feat(track): performance improvements (#988)

- Adds playwright
- Add playwright test which measures how long it takes to zoom in an example spec (from
- Improve performance of json-type by removing deep-clones of spec/data #823 (comment))
- Persist resolved spec as a property of GoslingTrackClass so that it doesn't have to be regenerated every time
- Minimize number of deep clones of the spec or the data.

.github/workflows/playwright.yml

@@ -0,0 +1,27 @@
+name: Playwright Tests
+on:
+  push:
+    branches: [ main, master ]
+  pull_request:
+    branches: [ main, master ]
+jobs:
+  test:
+    timeout-minutes: 60
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: actions/setup-node@v3
+      with:
+        node-version: 18
+    - name: Install dependencies
+      run: yarn
+    - name: Install Playwright Browsers
+      run: yarn playwright install --with-deps chromium
+    - name: Run Playwright tests
+      run: yarn playwright test
+    - uses: actions/upload-artifact@v3
+      if: always()
+      with:
+        name: playwright-report
+        path: playwright-report/
+        retention-days: 30

.github/workflows/test.yml

@@ -0,0 +1,15 @@
+name: Playwright Tests 2
+on:
+    issue_comment:
+        types: [created]
+jobs:
+    test:
+        timeout-minutes: 60
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v3
+            - uses: actions/setup-node@v3
+              with:
+                  node-version: 18
+            - name: Install dependencies
+              run: yarn

.gitignore

@@ -21,3 +21,6 @@ report.*
 *.swp
 *.swo
 *~
+/test-results/
+/playwright-report/
+/playwright/.cache/