Filter and filter by hand.

Makefile

@@ -2,4 +2,5 @@ all: .
 	make -C class-prototype
 	make -C named_function-arrow_function
 	make -C hidden_class-no_extra_hidden_class
-	make -C foreach-for
+	make -C foreach-for
+	make -C filter-filter_by_hand

README.md

@@ -6,6 +6,7 @@
 - [Named function and arrow function](named_function-arrow_function/#readme)
 - [Hidden class and No extra hidden class](hidden_class-no_extra_hidden_class/#readme)
 - [forEach and for](foreach-for/#readme)
+- [filter and filter by hand](filter-filter_by_hand/#readme)
 
 ### How to push a test case
 

filter-filter_by_hand/.eslintrc.json

@@ -0,0 +1,3 @@
+{
+  "extends": "semistandard"
+}

filter-filter_by_hand/Makefile

@@ -0,0 +1,47 @@
+bench: lint
+	npm run benchmark > out.txt
+	npm run benchmark > out.txt
+	npm run benchmark > out.txt
+	tail -n 23 out.txt > bench.txt
+	rm out.txt
+	node --prof prof-filter.js > /dev/null
+	node --prof-process *.log > out.txt
+	grep -A 5 "Summary" -R out.txt > tick-filter.txt
+	rm *.log && rm out.txt
+	node --prof prof-filter_by_hand.js > /dev/null
+	node --prof-process *.log > out.txt
+	grep -A 5 "Summary" -R out.txt > tick-filter_by_hand.txt
+	rm *.log && rm out.txt && touch README.md && rm README.md
+	echo '## Benchmark' >> README.md
+	echo ' ' >> README.md
+	echo '```' >> README.md
+	cat bench.txt >> README.md
+	echo '```' >> README.md
+	echo ' ' >> README.md
+	echo '## Profile summary' >> README.md
+	echo ' ' >> README.md
+	echo 'Tick-filter' >> README.md
+	echo '```' >> README.md
+	cat tick-filter.txt >> README.md
+	echo '```' >> README.md
+	echo ' ' >> README.md
+	echo 'Tick-filter_by_hand' >> README.md
+	echo '```' >> README.md
+	cat tick-filter_by_hand.txt >> README.md
+	echo '```' >> README.md
+	echo ' ' >> README.md
+	rm *.txt
+lint: node_modules
+	npm run lint
+
+clean:
+	rm -rf node_modules
+
+node_modules: init
+	npm install
+
+init: .
+	cp ../package.json .
+	cp ../.eslintrc.json .
+
+.PHONY: init

filter-filter_by_hand/README.md

@@ -0,0 +1,50 @@
+## Benchmark
+
+```
+filterByHand
+Raw:
+ > 18203.796203796202
+ > 18307.69230769231
+ > 18639.36063936064
+ > 18612.38761238761
+Average (mean) 18440.80919080919
+
+filterr
+Raw:
+ > 2040.959040959041
+ > 2050.949050949051
+ > 2050.949050949051
+ > 2046.9530469530469
+Average (mean) 2047.4525474525476
+
+Winner: filterByHand
+Compared with next highest (filterr), it's:
+88.9% faster
+9.01 times as fast
+0.95 order(s) of magnitude faster
+QUITE A BIT FASTER
+
+```
+
+## Profile summary
+
+Tick-filter
+```
+ [Summary]:
+   ticks  total  nonlib   name
+   3123   32.9%   33.2%  JavaScript
+   5638   59.4%   59.9%  C++
+    330    3.5%    3.5%  GC
+     85    0.9%          Shared libraries
+```
+
+Tick-filter_by_hand
+```
+ [Summary]:
+   ticks  total  nonlib   name
+   7675   82.0%   87.3%  JavaScript
+    516    5.5%    5.9%  C++
+    232    2.5%    2.6%  GC
+    564    6.0%          Shared libraries
+```
+

filter-filter_by_hand/benchmark.js

@@ -0,0 +1,29 @@
+'use strict';
+
+const games = [
+  { name: 'Doom', year: 1993 },
+  { name: 'Golden Axe', year: 1989 },
+  { name: 'Gauntlet', year: 1985 },
+  { name: 'Frostbite', year: 1983 },
+  { name: 'Tiger Heli', year: 1985 }
+];
+
+function filterByHand () {
+  let oldGames = [];
+  for (let i = 0; i < games.length; i++) {
+    if (games[i].year <= 1985) {
+      oldGames.push(games[i]);
+    }
+  }
+}
+
+exports.compare = {
+  'filterr': function () {
+    let weAreOld = games.filter(g => g.year <= 1985); // eslint-disable-line
+  },
+  'filterByHand': function () {
+    filterByHand();
+  }
+};
+
+require('bench').runMain();

filter-filter_by_hand/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "perf-quest",
+  "version": "0.0.1",
+  "description": "Comparison between js features.",
+  "main": "index.js",
+  "scripts": {
+    "lint": "eslint .",
+    "benchmark": "node benchmark.js"
+  },
+  "devDependencies": {
+    "bench": "^0.3.6",
+    "eslint": "^3.3.1",
+    "eslint-config-semistandard": "^7.0.0-beta.0",
+    "eslint-config-standard": "^6.0.0",
+    "eslint-plugin-promise": "^2.0.1",
+    "eslint-plugin-react": "^6.1.2",
+    "eslint-plugin-standard": "^2.0.0"
+  }
+}

filter-filter_by_hand/prof-filter.js

@@ -0,0 +1,20 @@
+'use strict';
+
+const games = [
+  { name: 'Doom', year: 1993 },
+  { name: 'Golden Axe', year: 1989 },
+  { name: 'Gauntlet', year: 1985 },
+  { name: 'Frostbite', year: 1983 },
+  { name: 'Tiger Heli', year: 1985 }
+];
+
+exports.compare = {
+  'filterr1': function () {
+    let weAreOld = games.filter(g => g.year <= 1985); // eslint-disable-line
+  },
+  'filterr2': function () {
+    let weAreOld = games.filter(g => g.year <= 1985); // eslint-disable-line
+  }
+};
+
+require('bench').runMain();

filter-filter_by_hand/prof-filter_by_hand.js

@@ -0,0 +1,29 @@
+'use strict';
+
+const games = [
+  { name: 'Doom', year: 1993 },
+  { name: 'Golden Axe', year: 1989 },
+  { name: 'Gauntlet', year: 1985 },
+  { name: 'Frostbite', year: 1983 },
+  { name: 'Tiger Heli', year: 1985 }
+];
+
+function filterByHand () {
+  let oldGames = [];
+  for (let i = 0; i < games.length; i++) {
+    if (games[i].year <= 1985) {
+      oldGames.push(games[i]);
+    }
+  }
+}
+
+exports.compare = {
+  'filterByHand1': function () {
+    filterByHand();
+  },
+  'filterByHand2': function () {
+    filterByHand();
+  }
+};
+
+require('bench').runMain();