test: jest performance improvements + add profiling scripts

Author: ahochsteger

package.json

@@ -12,7 +12,7 @@
     "ci": "npm run ci:build && npm run ci:test && npm run ci:docs",
     "ci:build": "npm run clean && npm ci && npm run build && npm run lint:code",
     "ci:docs": "npm run clean:docs && npm ci && ( cd docs && npm ci ) && npm run build:docs",
-    "ci:test": "TZ=Etc/UTC jest -i --ci --coverage",
+    "ci:test": "TZ=Etc/UTC jest --runInBand -i --ci --coverage",
     "clean": "rm -rf build docs/build",
     "clean:docs": "rm -rf docs/build",
     "clean:examples": "scripts/clasp.sh examples clean",
@@ -65,8 +65,11 @@
     "secrets:sync": "scripts/github-secrets.sh sync all",
     "sonar:local": "npx sonar-scanner -Dsonar.branch.name=local -Dsonar.branch.target=main -Dsonar.projectVersion=''",
     "start:docs": "npm run build:docs && cd docs && npm start",
-    "test": "TZ=Etc/UTC npx jest --reporters=summary --silent",
-    "test:examples": "TZ=Etc/UTC npx jest --reporters=summary --silent --testPathPattern src/examples",
+    "test": "TZ=Etc/UTC npx jest --runInBand --reporters=summary --silent",
+    "test:profile-devtools": "node --inspect-brk ./node_modules/.bin/jest --runInBand",
+    "test:profile-jest": "npx jest --runInBand --json --outputFile=test-results.json",
+    "test:profile-nodejs": "node --prof ./node_modules/.bin/jest --runInBand && node --prof-process isolate-*.log > profile.txt",
+    "test:examples": "TZ=Etc/UTC npx jest --runInBand --reporters=summary --silent --testPathPattern src/examples",
     "test:verbose": "TZ=Etc/UTC npx jest --detectOpenHandles --reporters='default' --runInBand --verbose",
     "update": "npm run update:examples && npm run update:parser && npm run update:schema && npm run update:docs && npm run update:contributors",
     "update:contributors": "npx all-contributors generate",