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@ -5,15 +5,8 @@
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### One Paragraph Explainer
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Sometimes, using native methods is better than requiring `lodash` or `underscore` because it **will not lead in a performance boost** and use more space than necessary.
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The performance using native methods result in an overall ~50% gain which includes the following methods:
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- `Array.concat`
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- `Array.fill`
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- `Array.filter`
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- `Array.map`
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- `(Array|String).indexOf`
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- `Object.find`
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- ...
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Sometimes, using native methods is better than requiring `lodash` or `underscore` because it will not lead in a performance boost and use more space than necessary.
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The performance using native methods result in an [overall ~50% gain](https://github.com/Berkmann18/NativeVsUtils/blob/master/analysis.xlsx) which includes the following methods: `Array.concat`, `Array.fill`, `Array.filter`, `Array.map`, `(Array|String).indexOf`, `Object.find`, ...
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<!-- comp here: https://gist.github.com/Berkmann18/3a99f308d58535ab0719ac8fc3c3b8bb-->
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@ -21,7 +14,7 @@ The performance using native methods result in an overall ~50% gain which includ
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<br/><br/>
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### Example: benchmark comparison - Lodash vs V8 (Native)
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The graph below shows the mean of the benchmarks for a variety of Lodash methods, this shows that Lodash methods take on average 146.23% more time to complete the same tasks as V8 methods.
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The graph below shows the [mean of the benchmarks for a variety of Lodash methods](https://github.com/Berkmann18/NativeVsUtils/blob/master/nativeVsLodash.ods), this shows that Lodash methods take on average 146.23% more time to complete the same tasks as V8 methods.
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@ -47,29 +40,30 @@ Which returns this:
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You can find a bigger list of benchmarks [here](https://github.com/Berkmann18/NativeVsUtils/blob/master/index.txt) or alternatively [run this](https://github.com/Berkmann18/NativeVsUtils/blob/master/index.js) which would show the same but with colours.
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### "You don't (may not) need Lodash/Underscore"
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### Blog Quote: "You don't (may not) need Lodash/Underscore"
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From the [repo on this matter which focuses on Lodash and Underscore](https://github.com/you-dont-need/You-Dont-Need-Lodash-Underscore).
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> Lodash and Underscore are great modern JavaScript utility libraries, and they are widely used by Front-end developers. However, when you are targeting modern browsers, you may find out that there are many methods which are already supported natively thanks to ECMAScript5 [ES5] and ECMAScript2015 [ES6]. If you want your project to require fewer dependencies, and you know your target browser clearly, then you may not need Lodash/Underscore.
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There's also an [ESLint plugin](https://www.npmjs.com/package/eslint-plugin-you-dont-need-lodash-underscore) which detects where you're using libraries but don't need to.
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Here's an example of that plugin in use:
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Consider a file called _lodashLove.js_ shown below
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```js
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const _ = require('lodash');
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let arr = [0, 1, 2, 4, 8, 16];
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console.log(_.map(arr, x => `d${x}`));
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if (_.includes(arr, 0)) console.log('0 found');
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console.log('compacted:', _.compact(arr));
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### Example: Linting for non-native methods usage
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There's an [ESLint plugin](https://www.npmjs.com/package/eslint-plugin-you-dont-need-lodash-underscore) which detects where you're using libraries but don't need to by warning you with suggestions (cf. example below).<br>
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The way you set it up is by adding the `eslint-plugin-you-dont-need-lodash-underscore` plugin to your ESLint configuration file:
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```json
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{
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"extends": [
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"plugin:you-dont-need-lodash-underscore/compatible"
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]
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}
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```
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### Example: detecting non-v8 util usage using a linter
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Consider the file below:
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```js
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const _ = require('lodash');
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// ESLint will flag the line above with a suggestion
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console.log(_.map([0, 1, 2, 4, 8, 16], x => `d${x}`));
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```
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Here's what ESLint would output when using the YDNLU plugin.
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