![\"\"](\"https:\/\/www.newsbeep.com\/uk\/wp-content\/uploads\/2026\/05\/1630805.webp\")
<\/p>\nDevOps<\/p>\n
Version 1.3.14 of JavaScript toolkit released as last Zig version; a million lines of Rust code merged in gargantuan commit<\/p>\n
A pull request with a Rust version of Anthropic\u2019s Bun, a
\nJavaScript toolkit and runtime originally written in Zig, has been merged to
\nthe main Bun repository. This comes just days after its author, Jared Sumner, said
\n“there’s a very high chance all this code gets thrown out.”<\/p>\n
Sumner posted on X (formerly Twitter) five days ago that “99.8 percent of bun’s pre-existing test suite passes on Linux x64f
\nglibc in the rust rewrite,” a clue that what was initially described as an
\nexperiment was likely to make it to production. Three days later, the Bun team
\nreleased version 1.3.14, with Sumner stating that if the Rust rewrite was
\nmerged, “this would be the last version in Zig.”<\/p>\n
<\/p>\n
\n Creator Jarred Sumner presented Bun in a launch video<\/p>\n
Today that merge took place,
\nadding more than one million lines of code. Sumner said it passes Bun’s test
\nsuite on all platforms, fixes some memory leaks, and shrinks the binary size by
\nbetween 3 and 8 MB.\u00a0<\/p>\n
“Most importantly, we now have compiler-assisted tools
\nfor catching and preventing memory bugs, which have cost the team an enormous
\namount of development and debugging time over the years,” he said in a
\ncomment. Performance is either neutral or faster, he said, though the codebase
\nis “the same architecture, the same data structures.” No async Rust
\nis used.<\/p>\n
Bun users have hit memory leak issues when deploying it as a
\nproduction runtime. According to Sumner,
\n“Rust won\u2019t catch all of these – leaks from holding references too long
\nand anything that re-enters across the JS boundary are still on us. But a large
\npercentage of that list is use-after-free, double-free, and forgot-to-free-on-error-path,
\nand those become compile errors or automatic cleanup.”<\/p>\n
![\"AI](\"https:\/\/www.newsbeep.com\/uk\/wp-content\/uploads\/2026\/05\/5240406.webp\")
<\/p>\n
\n AI Slop? A pull request removing Zig source files from Bun was automatically flagged.<\/p>\n
A second pull request, removing upwards of 600,000 lines of Zig code,
\nwas automatically flagged by GitHub as “AI slop” and closed, but will
\npresumably reappear in some form.<\/p>\n
The size of these commits makes them near-impossible for Although the idea of the Rust port has been well received, the \n Bun creator Jarred Sumner said that AI writes all the code<\/p>\n
\nhumans to review. “What a nice reviewable little commit. I’m sure it will
\nnot contain any bugs,” said<\/a>\u00a0one comment on the Rust merge.<\/p>\n
\nspeed of the transition has taken the community by surprise. In normal circumstances,
\nporting a major project so quickly would be risky, but this has been accomplished
\nusing AI tools. According to Sumner, it is “essentially the same codebase
\nported to Rust.”<\/p>\n![\"\"](\"https:\/\/www.newsbeep.com\/uk\/wp-content\/uploads\/2026\/05\/5240449.webp\")
<\/p>\n