Perf: make sort domain faster

Build/lib/stable-sort-domain.bench.ts

@@ -1,5 +1,4 @@
 import { fetchRemoteTextByLine } from './fetch-text-by-line';
-import { getGorhillPublicSuffixPromise } from './get-gorhill-publicsuffix';
 import { processLineFromReadline } from './process-line';
 import { sortDomains } from './stable-sort-domain';
 

Build/lib/stable-sort-domain.test.ts

@@ -1,21 +1,7 @@
 // eslint-disable-next-line import-x/no-unresolved -- bun
 import { describe, expect, it } from 'bun:test';
 
-import { compare, sortDomains } from './stable-sort-domain';
-
-describe('compare', () => {
-  it('basic', () => {
-    expect(
-      compare('.s3-website.ap-northeast-3.amazonaws.com', '.s3.dualstack.ap-south-1.amazonaws.com')
-    ).toBe(1);
-  });
-
-  it('basic', () => {
-    expect(
-      compare('.s3-website.ap-northeast-3.amazonaws.com', '.s3.dualstack.ap-south-1.amazonaws.com')
-    ).toBe(1);
-  });
-});
+import { sortDomains } from './stable-sort-domain';
 
 describe('sortDomains', () => {
   it('basic', () => {

Build/lib/stable-sort-domain.ts

@@ -6,36 +6,20 @@ export const compare = (a: string, b: string) => {
 
   const aLen = a.length;
   const r = aLen - b.length;
-  if (r > 0) {
-    return 1;
-  }
-  if (r < 0) {
-    return -1;
-  }
-
-  for (let i = 0; i < aLen; i++) {
-    // if (b[i] == null) {
-    //   return 1;
-    // }
-    if (a[i] < b[i]) {
-      return -1;
-    }
-    if (a[i] > b[i]) {
-      return 1;
-    }
-  }
-  return 0;
+  if (r !== 0) return r;
+
+  return a.localeCompare(b);
 };
 
 const tldtsOpt = { allowPrivateDomains: false, detectIp: false, validateHostname: false };
 
 export const sortDomains = (inputs: string[]) => {
-  const domains = inputs.reduce<Map<string, string>>((acc, cur) => {
-    if (!acc.has(cur)) {
+  const domains = inputs.reduce<Map<string, string>>((domains, cur) => {
+    if (!domains.has(cur)) {
       const topD = tldts.getDomain(cur, tldtsOpt);
-      acc.set(cur, topD ?? cur);
+      domains.set(cur, topD ?? cur);
     };
-    return acc;
+    return domains;
   }, new Map());
 
   const sorter = (a: string, b: string) => {
@@ -47,7 +31,7 @@ export const sortDomains = (inputs: string[]) => {
     if (a === $a && b === $b) {
       return compare(a, b);
     }
-    return compare($a, $b) || compare(a, b);
+    return $a.localeCompare($b) || compare(a, b);
   };
 
   sort(inputs, sorter);