dockerize the appHEADmasterdevelopment

1 files changed, 112 insertions, 0 deletions

diff --git a/app/benchmark/find.js b/app/benchmark/find.js
new file mode 100644
index 0000000..1e86c24
--- /dev/null
+++ b/app/benchmark/find.js
@@ -0,0 +1,112 @@
+/**
+ * benchmark: find a product in product list
+ * using: for vs forEach vs find
+ */
+
+const microtime = require('microtime');
+
+var products = require('../../data/products.json');
+if (products.length == 0) {
+    const prepare = require('../pieces/prepare.js');
+    prepare.load_products(
+        'https://storage.googleapis.com/pythia-files/uploads/json/emarket-products.json'
+    );
+}
+
+
+
+var selected = [];
+products.forEach( pr => {
+    if (Math.floor(Math.random() * 100) > 85) {
+        selected.push(pr.id);
+    }
+});
+
+
+function compare() {
+
+    let n = 4;
+
+    var f0 = microtime.nowDouble();
+    for(i=0 ; i < n ; i++) byFor();
+    var f1 = microtime.nowDouble();
+    // 
+    var e0 = microtime.nowDouble();
+    for(i=0 ; i < n ; i++) byEach();
+    var e1 = microtime.nowDouble();
+    //
+    var b0 = microtime.nowDouble();
+    for(i=0 ; i < n ; i++) byFind();
+    var b1 = microtime.nowDouble();
+
+    return {
+        n: n,
+        
+        for: f1-f0,
+        items_for: byFor(),
+
+        each: e1-e0,
+        items_each: byEach(),
+
+        find: b1-b0,
+        items_find: byFind(),
+
+        sel: selected,
+    }
+}
+
+
+function byFor() {
+    var items = [];
+    var notFound = [];
+    var found;
+    selected.forEach( id => {
+        found = false;
+        for(i = 0; i < products.length; i++) {
+            if (products[i].id == id) {
+                items.push(products[i]);
+                found = true;
+                break;
+            }
+        }
+        if (!found) notFound.push(id)
+
+    })
+    return {items: items, nf: notFound};
+}
+
+
+function byEach() {
+    var items = [];
+    var notFound = [];
+    var found;
+    selected.forEach( id => {
+        found = false;
+        products.forEach( pr => {
+            if (pr.id == id) {
+                items.push(pr);
+                found = true;
+            }
+        });
+        if (!found) notFound.push(id)
+    });
+    return {items: items, nf: notFound};
+}
+
+function byFind() {
+    var items = [];
+    var notFound = [];
+    var result;
+    selected.forEach( id => {
+        found = false;
+        result = products.find((pr) => pr.id == id);
+        if (result === undefined) notFound.push(id)
+        else items.push(result);
+    });
+    return {items: items, nf: notFound};
+}
+
+module.exports = {
+    compare,
+    byFor
+}
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