Progress of Sub-Second update deployment on the TON mainnet

TON is gradually transitioning to an architecture where operation times are measured in milliseconds rather than seconds.

The Sub-Second update is one of the biggest technological improvements to the network in recent years.

New API and UX already on the main network

— Toncenter API has released a new accelerated Streaming API V2 for all users on the main and test networks.

— The first products — MyTonWallet and tonscan.org — have already switched to Streaming API V2 on the main and test networks.

This has already nearly halved the operation time in these products, even though the blockchain itself is still operating in the same mode.

— Other products and services in the ecosystem can already connect to the new API and implement the updated UX approaches.

Blockchain update

— On February 12, the main network validators were updated to the new accelerated network layer code and Catchain 2.0 consensus.

— The new functionality has not yet been enabled and will be activated after testing is complete.

Progress of Sub-Second update testing on the test network

The TON test network has been running stably for over a month since the January 23 update with the activation of Sub-Second mode:

— On average, 2-3 blocks are created per second.

— The network is operating under real organic load.

— Various validators are participating.

Load testing

During testing, tests were conducted under relatively high load. The results showed that with 1,000 transactions per second in a single shardchain, the operation time remains less than a second.

For comparison, even during periods of high load on the main network during the minting of Notcoin, DOGS, and Hamster Kombat projects, the average TPS did not exceed ~500.

Improvements and fixes

During testing, the TON Core team made a number of improvements. Of particular note:

— Disk performance has been optimized so that nodes with slower disks can synchronize stably at the new block rate.

— The stability and performance of the new consensus has been improved, and the handling of scenarios where some validators are temporarily out of service has been improved.

In addition to working on Sub-Second, two service updates have been released with fixes and improvements to the stability of the main network: TON 2026.02 (February 12) and TON 2026.02-1 (February 24).