FluxRPC Engineering

Notes from the RPC stack.

Benchmarks, bottlenecks, and production fixes from the team running Solana RPC infrastructure at scale.

Also check out Under the Rug, RugCheck's engineering blog.

Updated September 22, 2026

Topics

  1. Latest 10 min read

    Solana 250ms Slots Are Live: What Developers Need to Change

    Solana's 250ms slot target is live on mainnet. A five-minute FluxRPC measurement on September 21, 2026 observed approximately 268ms per slot. Here is what changes for blockhash validity, transaction retries, RPC polling and slot-to-time calculations.

    solanaslot-timessimd-0525

    FluxRPC Team

  2. 9 min read

    Introducing fluxrpc/solana-go: the Solana Go SDK we needed

    A lean, optimized and spec-complete Solana SDK for Go, built around performance and long-term API stability — with streaming getProgramAccounts, a complete Yellowstone client and an RPC cache that turns most account reads into local hits.

    gosolana-gosdk

    CloakdDev avatarCloakdDevTechnical Founder at FluxRPC

  3. 6 min read

    How We Cut Base58 CPU Usage from 20% to 1–2% in Our Solana RPC Stack

    Production profiling at FluxRPC showed that around 20% of total CPU time was spent on encoding or decoding. After applying our optimized codec, we saw the time spent drop to 1–2% at most.

    base58performancerpc

    CloakdDev avatarCloakdDevTechnical Founder at FluxRPC