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Bun
@bunjavascript
Bun is a fast, all-in-one toolkit for installing, bundling, running and testing JavaScript & TypeScript. To install: `npm i -g bun`
bun.com
Joined July 2022
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2026 X Corp.
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Bun
@bunjavascript
Dec 2, 2025
Bun is joining Anthropic!
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Bun is joining Anthropic
From bun.com
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Bun
@bunjavascript
Aug 25
Upgrading to Bun v1.4 reduced Tanstack Start memory usage by 1.8x - 2x here
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Raphal C.
@Zareix
Aug 25
Divided by 2 RAM usage of my two Tanstack Start apps by upgrading to
@bunjavascript
v1.4
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Bun
@bunjavascript
Aug 24
In the next version of Bun `Bun.serve({ http2: true })` enables HTTP/2 support. The same API just works for HTTP/1.1, HTTP/2, and HTTP/3.
[Bar chart: "Bun.serve() now speaks HTTP/2". Requests per second, HTTP/2 over TLS, Linux x64. Three bars per scenario: Bun.serve(), node:http2 in Bun, node:http2 in Node.js v26. Hello World (GET, 13 B response): 291,512 / 55,619 / 42,733 6.8 faster POST 4 KB body: 136,077 / 45,366 / 30,112 4.5 faster 2 KB URL (GET, long path + query): 113,648 / 43,168 / 31,249 3.6 faster 64 KB response: 17,357 / 13,771 / 12,979 1.3 faster Streaming (256 KB in 32 KB out): 4,570 / 4,563 / 2,164 2.1 faster Speedup is Bun.serve() vs Node.js v26.3. Bun v1.4.1, 64 cores, loopback, fresh server process per run. h2load -c 64 -m 16 -t 8 -n 100000.]
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Bun
@bunjavascript
Aug 24
In the next version of Bun Compiled executables with bytecode start 17% faster, get 30% smaller, and use 30% less memory on start
[Dark graphic with the Bun logo and the command bun build --compile --bytecode --splitting. Headline: "In the next version of Bun, compiled executables get". Three large stat cards: "34% smaller binary 428 MB 284 MB" in pink, "17% faster startup 458 ms 382 ms" in orange, "32% less RAM 383 MB 260 MB" in green. Footer: "57 npm packages 36 MB minified bundle Linux x64 ESM medians vs Bun v1.4.0" and a pill reading "bytecode is now mmap'd & read in place".]
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Bun
@bunjavascript
Aug 23
In the next version of Bun Buffer's read/write methods get up to 7x faster
[Benchmark card titled "Buffer reads & writes get faster Coming in Bun v1.4.1. Now JITcompiled into direct loads & stores." Highlight tiles: 7.7 faster writeUInt8, 7.3 faster writeDoubleLE, 3.1 faster readInt32LE across 1,024 buffers, all vs Bun 1.4.0. A horizontal bar chart compares nanoseconds per call (lower is better, Apple Silicon) for Bun 1.4.1, Bun 1.4.0 and Node 26.5, with the speedup vs Bun 1.4.0 on the right. Varying offset over one 4 KB buffer: readInt8 0.24 vs 0.32 ns (1.3), readUInt8 0.24 vs 0.48 (2.0), readInt16BE 0.37 vs 0.56 (1.5), readDoubleLE 0.61 vs 0.81 (1.3), writeUInt8 0.28 vs 2.16 (7.7), writeInt16BE 0.33 vs 2.29 (6.9), writeUInt32BE 0.38 vs 2.63 (6.9), writeFloatLE 0.28 vs 2.11 (7.5), writeDoubleLE 0.27 vs 1.98 (7.3). One access on each of 1,024 buffers: readInt32LE 0.65 vs 2.01 (3.1), writeInt32LE 0.57 vs 1.2 (2.1), readDoubleLE 0.66 vs 1.46 (2.2). Node 26.5 is shown for context and ranges from 0.24 to 2.93 ns on the same tests.]
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