BUN 1.4

Summary from the TLDR DevOps newsletter

Bun 1.4 improves Node.js compatibility with more than 1,500 additional passing Node test cases while cutting idle CPU usage by up to 5×, reducing memory use by as much as 48% in some server workloads, and roughly doubling startup speed on Linux. The release also adds new built-ins including image processing, WebView, Markdown parsing, cron jobs, parallel test and script execution, package auditing, and deduplication, while continuing Bun's broader migration from Zig to Rust.