Benchmark crate for core features

.github/workflows/benchmark-core.yml

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+---
+name: Benchmark - core
+
+on:
+  pull_request:
+    branches: [master]
+    paths:
+      - .github/workflows/benchmark-core.yml
+      - "packages/yew/**"
+      - "tools/benchmark-core/**"
+
+jobs:
+  benchmark-core:
+    name: Benchmark - core
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout master
+        uses: actions/checkout@v3
+        with:
+          repository: "yewstack/yew"
+          ref: master
+          path: yew-master
+
+      - name: Checkout pull request
+        uses: actions/checkout@v3
+        with:
+          path: current-pr
+
+      - name: Setup toolchain
+        uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: stable
+
+      - name: Restore Rust cache for master
+        uses: Swatinem/rust-cache@v2
+        with:
+          working-directory: yew-master
+          key: master
+
+      - name: Restore Rust cache for current pull request
+        uses: Swatinem/rust-cache@v2
+        with:
+          working-directory: current-pr
+          key: pr
+
+      - name: Run pull request benchmark
+        run: cargo bench -q > ../output.log
+        working-directory: current-pr/tools/benchmark-core
+
+      - name: Run master benchmark
+        run: cargo bench -q > ../output.log
+        continue-on-error: true
+        working-directory: yew-master/tools/benchmark-core
+
+      - name: Make sure master's output log exists
+        run: touch yew-master/tools/output.log
+
+      - name: Write Pull Request ID
+        run: |
+          echo "${{ github.event.number }}" > .PR_NUMBER
+
+      - name: Upload Artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: benchmark-core
+          path: |
+            .PR_NUMBER
+            yew-master/tools/output.log
+            current-pr/tools/output.log
+          retention-days: 1

.github/workflows/post-benchmark-core.yml

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+---
+name: Post Comment for Benchmark - core
+
+on:
+  workflow_run:
+    workflows: ["Benchmark - core"]
+    types:
+      - completed
+
+jobs:
+  post-benchmark-core:
+    if: github.event.workflow_run.event == 'pull_request'
+    name: Post Comment on Pull Request
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Download Repository
+        uses: actions/checkout@v3
+
+      - name: Download Artifact
+        uses: Legit-Labs/action-download-artifact@v2
+        with:
+          github_token: "${{ secrets.GITHUB_TOKEN }}"
+          workflow: benchmark-core.yml
+          run_id: ${{ github.event.workflow_run.id }}
+          name: benchmark-core
+          path: "benchmark-core/"
+
+      - name: Make pull request comment
+        run: |
+          cat - >>comment.txt <<EOF
+          ### Benchmark - core
+          #### Yew Master
+          \`\`\`
+          EOF
+          cat benchmark-core/yew-master/tools/output.json >>comment.txt
+          cat - >>comment.txt <<EOF
+          \`\`\`
+          #### Pull Request" >> comment.txt
+          \`\`\`
+          EOF
+          cat benchmark-core/current-pr/tools/output.json >>comment.txt
+          cat - >>comment.txt <<EOF
+          \`\`\`
+          EOF
+
+      - name: Read Pull Request ID
+        run: |
+          PR_NUMBER=$(cat "benchmark-core/.PR_NUMBER")
+          if ! [[ "$PR_NUMBER" =~ ^[0-9]+$ ]]; then
+            echo "pr number invalid"
+            exit 1
+          fi
+          echo "PR_NUMBER=$PR_NUMBER" >> $GITHUB_ENV
+
+      - name: Post Comment
+        uses: actions/github-script@v6
+        with:
+          script: |
+            const fs = require('fs');
+
+            const commentInfo = {
+              ...context.repo,
+              issue_number: ${{ env.PR_NUMBER }},
+            };
+
+            const comment = {
+              ...commentInfo,
+              body: fs.readFileSync("comment.txt", 'utf-8'),
+            };
+
+            function isCommentByBot(comment) {
+              return comment.user.type === "Bot" && comment.body.includes("### Benchmark - core");
+            }
+
+            let commentId = null;
+            const comments = (await github.rest.issues.listComments(commentInfo)).data;
+            for (let i = comments.length; i--; ) {
+              const c = comments[i];
+              if (isCommentByBot(c)) {
+                commentId = c.id;
+                break;
+              }
+            }
+
+            if (commentId) {
+              try {
+                await github.rest.issues.updateComment({
+                  ...context.repo,
+                  comment_id: commentId,
+                  body: comment.body,
+                });
+              } catch (e) {
+                commentId = null;
+              }
+            }
+
+            if (!commentId) {
+              await github.rest.issues.createComment(comment);
+            }

tools/benchmark-core/Cargo.toml

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+[package]
+name = "benchmark-core"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[[bench]]
+name = "vnode"
+harness = false
+
+[dependencies]
+divan = "0.1.0"
+yew = { path = "../../packages/yew" }