what is the fastest blockchain?

As an everyday user, I keep seeing blockchains boast high TPS, rapid block times, impressive BPS, and instant confirmations. But does any of that really translate into a smooth and reliable experience?

In this post, I’ll share my view on what truly makes a blockchain fast and how Alephium intelligently delivers genuine performance for the real Web3 that we were promised.

⏰ TPS Is Not Everything

TPS represents how many transactions a blockchain can process per second. However, it does not reflect the full picture:

Inflated TPS: Some blockchains boost their numbers by counting lightweight or trivial transactions
No Insight into Completion Time: TPS alone does not reveal how quickly a transaction reaches finality
User Experience Overlooked: High numbers often fail to translate into smooth real-world experiences

So, what factors really matter?

🧭 Other Key Metrics

Genuine blockchain speed involves three critical factors:

Block Time The average time required to produce a new block. Shorter block times generally lead to quicker transaction processing. Example:

Under 1 second: extremely fast (often DAG-based chains)
8–12 seconds: standard for stable, secure blockchains

Blocks Per Second (BPS) The total number of blocks produced each second by the entire network, indicating real throughput capability. Example:

1–2 BPS: common among single-chain blockchains
10 or more BPS: typically seen in DAG-based or highly sharded blockchains

Finality The amount of time it takes for a transaction to become irreversible and fully secure. Example:

Less than 30 seconds: ideal for smooth user experiences
More than 60 seconds: considered slow and potentially problematic for user experience and dApps

These metrics directly shape how fast, reliable, and secure a blockchain truly feels.

🚧 When Speed Comes at a Cost

Many blockchains promote impressive performance metrics, but there are often hidden compromises:

Centralisation: Increased speed typically requires powerful hardware, raising the cost to run a node and limiting decentralisation.
Instability: Excessively high TPS or BPS without careful design often leads to frequent congestion, transaction reversals, or orphaned blocks.
Complexity: Users and developers frequently rely on complicated solutions such as Layer 2, sidechains, or expensive hardware setups, making the blockchain less accessible and more centralised.

Flashy metrics can mislead. Real blockchain speed requires stability, decentralisation, simplicity, and security.

If ordinary users cannot easily run nodes, decentralisation remains purely theoretical.

🌟 Alephium: The Web3 Performance You Were Promised

Alephium, a Layer 1 blockchain utilising PoLW and BlockFlow sharding, strikes a smart balance between speed, security, and decentralisation:

Block Time: 8 seconds per chain (after the Danube upgrade), ensuring responsive transactions.
BPS: 2 blocks per second across 16 parallel shards, made possible by native BlockFlow Sharding architecture.
Finality: Typically within 8 to 32 seconds (1 to 4 blocks), combining practical speed with robust security guarantees.

What truly sets Alephium apart is its uncompromised decentralisation:

Users can effortlessly run a full node on minimal hardware, such as ASIC miners, older laptops, or even tiny devices like a Raspberry Pi.
This low hardware requirement ensures genuine decentralisation, allowing virtually anyone to participate directly in network validation and security.

Alephium achieves this practical speed through:

BlockFlow Sharding: Efficiently divides network load, allowing nodes to process data in parallel.
Stateless Mining: Keeps node hardware requirements minimal and affordable.
Proof-of-Less-Work (PoLW): Ensures strong network security and decentralisation with lower energy demands.

Alephium consistently improves network performance and usability directly at Layer 1 without relying on Layer 2 solutions, complex workarounds, or sacrificing decentralisation.

🤗 Users Deserve a Real Blockchain

True blockchain speed involves more than achieving high throughput on paper. It must consistently deliver:

Quick and Secure Confirmations: Minimising user waiting times and uncertainty.
Strong Irreversibility: Providing rapid, dependable finality.
User-Friendly Simplicity: Offering a seamless user experience accessible to all, without technical barriers.

Alephium prioritises these practical performance aspects over exaggerated numerical claims.

💭 My Final Thoughts

Real blockchain speed is far more nuanced than impressive TPS figures. Speed means achieving rapid and secure transaction finality combined with a genuinely smooth user experience, without hidden compromises.

Alephium clearly demonstrates that a blockchain based on Proof-of-Work, with full smart contract capabilities, can match or even surpass the practical speeds commonly associated with Proof-of-Stake chains that rely heavily on complex, layered solutions.

With its modest hardware requirements enabling anyone to run nodes effortlessly, Alephium proves decentralisation can truly coexist with high performance and user-friendliness.

Speed, decentralisation, security, and simplicity can indeed coexist directly at Layer 1. This represents genuine innovation—no hype necessary.

👉 Ready to experience real blockchain speed without compromise?

Explore Alephium today: https://alephium.org

This is a community-run blog for third-party contributors. The views expressed here are those of the authors and do not reflect the official Alephium project. This content is for informational purposes only and does not constitute financial, legal or investment advice. Cryptocurrency carries risk and is highly volatile. Information may be incomplete or outdated. Always conduct your own research. We disclaim liability for any loss or damage resulting from reliance on this article.

Is Blockchain Truly as "Fast" as You Think ⁉️

Table of contents