Bun v0.5.2

[Jarred-Sumner]

Read Bun v0.5.2's release notes on Bun's blog

This release is a follow up to Bun v0.5 and Bun v0.5.1

To install:

curl https://bun.sh/install | bash
# or you can use npm
# npm install -g bun

To upgrade:

bun upgrade

What's Changed

• constructor parameter properties are lowered in class expressions by @dylan-conway in constructor parameter properties are lowered in class expressions #1867
• [semver] parse ^ & ~ expressions correctly by @alexlamsl in [semver] parse ^ & ~ expressions correctly #1854
• minor clean-ups by @alexlamsl in minor clean-ups #1869
• feat(dns) resolveSrv by @cirospaciari in feat(dns) resolveSrv #1870
• enhancement(fetch): Merge parameters from request parameter with the second parameter for fetch, move verbose and proxy options to second parameter, add non-TLS tests for fetch by @cirospaciari in enhancement(fetch): Merge parameters from request parameter with the second parameter for fetch, move verbose and proxy options to second parameter, add non-TLS tests for fetch #1862
• fix constructor statement order by @dylan-conway in fix constructor statement order #1883
• fix child process node test hang by @dylan-conway in fix child process node test hang #1884
• fix(Buffer) Fix arguments in buffer.write, fix size returned from buffer.write for utf16, fix size calc for base64, fix calc for hex byte size by @cirospaciari in fix(Buffer) Fix arguments in buffer.write, fix size returned from buffer.write for utf16, fix size calc for base64, fix calc for hex byte size #1881
• npm install bun by @Electroid in npm install bun #1874
• support bun link of scoped packages by @alexlamsl in support bun link of scoped packages #1892
• support GitHub URLs as dependencies by @alexlamsl in support GitHub URLs as dependencies #1875
• Add FileSystemRouter + React example by @scally in Add FileSystemRouter + React example #1894
• parse package-spec from CLI correctly by @alexlamsl in parse package-spec from CLI correctly #1895
• fix(WebSocket) Fix large packages receive for WS client by @cirospaciari in fix(WebSocket) Fix large packages receive for WS client #1909
• fix websocket hang by @dylan-conway in fix websocket hang #1910
• Implement all pending resolve methods in DNS by @cirospaciari in Implement all pending resolve methods in DNS #1903
• fix(Express.js) Express.js try to use function as hostname by @cirospaciari in fix(Express.js) Express.js try to use function as hostname #1914
• ensure name is allocated with toSliceClone by @dylan-conway in ensure name is allocated with toSliceClone #1917
• [WIP] append GitHub package after fully parsed by @alexlamsl in [WIP] append GitHub package after fully parsed #1911
• fix(bench): Fix if condition always being true by @u9g in fix(bench): Fix if condition always being true #1923
• fix corner cases with aliased dependencies by @alexlamsl in fix corner cases with aliased dependencies #1927
• normalise bun add package specifiers by @alexlamsl in normalise bun add package specifiers #1924
• parse git+https://github.com/ as GitHub URLs by @alexlamsl in parse git+https://github.com/ as GitHub URLs #1926
• Support running WASI (WebAssembly) files using bun run by @Jarred-Sumner in Support running WASI (WebAssembly) files using bun run #1929
• [bun add] fix more corner cases by @alexlamsl in [bun add] fix more corner cases #1930
• Update README.md by @Ygnys in Update README.md #1934
• [bunx] fix version parsing by @alexlamsl in [bunx] fix version parsing #1937
• report invalid input file as test failure by @alexlamsl in report invalid input file as test failure #1938
• fix assert() crash by @alexlamsl in fix assert() crash #1941
• fix utf16le fill and utf8 partial write of utf16 by @cirospaciari in fix utf16le fill and utf8 partial write of utf16 #1943

New Contributors

• @scally made their first contribution in Add FileSystemRouter + React example #1894
• @Ygnys made their first contribution in Update README.md #1934

Full Changelog: bun-v0.5.1...bun-v0.5.2

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This discussion was created from the release Bun v0.5.2.

[ClementNerma]

Thanks for the release!

I'm sure there's something I misunderstand here, but when I look at the reported performance improvements for Buffer, something seems weird. Going from ~34 ns/iter to ~77 ns/iter in the new version isn't a 2x improvement, it's more of a 2x slowdown right?

I suppose there's something I misunderstand but I can't wrap my head around this, so if you could please enlighten me ^^"

[Jarred-Sumner]

I got the results backwards when I copy pasted it from the terminal. The snippet has a bunch of other benchmarks in it that were irrelevant to Buffer.from

You can run the file "buffer-create.mjs" in bench/snippets to test yourself

[ClementNerma]

I see, thanks for the explanation :)