -156,4 +156,5 @@ Temporary Items
 # End of https://www.gitignore.io/api/macos
 scripts
 
-sys/.node-headers
+sys/.node-headers
+bench.txt

bench/bench.ts

@@ -1,11 +1,27 @@
+import { promises as fs } from 'fs'
+import { join } from 'path'
+
+import { Summary } from 'benny/lib/internal/common-types'
+
 import { benchAsync } from './async'
 import { benchNoop } from './noop'
 import { benchPlus } from './plus'
 
 async function run() {
-  await benchNoop()
-  await benchPlus()
-  await benchAsync()
+  const output = [await benchNoop(), await benchPlus(), await benchAsync()]
+    .map(formatSummary)
+    .join('\n')
+
+  await fs.writeFile(join(process.cwd(), 'bench.txt'), output, 'utf8')
+}
+
+function formatSummary(summary: Summary): string {
+  return summary.results
+    .map(
+      (result) =>
+        `${summary.name}#${result.name} x ${result.ops} ops/sec ±${result.margin}% (${result.samples} runs sampled)`,
+    )
+    .join('\n')
 }
 
 run().catch((e) => {