At its core is the Bun runtime, a fast JavaScript runtime designed as a drop-in replacement for Node.js
Bun is a fast JavaScript all-in-one toolkit that helps to develop, test, run, and bundle JavaScript & TypeScript projects. It claims to be really fast in terms of runtime and development. So it should not only make the app faster but speed up the development process too. Bun offers various features including built-in bundling and transpiling, first-class support for TypeScript and JSX, and the ability to directly execute .jsx, .ts, and .tsx files.
Its speed is a significant highlight, with Bun’s processes starting up to four times faster than Node.js. Additionally, Bun supports both ES modules and CommonJS, catering to the modern shift towards ES modules while maintaining compatibility with the extensive library of CommonJS packages available on NPM.
At the heart of Bun is its runtime, engineered specifically as a speedy alternative to Node.js. The magic behind this speed? It’s written in Zig and powered by JavaScriptCore, significantly cutting down on startup times and memory usage
Digging into SQLite Bun, it’s a module that natively implements a high-performance SQLite3 driver. Now, for those not familiar with such terminology, don’t fret! In simpler terms, it’s like a mini super-powered engine designed to interact with your data in the most efficient way possible.
It includes features like transactions, parameters (both named & positional), prepared statements along with datatype conversions. Plus, it boasts the fastest performance among any SQLite drivers for JavaScript.
SQLite Bun also takes care of closing databases automatically when they are garbage collected which adds another layer of convenience for web developers. Additionally, there are several different methods available to execute a Statement each returning results in a distinct form allowing flexibility depending on what information you need from your query.
SQLite Bun provides a simple and synchronous API that makes it easy to use. With clear commands such as .run() for schema-modifying queries or .get() for retrieving the first result object from a query, managing your database becomes intuitive and straightforward.
Bun implements a set of native APIs on the Bun global object and through a number of built-in modules. These APIs are heavily optimized and represent the canonical “Bun-native” way to implement some common functionality.
Bun strives to implement standard Web APIs wherever possible. Bun introduces new APIs primarily for server-side tasks where no standard exists, such as file I/O and starting an HTTP server. In these cases, Bun’s approach still builds atop standard APIs like Blob, URL, and Request.
Bun strives to avoid re-downloading packages multiple times. When installing a package, if the cache already contains a version in the range specified by package.json, Bun will use the cached package instead of downloading it again.
ince Bun uses hardlinks to “copy” a module into a project’s node_modules directory on Linux, the contents of the package only exist in a single location on disk, greatly reducing the amount of disk space dedicated to node_modules.
This benefit also applies to macOS, but there are exceptions. It uses clonefile which is copy-on-write, meaning it will not occupy disk space, but it will count towards drive’s limit. This behavior is useful if something attempts to patch node_modules/*, so it’s impossible to affect other installations.
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