Sei Labs reports a 13.7x throughput gain from the state store built for Sei Giga

FlatKV Clears 200,000 TPS in Internal Testing

@Sei_Labs has published benchmark results showing its new FlatKV storage engine averaged 205,913 transactions per second across a 24-hour test window. That figure stands 13.7 times above the roughly 15,000 TPS recorded by @SeiNetwork's current MemIAVL store under the same conditions, according to the team.

FlatKV is part of Eidos, the storage component of Sei's broader Giga upgrade program. Eidos is set to replace the existing structure for EVM state with FlatKV, a flat key-value storage system where an individual state change requires a single write. Verification will be handled using LtHash, or lattice hashing, which maintains a running fingerprint of the state. Under the design described by Sei, LtHash can update that fingerprint in constant time when state changes, removing the need to recalculate a path of hashes through a Merkle tree.

Where Giga Stands on Mainnet

The first phase of Eidos reached Sei mainnet with the v6.6 release in August 2026, with EVM state beginning to move into its own dedicated database. That initial release also shipped a rebuilt pruning path, reducing a cleanup pass that used to take 8 to 18 minutes down to about five, and keeping nodes within 60 blocks of the chain tip.

The larger components of Eidos, including FlatKV with its lattice hash, the LittDB-backed receipt store, and the off-node archive, will arrive in subsequent releases. @Sei_Labs has the new store slated for a later release, where it replaces the Merkle tree for EVM state.

The upgrade is the storage component of a three-part architecture overhaul that also includes Autobahn for consensus and Ares for transaction execution. Sei Labs released its Giga whitepaper with a design targeting 200,000 transactions per second, 5 gigagas of throughput, and finality below 400 milliseconds. The migration is designed to run while Sei remains online, with existing and new storage systems operating alongside each other.

Sei's internal testing has demonstrated more than 200,000 TPS under controlled conditions, though those results do not represent sustained mainnet performance. The FlatKV benchmark adds further weight to the storage case, but the full Giga stack, including the Autobahn consensus layer, has yet to reach mainnet.

Sources
Sei Labs: The Eidos Upgrade, Sei Official Blog
Sei starts phased Eidos upgrade to prepare network for 200,000 TPS, Crypto News
Ares and Eidos: The first components of the Giga Upgrade, Sei Official Blog