Improve Performance

.gitignore

@@ -14,7 +14,6 @@ vendor
 build
 dest
 dist
-lib
 lib-cov
 coverage
 nbproject

.npmrc

@@ -0,0 +1 @@
+package-lock=false

Readme.md

@@ -139,14 +139,17 @@ passing an object with the necessary strings. For example:
 ```js
 import { i18n } from "dateformat";
 
-i18n.dayNames = [
+i18n.dayNamesShort = [
   "Sun",
   "Mon",
   "Tue",
   "Wed",
   "Thu",
   "Fri",
   "Sat",
+];
+
+i18n.dayNamesLong = [
   "Sunday",
   "Monday",
   "Tuesday",
@@ -156,7 +159,7 @@ i18n.dayNames = [
   "Saturday",
 ];
 
-i18n.monthNames = [
+i18n.monthNamesShort = [
   "Jan",
   "Feb",
   "Mar",
@@ -169,6 +172,9 @@ i18n.monthNames = [
   "Oct",
   "Nov",
   "Dec",
+];
+
+i18n.monthNamesLong = [
   "January",
   "February",
   "March",

benchmark/benchmark-dateformatter.js

@@ -0,0 +1,63 @@
+import { Bench } from "tinybench"
+import { DateFormatter } from "../date-formatter.js"
+
+const masks = [
+  "d",
+  "W",
+  "o",
+  "N",
+  "H",
+  "S",
+  "L",
+  "yy",
+  "yyyy",
+  "default",
+  "shortDate", "paddedShortDate", "mediumDate", "longDate", "fullDate", "isoDate",
+  "shortTime", "mediumTime", "longTime", "isoTime",
+  "isoDateTime", "isoUtcDateTime",
+  "expiresHeaderFormat"
+];
+
+const bench = new Bench({ name: 'simple benchmark', time: 100 })
+
+masks.forEach((mask) => {
+  const date = new Date();
+  const dateFormatter = new DateFormatter(mask);
+  bench.add(`DateFormatter ${mask}`, () => {
+    dateFormatter.format(date);
+  });
+});
+
+{
+  const date = new Date();
+  const dateFormatter = new DateFormatter("DDDD");
+
+  bench.add(`DateFormatter DDDD - today`, () => {
+    dateFormatter.format(date);
+  });
+}
+
+{
+  const date = new Date()
+  date.setDate(new Date().getDate() + 1);
+
+  const dateFormatter = new DateFormatter("DDDD");
+  bench.add(`DateFormatter DDDD - tomorrow`, () => {
+    dateFormatter.format(date);
+  });
+}
+
+{
+  const date = new Date()
+  date.setDate(new Date().getDate() - 1);
+
+  const dateFormatter = new DateFormatter("DDDD");
+  bench.add(`DateFormatter DDDD - yesterday`, () => {
+    dateFormatter.format(date);
+  });
+}
+
+await bench.run()
+
+console.log(bench.name)
+console.table(bench.table())

benchmark/benchmark.js

@@ -1,38 +1,56 @@
-var previousDateFormat = require("./previousDateFormat");
-var newDateFormat = require("../lib/dateformat");
+import { Bench } from "tinybench"
+import dateFormat from "../lib/dateformat.js";
 
 const masks = [
   "d",
   "W",
   "o",
   "N",
-  "shortDate",
-  "fullDate",
-  "longTime",
+  "H",
+  "S",
+  "L",
+  "yy",
+  "yyyy",
   "default",
+  "shortDate", "paddedShortDate", "mediumDate", "longDate", "fullDate", "isoDate",
+  "shortTime", "mediumTime", "longTime", "isoTime",
+  "isoDateTime", "isoUtcDateTime",
+  "expiresHeaderFormat"
 ];
-let results = [];
+
+const bench = new Bench({ name: 'simple benchmark', time: 100 })
 
 masks.forEach((mask) => {
-  const previousSpeed = getSpeed(false, mask);
-  const newSpeed = getSpeed(true, mask);
-  results.push({
-    mask: mask,
-    previous: previousSpeed + "ms",
-    new: newSpeed + "ms",
-    improvement: Math.round((previousSpeed / newSpeed - 1) * 100, 2) + "%",
+  const date = new Date();
+  bench.add(mask, () => {
+    dateFormat(date, mask);
   });
 });
 
-function getSpeed(newVersion, mask) {
-  const startTime = new Date();
+{
   const date = new Date();
-  for (var i = 0; i < 100_000; i++) {
-    if (newVersion) newDateFormat(date, mask);
-    else previousDateFormat(date, mask);
-  }
-  const endTime = new Date();
-  return endTime - startTime;
+  bench.add("DDDD - today", () => {
+    dateFormat(date, "DDDD");
+  });
+}
+
+{
+  const date = new Date()
+  date.setDate(new Date().getDate() + 1);
+  bench.add("DDDD - tomorrow", () => {
+    dateFormat(date, "DDDD");
+  });
 }
 
-console.table(results);
+{
+  const date = new Date()
+  date.setDate(new Date().getDate() - 1);
+  bench.add("DDDD - yesterday", () => {
+    dateFormat(date, "DDDD");
+  });
+}
+
+await bench.run()
+
+console.log(bench.name)
+console.table(bench.table())