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Bun 1.4's Rust rewrite cuts script startup time from 10.5ms to 4.2ms

Bun 1.4 shipped on 20 August as the first stable release built on Bun's new Rust-based core, replacing the Zig runtime layer that shipped everything since 1.0.

  • Bun 1.4 rewritten in Rust, replacing previous Zig runtime
  • Startup time improved 60%, from 10.54ms to 4.22ms
  • Idle memory usage reduced 46%, from 34.9MB to 19.0MB

5 Errors I Hit Building DeFi Bots (And How to Fix Them)

Building production bots on free APIs sounds cool in theory. In practice, you hit walls immediately. Here are the 5 real errors I encountered while building two Ethereum monitoring bots, and exactly…

  • WebSockets timeout issue resolved by switching to polling every 15 minutes
  • CoinGecko rate limit avoided by reducing polling frequency or tokens tracked
  • Supabase Row-Level Security issue fixed by disabling RLS or creating policy

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