Mitchell Hashimoto

@mitchellh

Co-founder of @Superlogical. Creator of Ghostty. 👻 Prev founded @HashiCorp, created Vagrant, Terraform, Vault, and others.

Los Angeles, CA

mitchellh.com

Joined January 2008

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Mitchell Hashimoto
@mitchellh
26s
Good moment today to remind everyone to stay frosty with AI. I was working on making a server stoppable via the CLI, and Codex decided the best path forward was to implement an unauthenticated network API to every server to shut itself down. Excellent work. I responded with "I
Mitchell Hashimoto
@mitchellh
6h
I've moved on to optimizing libghostty Wasm runtime memory usage and I am learning a lot! The first discovery: Zig's `std.heap.MemoryPool` is very bad for Wasm! We replaced it with a custom Wasm-specific pool that lowered libghostty's required terminal memory by 75% without any
libghostty: use custom memory pool for Wasm, reduce terminal memory by ~75% by mitchellh · Pull...
From github.com
Mitchell Hashimoto
@mitchellh
22h
Something I routinely am in awe about is the compute amplification every commit has today vs. 20 years ago, at least personally. Back then, my personal computer was only non-idle when I was working locally. I ran tests locally. When I pushed, there was no CI. The tests
Mitchell Hashimoto
@mitchellh
Aug 14
A couple more notes on this: First, the xterm.js benchmarks were very noisy. A lot of the results relied on whether they got lucky with the V8 JIT/inliner. e.g. the frame times for ASCII ranged from 20us to 100us (!!!). For the purpose of optimism, I only used the fastest times
Mitchell Hashimoto
@mitchellh
Aug 14
libghostty for WebAssembly got a lot of love recently and is now very, very, very good. I spent the day building harnesses and comparing to xterm.js and here are the results: faster at IO, faster at reflow, faster at rendering. Like, a lot a lot faster. We now provide pre-built
Mitchell Hashimoto
@mitchellh
Aug 14
libghostty for WebAssembly got a lot of love recently and is now very, very, very good. I spent the day building harnesses and comparing to xterm.js and here are the results: faster at IO, faster at reflow, faster at rendering. Like, a lot a lot faster. We now provide pre-built