diff --git a/Build/build-internal-cdn-rules.ts b/Build/build-internal-cdn-rules.ts
index 720f3350..adb26e13 100644
--- a/Build/build-internal-cdn-rules.ts
+++ b/Build/build-internal-cdn-rules.ts
@@ -53,7 +53,7 @@ export const buildInternalCDNDomains = task(import.meta.path, async () => {
         addApexDomain(line.replace('DOMAIN,', ''));
       } else if (line.startsWith('DOMAIN-KEYWORD')) {
         keywords.add(escapeRegExp(line.replace('DOMAIN-KEYWORD,', '')));
-      } else if (line.startsWith('USER-AGENT,') || line.startsWith('PROCESS-NAME,')) {
+      } else if (line.startsWith('USER-AGENT,') || line.startsWith('PROCESS-NAME,') || line.startsWith('URL-REGEX,')) {
         // do nothing
       } else if (processLine(line)) {
         console.warn('[drop line from ruleset]', line);
diff --git a/Build/lib/create-file.ts b/Build/lib/create-file.ts
index c6360216..fd86c7ee 100644
--- a/Build/lib/create-file.ts
+++ b/Build/lib/create-file.ts
@@ -21,7 +21,7 @@ export async function compareAndWriteFile(linesA: string[], filePath: string) {
       const lineA = linesA[index];
       index++;
 
-      if (lineA === undefined) {
+      if (typeof lineA !== 'string') {
         // The file becomes smaller
         isEqual = false;
         break;
diff --git a/Build/lib/parse-filter.ts b/Build/lib/parse-filter.ts
index 6817f827..c8695b6e 100644
--- a/Build/lib/parse-filter.ts
+++ b/Build/lib/parse-filter.ts
@@ -4,7 +4,6 @@ import * as tldts from './cached-tld-parse';
 import { fetchRemoteTextAndCreateReadlineInterface } from './fetch-remote-text-by-line';
 import { NetworkFilter } from '@cliqz/adblocker';
 import { processLine } from './process-line';
-import { performance } from 'perf_hooks';
 import { getGorhillPublicSuffixPromise } from './get-gorhill-publicsuffix';
 import type { PublicSuffixList } from 'gorhill-publicsuffixlist';
 
@@ -104,7 +103,7 @@ export async function processFilterRules(
   filterRulesUrl: string | URL,
   fallbackUrls?: ReadonlyArray<string | URL> | undefined
 ): Promise<{ white: Set<string>, black: Set<string>, foundDebugDomain: boolean }> {
-  const runStart = performance.now();
+  const runStart = Bun.nanoseconds();
 
   const whitelistDomainSets = new Set<string>();
   const blacklistDomainSets = new Set<string>();
@@ -174,10 +173,10 @@ export async function processFilterRules(
 
   if (!fallbackUrls || fallbackUrls.length === 0) {
     downloadTime = 0;
-    let last = performance.now();
+    let last = Bun.nanoseconds();
     for await (const line of await fetchRemoteTextAndCreateReadlineInterface(filterRulesUrl)) {
-      const now = performance.now();
-      downloadTime += performance.now() - last;
+      const now = Bun.nanoseconds();
+      downloadTime += Bun.nanoseconds() - last;
       last = now;
       // don't trim here
       lineCb(line);
@@ -185,7 +184,7 @@ export async function processFilterRules(
   } else {
     let filterRules;
 
-    const downloadStart = performance.now();
+    const downloadStart = Bun.nanoseconds();
     try {
       const controller = new AbortController();
 
@@ -205,15 +204,15 @@ export async function processFilterRules(
       console.log(`Download Rule for [${filterRulesUrl.toString()}] failed`);
       throw e;
     }
-    downloadTime = performance.now() - downloadStart;
+    downloadTime = Bun.nanoseconds() - downloadStart;
 
     for (let i = 0, len = filterRules.length; i < len; i++) {
       lineCb(filterRules[i]);
     }
   }
 
-  console.log(`   ┬ processFilterRules (${filterRulesUrl.toString()}): ${(performance.now() - runStart).toFixed(3)}ms`);
-  console.log(`   └── download time: ${downloadTime.toFixed(3)}ms`);
+  console.log(`   ┬ processFilterRules (${filterRulesUrl.toString()}): ${((Bun.nanoseconds() - runStart) / 1e6).toFixed(3)}ms`);
+  console.log(`   └── download time: ${(downloadTime / 1e6).toFixed(3)}ms`);
 
   return {
     white: whitelistDomainSets,
diff --git a/Build/lib/text-decoder-stream.ts b/Build/lib/text-decoder-stream.ts
index 4dc51407..04502696 100644
--- a/Build/lib/text-decoder-stream.ts
+++ b/Build/lib/text-decoder-stream.ts
@@ -28,9 +28,7 @@ export class PolyfillTextDecoderStream extends TransformStream<Uint8Array, strin
     super({
       transform(chunk: Uint8Array, controller: TransformStreamDefaultController<string>) {
         const decoded = decoder.decode(chunk);
-        if (decoded.length > 0) {
-          controller.enqueue(decoded);
-        }
+        controller.enqueue(decoded);
       },
       flush(controller: TransformStreamDefaultController<string>) {
         // If {fatal: false} is in options (the default), then the final call to
diff --git a/Build/lib/trace-runner.ts b/Build/lib/trace-runner.ts
index b2bf732f..860c73bc 100644
--- a/Build/lib/trace-runner.ts
+++ b/Build/lib/trace-runner.ts
@@ -1,19 +1,19 @@
 import path from 'path';
 
 const traceSync = <T>(prefix: string, fn: () => T): T => {
-  const start = performance.now();
+  const start = Bun.nanoseconds();
   const result = fn();
-  const end = performance.now();
-  console.log(`${prefix}: ${(end - start).toFixed(3)}ms`);
+  const end = Bun.nanoseconds();
+  console.log(`${prefix}: ${((end - start) / 1e6).toFixed(3)}ms`);
   return result;
 };
 export { traceSync };
 
 const traceAsync = async <T>(prefix: string, fn: () => Promise<T>): Promise<T> => {
-  const start = performance.now();
+  const start = Bun.nanoseconds();
   const result = await fn();
-  const end = performance.now();
-  console.log(`${prefix}: ${(end - start).toFixed(3)}ms`);
+  const end = Bun.nanoseconds();
+  console.log(`${prefix}: ${((end - start) / 1e6).toFixed(3)}ms`);
   return result;
 };
 export { traceAsync };
@@ -28,10 +28,10 @@ const task = <T>(importMetaPath: string, fn: () => Promise<T>, customname: strin
   const taskName = customname ?? path.basename(importMetaPath, path.extname(importMetaPath));
   return async () => {
     console.log(`🏃 [${taskName}] Start executing`);
-    const start = performance.now();
+    const start = Bun.nanoseconds();
     await fn();
-    const end = performance.now();
-    console.log(`✅ [${taskName}] Executed successfully: ${(end - start).toFixed(3)}ms`);
+    const end = Bun.nanoseconds();
+    console.log(`✅ [${taskName}] Executed successfully: ${((end - start) / 1e6).toFixed(3)}ms`);
 
     return { start, end, taskName } as TaskResult;
   };