Ruby on Rails
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- DHH says Rust is ~150x faster than Rails; devs find an unequal benchmark
At Rails World 2026 in late September, Ruby on Rails creator DHH said he stopped hand-writing code about four months ago and announced that 37signals' HEY will move to native clients with a Rust-rewritten backend. He then published a multi-language Campfire benchmark claiming Rust hit 36,260 requests per second on a chat-room page load — roughly 150x Rails, 50x Elixir and 9.4x Go. Developers who inspected the public repos found the Rust version had accumulated 398 commits in six days (380 by DHH) versus 3 each for Elixir and Go, with different task instructions for each agent, and called the comparison unfair. DHH responded that he didn't intervene in the implementations and only asked frontier agents to maximize performance.
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