perf: cache regular expresions for string formatters

dist/cdn/formatters/string.js

@@ -5,9 +5,10 @@ function stringFormatter(opts = {}) {
   if (!quote || quote === escapedQuote) {
     return (value) => value;
   }
+  const quoteRegExp = new RegExp(quote, "g");
   return (value) => {
     if (value.includes(quote)) {
-      value = value.replace(new RegExp(quote, "g"), escapedQuote);
+      value = value.replace(quoteRegExp, escapedQuote);
     }
     return `${quote}${value}${quote}`;
   };

dist/cdn/formatters/stringExcel.js

@@ -1,8 +1,9 @@
 // packages/formatters/src/stringExcel.ts
 var quote = '"';
 var escapedQuote = '""""';
+var quoteRegExp = new RegExp(quote, "g");
 function stringExcel(value) {
-  return `"=""${value.replace(new RegExp(quote, "g"), escapedQuote)}"""`;
+  return `"=""${value.replace(quoteRegExp, escapedQuote)}"""`;
 }
 export {
   stringExcel as default

dist/cdn/whatwg/index.js

@@ -1,6 +1,8 @@
 // packages/whatwg/src/index.ts
 import { default as default2 } from "./AsyncParser.js";
-import { default as default3 } from "./TransformStream.js";
+import {
+  default as default3
+} from "./TransformStream.js";
 export {
   default2 as AsyncParser,
   default3 as TransformStream

packages/formatters/src/string.ts

@@ -18,9 +18,10 @@ export default function stringFormatter(
     return (value) => value;
   }
 
+  const quoteRegExp = new RegExp(quote, 'g');
   return (value) => {
     if (value.includes(quote)) {
-      value = value.replace(new RegExp(quote, 'g'), escapedQuote);
+      value = value.replace(quoteRegExp, escapedQuote);
     }
 
     return `${quote}${value}${quote}`;

packages/formatters/src/stringExcel.ts

@@ -1,6 +1,7 @@
 const quote = '"';
 const escapedQuote = '""""';
 
+const quoteRegExp = new RegExp(quote, 'g');
 export default function stringExcel(value: string) {
-  return `"=""${value.replace(new RegExp(quote, 'g'), escapedQuote)}"""`;
+  return `"=""${value.replace(quoteRegExp, escapedQuote)}"""`;
 }

packages/test-helpers/utils.ts

@@ -1,9 +1,10 @@
+const lfRegExp = new RegExp('(?<!\r)\n', 'g');
 export function forceCrlfEol(content: string): string {
   // eslint-disable-next-line no-control-regex
-  return content.replace(new RegExp('(?<!\r)\n', 'g'), '\r\n');
+  return content.replace(lfRegExp, '\r\n');
 }
-
+const crlfRegExp = new RegExp('\r\n', 'g');
 export function forceLfEol(content: string): string {
   // eslint-disable-next-line no-control-regex
-  return content.replace(new RegExp('\r\n', 'g'), '\n');
+  return content.replace(crlfRegExp, '\n');
 }