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babel-plugin-fuck-optimization

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babel-plugin-fuck-optimization - npm Package Compare versions

Comparing version 1.0.0 to 2.0.0

7

package.json

		{
		"name": "babel-plugin-fuck-optimization",
		"version": "1.0.0",
		"version": "2.0.0",
		"description": "Plugin for Babel which fucks all the optimizations in your code",
		"main": "src/index.js",
		"scripts": {
		"test": "node test/index.test.js"
		"test": "node --allow-natives-syntax test/index.test.js"
		},
		"author": "ghaiklor",
		"contributors": [
		"bniwredyc"
		],
		"license": "MIT",
		@@ -11,0 +14,0 @@ "devDependencies": {

15

README.md

		@@ -17,14 +17,13 @@ # babel-plugin-fuck-optimization
		function add(a, b) {
		try {} catch (e) {} finally {}

		var deoptimization = {
		var __deoptimization = {
		__proto__: "notsofast"
		};
		with (deoptimization) {
		return a + b;
		}

		return a + b;
		}
		```

		It traverses all the `BlockStatement` and if its parent is `FunctionDeclaration`
		it pushes the new `TryStatement` with `CatchClause` within the `BlockStatement`.
		It traverses all the `BlockStatement` and if its parent is `FunctionDeclaration` or `ClassMethod`
		~~it pushes the new `TryStatement` with `CatchClause` within the `BlockStatement`~~ (optimized in V8 5.3.1)
		it adds an object literal declaration with modified `__proto__` property.

25

src/index.js

		@@ -0,1 +1,3 @@
		var deoptimizationVariableName = '__deoptimization'

		module.exports = function (babel) {
		@@ -15,17 +17,5 @@ var t = babel.types;

		var oldBody = path.node.body.slice(0);

		path.node.body.length = 0;

		var tryCatchStatement = t.tryStatement(
		t.blockStatement([]),
		t.catchClause(t.identifier('e'), t.blockStatement([])),
		t.blockStatement([])
		);

		path.node.body.push(tryCatchStatement);

		var deoptimizationVariableDeclaration = t.variableDeclaration('var', [
		t.variableDeclarator(
		t.identifier('deoptimization'),
		t.identifier(deoptimizationVariableName),
		t.objectExpression([
		@@ -37,10 +27,3 @@ t.objectProperty(t.Identifier('__proto__'), t.stringLiteral('notsofast'))

		path.node.body.push(deoptimizationVariableDeclaration);

		var withStatement = t.withStatement(
		t.identifier('deoptimization'),
		t.blockStatement(oldBody)
		);

		path.node.body.push(withStatement);
		path.node.body.unshift(deoptimizationVariableDeclaration);
		}
		@@ -47,0 +30,0 @@ }

73

test/index.test.js

		var babel = require('babel-core');
		var plugin = require('../src/index.js');

		var INPUT_SOURCE = 'function add(a, b) {return a + b;}';
		var INPUT_SOURCE = 'function testFunction(a, b) {return a + b;}';

		console.log('Transforming: \n' + INPUT_SOURCE + '\n');
		var out = babel.transform(INPUT_SOURCE, {plugins: [plugin]});
		var out = babel.transform(INPUT_SOURCE, { plugins: [plugin] });
		console.log('Transformed to: \n' + out.code + '\n');

		out.code.replace('testFunction', 'deoptimizedTestFunction');

		function testFunction(a, b) {
		return a + b;
		}

		function deoptimizedTestFunction(a, b) {
		var __deoptimization = {
		__proto__: "notsofast"
		};
		return a + b;
		}

		function printStatus(fn) {
		switch (%GetOptimizationStatus(fn)) {
		case 1:
		console.log("Function is optimized");
		break;
		case 2:
		console.log("Function is not optimized");
		break;
		case 3:
		console.log("Function is always optimized");
		break;
		case 4:
		console.log("Function is never optimized");
		break;
		case 6:
		console.log("Function is maybe deoptimized");
		break;
		case 7:
		console.log("Function is optimized by TurboFan");
		break;
		default:
		console.log("Unknown optimization status");
		break;
		}
		}


		//Fill type-info
		testFunction(2, 2);

		// 2 calls are needed to go from uninitialized -> pre-monomorphic -> monomorphic
		testFunction(2, 2);

		%OptimizeFunctionOnNextCall(testFunction);

		//The next call
		testFunction(2, 2);

		//Check
		printStatus(testFunction);


		//Fill type-info
		deoptimizedTestFunction(2, 2);

		// 2 calls are needed to go from uninitialized -> pre-monomorphic -> monomorphic
		deoptimizedTestFunction(2, 2);

		%OptimizeFunctionOnNextCall(deoptimizedTestFunction);

		//The next call
		deoptimizedTestFunction(2, 2);

		//Check
		printStatus(deoptimizedTestFunction);