⚡ perf

Author: UltiRequiem

src/functions/bean_counting.bench.ts

@@ -0,0 +1,24 @@
+import { countChar, countCharCool } from "./bean_counting.ts";
+
+const lorem = `Lorem ipsum dolor sit amet, consectetur adipiscing
+elit. Donec iaculis enim et sem pharetra sagittis.
+Nunc semper, neque id volutpat aliquet, sapien diam vehicula augue,
+semper efficitur mauris ipsum ut justo. Aenean urna tortor,
+tempus vitae sodales non, posuere id mauris. Quisque consectetur,
+turpis sed sagittis fermentum, orci magna pharetra sem, vitae vulputate
+risus urna vitae eros. Aenean sagittis ipsum dolor, sed iaculis lacus
+faucibus sit amet. Proin at suscipit dolor. Sed volutpat ipsum id metus
+dictum gravida. Curabitur ut diam ac sapien finibus mattis.
+
+Vivamus lobortis suscipit lorem, quis rutrum quam molestie quis.
+In hac habitasse platea dictumst. Nunc id mi id ipsum consequat
+dictum vitae a mi. Quisque sapien est, consequat nec neque aliquet,
+porttitor mollis leo.`;
+
+Deno.bench("[countCharCool]", { group: "Counting" }, () => {
+  countCharCool(lorem, "q");
+});
+
+Deno.bench("[countCharRegex]", { group: "Counting" }, () => {
+  countChar(lorem, "q");
+});

src/functions/bean_counting.test.ts

@@ -1,21 +1,32 @@
 import {
   countBs,
   countChar,
+  countCharCool,
   counterOcurrencesCreator,
 } from "./bean_counting.ts";
 import { assertEquals } from "../../deps.ts";
 
+const lorem = `Lorem ipsum dolor sit amet, consectetur adipiscing elit.`;
+
 Deno.test("[countBs]", () => {
   assertEquals(countBs("BBBaB"), 4);
-  assertEquals(countBs("111aaa"), 0);
+  assertEquals(countBs(lorem), 0);
+});
+
+Deno.test("[countCharCool]", () => {
+  assertEquals(countCharCool(lorem, "o"), 4);
 });
 
 Deno.test("[countChar]", () => {
-  assertEquals(countChar("BBBa", "B"), 3);
+  assertEquals(countChar(lorem, "s"), 4);
 });
 
 Deno.test("[counterOcurrencesCreator]", () => {
-  const countEs = counterOcurrencesCreator("E");
+  const countEs = counterOcurrencesCreator("e");
+
+  assertEquals(countEs(lorem), 5);
+});
 
-  assertEquals(countEs("EEEEaaa33"), 4);
+Deno.test("[countChar vs countCharCool]", () => {
+  assertEquals(countCharCool(lorem, "c"), countChar(lorem, "c"));
 });

src/functions/bean_counting.ts

@@ -1,8 +1,15 @@
-export function countChar(text: string, charToSearch: string) {
+export function countCharCool(text: string, charToSearch: string) {
   const { length } = [...text].filter((letter) => letter === charToSearch);
   return length;
 }
 
+// Almost 9 times faster!
+export function countChar(text: string, charToSearch: string) {
+  const expression = new RegExp(charToSearch, "gi");
+  const { length } = text.match(expression) ?? [];
+  return length;
+}
+
 export function counterOcurrencesCreator(charToSearch: string) {
   return (text: string) => countChar(text, charToSearch);
 }