add a simple benchmark setup

benchmark/benchmark.js

@@ -0,0 +1,15 @@
+'use strict';
+
+const Benchmark = require('benchmark');
+
+Benchmark.options.maxTime = 0;
+Benchmark.options.minSamples = 10;
+
+module.exports = () => {
+  const suite = new Benchmark.Suite();
+
+  return suite
+    .on('cycle', event => {
+      console.log(String(event.target));
+    });
+};

benchmark/create-spans.js

@@ -0,0 +1,30 @@
+const benchmark = require('./benchmark');
+const { BasicTracerProvider } = require('../packages/opentelemetry-sdk-trace-base/build/src');
+
+var suite = benchmark()
+
+const tracerProvider = new BasicTracerProvider();
+const tracer = tracerProvider.getTracer('test')
+
+suite
+.add('1 span, 1 attribute, 1 event', function() {
+  const span = tracer.startSpan('span');
+  span.setAttribute('number', 1234)
+  span.addEvent('event1')
+  span.end()
+})
+.add('10 attributes', function() {
+  const span = tracer.startSpan('span');
+  span.setAttribute('aaaaaaaaaaaaaaaaaaaa', 'aaaaaaaaaaaaaaaaaaaa');
+  span.setAttribute('bbbbbbbbbbbbbbbbbbbb', 'aaaaaaaaaaaaaaaaaaaa');
+  span.setAttribute('cccccccccccccccccccc', 'aaaaaaaaaaaaaaaaaaaa');
+  span.setAttribute('dddddddddddddddddddd', 'aaaaaaaaaaaaaaaaaaaa');
+  span.setAttribute('eeeeeeeeeeeeeeeeeeee', 'aaaaaaaaaaaaaaaaaaaa');
+  span.setAttribute('ffffffffffffffffffff', 'aaaaaaaaaaaaaaaaaaaa');
+  span.setAttribute('gggggggggggggggggggg', 'aaaaaaaaaaaaaaaaaaaa');
+  span.setAttribute('hhhhhhhhhhhhhhhhhhhh', 'aaaaaaaaaaaaaaaaaaaa');
+  span.setAttribute('iiiiiiiiiiiiiiiiiiii', 'aaaaaaaaaaaaaaaaaaaa');
+  span.setAttribute('jjjjjjjjjjjjjjjjjjjj', 'aaaaaaaaaaaaaaaaaaaa');
+  span.end()
+})
+.run({ 'async': true });

benchmark/index.js

@@ -0,0 +1,2 @@
+
+require('./create-spans');

package.json

@@ -34,23 +34,22 @@
     "lint:markdown:fix": "./node_modules/.bin/markdownlint $(git ls-files '*.md') -i ./CHANGELOG.md --fix",
     "reset": "lerna clean -y && rm -rf node_modules && npm i && npm run compile && npm run lint:fix",
     "update-ts-configs": "node scripts/update-ts-configs.js",
-
     "comment_prepare_1": "echo scripts in this section automatically prepare releases. Intended for use by maintainers only.",
     "comment_prepare_2": "echo experimental preparation scripts only prepare experimental packages",
     "prepare_release:experimental:patch": "npm run _check:no_changes && npm run _backup:lerna && npm run _lerna:remove_api && npm run _lerna:remove_stable && npm run _lerna:version_patch && npm run _restore:lerna",
     "prepare_release:experimental:minor": "npm run _check:no_changes && npm run _backup:lerna && npm run _lerna:remove_api && npm run _lerna:remove_stable && npm run _lerna:version_minor && npm run _restore:lerna",
     "comment_prepare_3": "echo sdk preparation scripts prepare all stable and experimental packages",
     "prepare_release:sdk:patch": "npm run _check:no_changes && npm run _backup:lerna && npm run _lerna:remove_api && npm run _lerna:version_patch && npm run _restore:lerna",
     "prepare_release:sdk:minor": "npm run _check:no_changes && npm run _backup:lerna && npm run _lerna:remove_api && npm run _lerna:version_minor && npm run _restore:lerna",
-
     "comment_internal": "echo scripts below this line are for internal use",
     "_check:no_changes": "if [ ! -z \"$(git status -uall --porcelain)\" ]; then echo Please ensure all changes are committed; exit 1; fi",
     "_backup:lerna": "cp lerna.json lerna.json.backup",
     "_restore:lerna": "mv lerna.json.backup lerna.json",
     "_lerna:remove_api": "node -e 'var fs=require(\"fs\");var l=require(\"./lerna.json\");l.packages=l.packages.filter(p=>p!==\"api\");fs.writeFileSync(\"lerna.json\",JSON.stringify(l,null,2))'",
     "_lerna:remove_stable": "node -e 'var fs=require(\"fs\");var l=require(\"./lerna.json\");l.packages=l.packages.filter(p=>p!==\"packages/*\");fs.writeFileSync(\"lerna.json\",JSON.stringify(l,null,2))'",
     "_lerna:version_patch": "npx lerna version patch --exact --no-git-tag-version --no-push --yes",
-    "_lerna:version_minor": "npx lerna version minor --exact --no-git-tag-version --no-push --yes"
+    "_lerna:version_minor": "npx lerna version minor --exact --no-git-tag-version --no-push --yes",
+    "benchmark": "node benchmark | tee benchmarks.txt"
   },
   "repository": "open-telemetry/opentelemetry-js",
   "keywords": [
@@ -63,16 +62,17 @@
   "author": "OpenTelemetry Authors",
   "license": "Apache-2.0",
   "devDependencies": {
+    "@lerna/legacy-package-management": "7.1.3",
     "@typescript-eslint/eslint-plugin": "5.59.11",
     "@typescript-eslint/parser": "5.59.11",
+    "benchmark": "^2.1.4",
     "eslint": "8.44.0",
     "eslint-config-prettier": "8.5.0",
     "eslint-plugin-header": "3.1.1",
     "eslint-plugin-node": "11.1.0",
     "eslint-plugin-prettier": "4.2.1",
     "gh-pages": "5.0.0",
     "lerna": "7.1.3",
-    "@lerna/legacy-package-management": "7.1.3",
     "linkinator": "5.0.1",
     "markdownlint-cli": "0.35.0",
     "prettier": "2.8.8",