perf: optimize regex, remove uuid()

README.md

@@ -535,7 +535,7 @@ Please see our [Upgrade Guide](./UPGRADING.md) for specific steps.
 
 ### Compatibility with OTel packages
 
-The SDK is built on top of OpenTelemetry and, as such, it is possible to use it alongside other OTel libraries. 
+The SDK is built on top of OpenTelemetry and, as such, it is possible to use it alongside other OTel libraries.
 **Important: New projects should use OpenTelemetry 2.x.**
 OpenTelemetry 1.x support is limited to 1.x versions of the SDK, which are deprecated.
 
@@ -605,7 +605,6 @@ module.exports = {
         __dirname,
         './node_modules/@opentelemetry/semantic-conventions/build/src/index-incubating.js'
       ),
-      uuid: path.resolve(__dirname, './node_modules/uuid/dist/index.js'),
     },
   },
 };

package.json

@@ -108,7 +108,6 @@
     "@opentelemetry/semantic-conventions": "1.38.0",
     "@opentelemetry/web-common": "0.208.0",
     "hoist-non-react-statics": "3.3.2",
-    "uuid": "13.0.0",
     "web-vitals": "5.1.0"
   },
   "devDependencies": {

src/processors/EmbraceNetworkSpanProcessor/types.ts

@@ -29,8 +29,6 @@ interface NetworkSpan extends ReadableSpan {
   attributes: NetworkSpanAttributes;
 }
 
-const SCHEME_RE = /.+:\/\/.+/;
-
 export const isNetworkSpan = (
   span: ReadableSpan | NetworkSpan,
 ): span is NetworkSpan => {
@@ -43,7 +41,7 @@ export const isNetworkSpan = (
     const url =
       span.attributes[ATTR_URL_FULL] ?? span.attributes[SEMATTRS_HTTP_URL];
 
-    return !!(url && typeof url === 'string' && SCHEME_RE.exec(url));
+    return typeof url === 'string' && url.includes('://');
   }
 
   return false;

src/utils/generateUUID.test.ts

@@ -25,4 +25,15 @@ describe('generateUUID', () => {
     const uuid2 = generateUUID();
     expect(uuid1).to.not.equal(uuid2);
   });
+
+  it('should only contain valid hex characters', () => {
+    const validHex = /^[0-9A-F]+$/;
+    for (let i = 0; i < 100; i++) {
+      const uuid = generateUUID();
+      expect(uuid).to.match(
+        validHex,
+        `UUID ${uuid} contains invalid characters`,
+      );
+    }
+  });
 });

src/utils/generateUUID.ts

@@ -1,3 +1,16 @@
-import { v4 as uuid } from 'uuid';
+const UUID_BYTES = 16;
+const BUFFER = new Uint8Array(UUID_BYTES);
 
-export const generateUUID = () => uuid().replace(/-/g, '').toUpperCase();
+// Pre-computed uppercase hex lookup - faster than toString(16) in browsers
+const HEX: string[] = Array.from({ length: 256 }, (_, i) =>
+  i.toString(16).padStart(2, '0').toUpperCase(),
+);
+
+export const generateUUID = (): string => {
+  crypto.getRandomValues(BUFFER);
+  let hex = '';
+  for (let i = 0; i < UUID_BYTES; i++) {
+    hex += HEX[BUFFER[i]];
+  }
+  return hex;
+};

tests/integration/platforms/webpack-4/webpack.config.js

@@ -14,7 +14,6 @@ module.exports = {
         __dirname,
         './node_modules/@opentelemetry/semantic-conventions/build/src/index-incubating.js',
       ),
-      uuid: path.resolve(__dirname, './node_modules/uuid/dist/index.js'),
     },
   },
   devServer: {

tests/performance/biome.jsonc

@@ -4,7 +4,7 @@
   "linter": {
     "rules": {
       "correctness": {
-        // functions defined in html are not detected as used
+        // functions defined in html are not detected as in use
         "noUnusedVariables": {
           "level": "off"
         }

tests/performance/config/thresholds.ts

@@ -18,7 +18,7 @@ const TOTAL_TASK_DURATION_THRESHOLD_IN_MS = getFromEnv(
 );
 const TOTAL_HEAP_SIZE_THRESHOLD_IN_MB = getFromEnv(
   'TOTAL_HEAP_SIZE_THRESHOLD_IN_MB',
-  15,
+  16,
 );
 const TOTAL_BLOCKING_TIME_THRESHOLD_IN_MS = getFromEnv(
   'TOTAL_BLOCKING_TIME_THRESHOLD_IN_MS',

tests/performance/tsconfig.json

@@ -1,11 +1,13 @@
 {
   "compilerOptions": {
+    "allowImportingTsExtensions": true,
     "target": "ES2020",
     "module": "ESNext",
-    "moduleResolution": "Node",
+    "moduleResolution": "bundler",
     "esModuleInterop": true,
     "resolveJsonModule": true,
     "strict": true,
-    "outDir": "dist"
+    "outDir": "dist",
+    "noEmit": true
   }
 }