Add more comparison tests

tshemsedinov · tshemsedinov · commit 6a8fb864cd45 · 2017-07-30T02:12:54.000+03:00
diff --git a/JavaScript/3-instantiation.js b/JavaScript/3-instantiation.js
@@ -8,7 +8,7 @@ function makeClosure(hello, size, flag) {
 
 function closureInstance() {
   return makeClosure('world', 100500, true);
-};
+}
 
 function defineArray() {
   return ['world', 100500, true];
diff --git a/JavaScript/d-copy-array.js b/JavaScript/d-copy-array.js
diff --git a/JavaScript/e-copy-dataset.js b/JavaScript/e-copy-dataset.js
@@ -0,0 +1,64 @@
+'use strict';
+
+const benchmark = require('./2-benchmark.js');
+
+// Prepare data
+
+const arr = [];
+for (let i = 0; i < 100; i++) {
+  arr[i] = { name: 'item' + ((i - 50) * i) };
+}
+
+// Different implementations
+
+function testSlice() {
+  return arr.slice();
+}
+
+function testSlice0() {
+  return arr.slice(0);
+}
+
+function testConcat() {
+  return [].concat(arr);
+}
+
+function testFor() {
+  const result = [];
+  let len = arr.length;
+  let i;
+  for (i = 0; i < len; i++) {
+    result.push(arr[i]);
+  }
+  return result;
+}
+
+function testForNew() {
+  let len = arr.length;
+  const result = new Array(len);
+  let i;
+  for (i = 0; i < len; i++) {
+    result[i] = arr[i];
+  }
+  return result;
+}
+
+function testForNewLet() {
+  let len = arr.length;
+  const result = new Array(len);
+  for (let i = 0; i < len; i++) {
+    result[i] = arr[i];
+  }
+  return result;
+}
+
+// Run tests
+
+benchmark.do(500000, [
+  testSlice,
+  testSlice0,
+  testConcat,
+  testFor,
+  testForNew,
+  testForNewLet
+]);
diff --git a/JavaScript/f-for-of-each.js b/JavaScript/f-for-of-each.js
@@ -0,0 +1,52 @@
+'use strict';
+
+const benchmark = require('./2-benchmark.js');
+
+const data1 = [
+  -100, -50, -30, -20, -10, 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100
+];
+
+const data2 = [
+  'Descartes', 'Pascal', 'Leibniz', 'Euler', 'Bernoulli', 'Kepler'
+];
+
+function testEachNumber() {
+  const a = Array(data1.length);
+  data1.forEach((item, i) => {
+    a[i] = data1[i];
+  });
+  return a;
+}
+
+function testForOfNumber() {
+  const a = Array(data1.length);
+  let i = 0;
+  for (let n of data1) {
+    a[i++] = n;
+  }
+  return a;
+}
+
+function testEachString() {
+  const a = Array(data2.length);
+  data2.forEach((item, i) => {
+    a[i] = data2[i];
+  });
+  return a;
+}
+
+function testForOfString() {
+  const a = Array(data2.length);
+  let i = 0;
+  for (let s of data2) {
+    a[i++] = s;
+  }
+  return a;
+}
+
+benchmark.do(5000000, [
+  testEachNumber,
+  testForOfNumber,
+  testEachString,
+  testForOfString,
+]);
