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Bun uses JSC (JavaScriptCore) instead of V8. From what I understand, whereas Node/V8 has a higher tier 4 "top speed", JSC is more optimized for memory and is faster to tier up early/less overhead. Good for serverless. Great for agents -> Anthropic purchase.
> Good for serverless. Great for agents -> Anthropic purchase.

Surely nobody would use javascript for either yea? The weaknesses of the language are amplified in constrained environments: low certainty, high memory pressure, high startup costs.

I think Bun helps with the memory pressure, granted this is relative to V8. I'd pushback on the certainty with the reality that TS provides a significant drop in entropy while benefiting from what is a sweet spot between massive corpus size and low barrier for typical problem/use-case complexity. You'll never have the fastest product with JS, but you will always have good speed to market and be able to move quickly.
> Surely nobody would use javascript for either yea?

It's probably the most popular language for serverless.

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Claude CLI is based on bun. The dependency is so complete that Bun have now joined Anthropic.
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