“Real maturity problems”: Not every developer is thrilled with Bun after Anthropic acquisition
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Developer sentiment around Bun, the JavaScript runtime acquired by Anthropic in December 2025, is mixed. While Bun is praised for its speed (3ms startup vs Python's ~45ms), critics point to memory leaks, ~4.7k open GitHub issues compared to Node.js's ~1.7k, and concerns that Anthropic's integration with Claude Code could compromise Bun's development priorities. Some developers worry that feature additions are outpacing stability fixes, and that Bun's deep embedding in Claude Code creates a dependency risk if Anthropic's policies negatively affect the project.
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Anthropic acquisitionPython slides slowerExcessive memory usageOpen feature issuesBun is embedded in Claude CodeHappy Bun usersSort: